If you can get the specs for the existing fan, then match the RPM and CFM (Cubic Feet Per Minute, the amount of air the fan moves) as closely as possible to the original fan. I suspect you could put a more aggressive or heavier fan blade on the motor … * Is it cost prohibitive? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Lastly, about motor rating: just because the motor is rated for 200mA at 12v, doesn't mean the fans load is big enough to reach that rating. Laptops. This fan seems to be running at roughly 25% rating, but that's probably a design feature to limit current, noise, and increase efficiency and longevity. Try and find a fan that moves as close to the same amount of air or better and has the same or lower power requirements. In this example, I’m using a 12V DC power supply with a DC connector to plug the computer fan. Automotive fans are rated at 13.5 volts, and the rating is after the motor is at operating RPM. The stated current rating is not to determine cooling performance. No, then I would get something similar and make it work. The easiest way to determine what fan you need to replace your existing chassis fan is to remove it and check the markings on it. You’ll be able to see it if the connectors are different sized or different shaped, so that one’s easy Can I assign any static IP address to a device on my network? It's going to be 115Vac, 12Vdc, or 5Vdc. Current rating and air movement are not a 1:1 correlation except within the same line of a manufacturer. Remember that the fan is PWM controlled, so the current is not a DC current. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. A quiet fan will generally use more current to move the same amount of air than a noisier fan will. As for brads, if you are lucky enough to find a Nidec or NMB fan, those are the best fans in my experience, but they are hard to find. rev 2021.1.7.38271, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. By connecting one or both wires to a different voltage, the voltage the fan receives will be different from the default 12 V the fan was designed for. It specs at 5V, 0.26A. (Last one unlikely as that still doesn't explain the drop to 40mA.). I once taught my uni's robotics club some basic electronics, using DC computer case fans and transistors etc. * Is it still available? To learn more, see our tips on writing great answers. Firstly, the voltage in the UK is officially 230v (single phase, domestic). Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. Thanks for contributing an answer to Electrical Engineering Stack Exchange! But if this server runs hot or is in a warm environment, a sleeve bearing fan may actually last longer. I would try to get as close to the original current draw as possible. For example that fan seems to have either 3-phase brushless, or it has a tacometer and something else. something like a laptop power adapter will work, try to find one that's 12v and at least one amp. It’s the amperage that kills you not the voltage. Other designs cause full-speed operation with the control lead dangling. I have no doubt that your system could supply 1A for the fan without an issue, but that fan would probably sound like a jet engine. I'll play around with it a bit more. Yes, then then I would look for it on the internet. 8 years ago No, it is safe to use the high amperage. You can be fairly certain that the system was designed to supply the power the fan required. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A Question Regarding Voltage and Amperage on a PC Fan. Current con sumption on a fan varies from the spec by how much air it is actually moving. That small increase in current will not affect matters. Solid-state switching, microprocessor control, PWM, or inveterter modulation control speed and torque, making the current rating printed on the dc fan meaningless in terms of inline DMM current measurement. you cannot wire that fan directly to a wall plug. I'll have a play around with it a bit more with your advice. Asking for help, clarification, or responding to other answers. Lo and behold, every single one of them pulled almost exactly 120mA from the bench power supply when given 12V (directly, or when MOSFET used as low side power switch). DC Voltage measurement using a DT830B multimeter. Voltage is easy because there's not that much variety in the systems. I am going to break out my soldering iron to make the connectors match up, but now I'm on a quest to find a fan that will work. If the fan is offered for general computer use, you are probably OK. It doesn't need to be an exact match. Replaced again with .15A fans and alarm went away. If you need to utilize usb 3.2 or want a real quick charge (Qualcomm 3.0) charger look elsewhere not to mention my pc case has a seldom-used speed selector for it's fans and CPU fans shouldn't be manualy adjusted. To continue this discussion, please Are you using a true RMS multimeter? Get the same if you can. But if it's not worth your time hitting the local store it's likely not worth your time to repair it either. 100mA are sucked out of the 5V … Since you need charger of certain voltage for the laptop to work, your output voltage is set. If you go too low it may not have enough power to keep it cool, or if the fan requires too much then there is a chance that it will not run at all. I'm new to this electrical stuff and trying to better understand it. Why isn't there a proportionate increase in current with every increase in voltage? Understanding the resistor method of slowing server fan speeds. The Fan Laws are a group of useful equations for determining the effects of a change in the speed, the diameter of the fan and the density of air in the system. Making statements based on opinion; back them up with references or personal experience. Thanks ahead for the responses! MathJax reference. Under-voltage, or a heavier load will cause the motor to slow down, a slower rpm means less resistance and increased amperage. It is a design parameter used to determine supply current requirements, overall power consumption, or, where the fan is specified after the fact, by the end user, to supply a specification for maximum current. Go with the same or closest to original specs as you possibly can. With a cooling fan, the greater the airflow, the better that fan's ability to cool a radiator. 3: Last notes played by piano or not? Yes! Jul 31, 2016 #1 Hi! The faster the motor spins, the more magnetic flux is generated, and the higher the electrical resistance becomes. Let’s start with the simplest: voltage. At a fixed voltage, the current draw of the fan determines how much power it uses (volts x amps) [adjusted for things like efficiency and power factor - not really relevant for this discussion but mentioned for completeness]. If you have a different fan (or whatsoever), that sucks out 200mA from the 5V lead and feeds them to ground, you’re fine. CFM is the most pertinent factor in cooling performance, and this has 'almost' nothing to do with current rating, except under conditions determined by the manufacturer. Motors are inductive loads and work differently than resistant loads. My company stocks over 171,000 SKUs of OEM parts. I know this is almost 6 years old, but I hope someone in the future see this and it helps them. The main specification of a power supply is in watts. Any shortcuts to understanding the properties of the Riemannian manifolds which are used in the books on algebraic topology. Why is 2 special? Increasing the voltage over the default 12 V can be achieved by e.g. I would stick with the original brand and model if possible. This fan seems to be running at roughly 25% rating, but that's probably a design feature to limit current, noise, and increase efficiency and longevity. A DC fan control simply regulates the voltage, so having multiple adapters to try is a good way to dial things in. The current draw I would be less concerned about as long as the new fan does not draw more than 25-50% of the original. Amperage . Generally, the faster a fan spins, the more airflow it generates. While its controller may let it look like a reverse voltage, it probably isn't. Components: 1: Mar 22, 2020: F: Question PCIe card - USB 3.0 VL805 - no output voltage: Components: 5: Mar 19, 2020: Question Clean Motherboard Increase Rail Voltage: Components: 1: Feb 28, 2020 So yes, any fans that are rated less than 30dBA are considered to be whisper quiet. You take 100mA from the 12V lead and feed them into the 5V lead. This explains why the lower voltages are a higher power use, then it hits a sweet spot, most likely the motors most efficient speed. Can PWM affect a brushless DC fan given sufficient time? Secondly, the voltage in the USA is 120v (domestic). I've got a 12v 120mm fan that I want to use on my Thermalright Ultra-120, but it pulls 0.60A, and I'm worried that is too much. Yes, then I would get the exact same fan. What is the point of reading classics over modern treatments? on If it's three or more it's likely controlled using a tacho in which case the exact current draw isn't too critical. It should provide some information as to the manufacturer, the size of the fan and the direction of airflow. If not, and you don't have specs on the original fan, you may end up having to guess what mechanism the sense lead is using. It's very frustrating when it's basically a 70-120mm fan that goes in every other computer case but it has a funky end on it... good luck man! Hi @KyranF and Camil Staps thanks for the advice. Use MathJax to format equations. by What may be damaged when using an internal antenna tuner on SWR above 3? Track users' IT needs, easily, and with only the features you need. Most other fans I've used pull somewhere in the .1A to .2A range, so this fan is about 3 times a typical fan, and I'm worried about burning up the fan header. I think this is rather speculative. The fan motor needs power. A fan with .2A draw will probably not move enough air. How would interspecies lovers with alien body plans safely engage in physical intimacy? It depends on how intelligent the NAS unit is. you will need an adapter to convert the voltage to DC, at 12V. I know that you need to match volts/amps pretty closely with laptop fans but I'm wondering if amps would matter that much with the NAS as long as it's a 12v fan. Also was this the NAS mentioned with the fan and the funky looking plug? But there can be problems with your laptop battery life. if not, see if you can find the specs for the fan online. Anything in the .4 to .6A range would be fine. Or does it have to be within the DHCP servers (or routers) defined subnet? Typically, and it depends on the type and design of the motor (there are a few) for a 3 phase squirrel cage motor the LRA is 5-7 times the FLA. The effect of quick charging depends on the battery type. I wouldn't risk it. Its rated specs are: 12V 0.20A. V. vegitto002 Commendable. Average computer fans typically generate between 30dBA to around 40dBA of noise (audible hum). Should the stipend be paid if working remotely? Also, I think the label represents average current consumption. The fans were 12V, and showed 120mA on the datasheet. The resistance of a motors coils may only be a few ohms while stationary, but while spinning its resistance is proportional to its rpm. Dec 28, 2016 at 14:22 UTC. In the attempt to align the fields, the motor produces torque, which gives an impetus to rotate. My current Dell laptop (Vostro 3500) fan is faulty or pretty much dead. Best High Airflow Fans for PC Case. Lastly verify that the current draw (amperage) is either lower or not much higher than the original. Could be damaged, with a high resistance? No, then I would try to get the exact same fan. Does the replacement fan need to be the exact same amperage or can it be higher or lower? Frequently, as was mentioned above, small fan motors use only a fraction of the rated current, to decrease noise and increase service life. Previous Next Sort by votes. For example: Your fan uses 100mA at 7V. The system is already created to run that specified fan. Sorry if my description isn't 100% accurate. profinite completion and linear representations of finitely presented groups, Zero correlation of all functions of random variables implying independence. With motors you actually have different current draws one being the starting current of the motor (LRA- locked rotor amerage) and the other being the running current (FLA- full load amperage). to me it would all depend on the following: * Is it under warranty? I remember when I was designing a helicopter; If I held the copter down while applying constant throttle (voltage), the current was much higher than when I released it with the same throttle due to the drop in resistive force applied. A watt is the product of the voltage in volts and the current in amperes or amps. Also the ambient temperature is most probably not stable, which leads to fluctuating current measurement results. if you have any two of those you can calculate the third using Ohm's Law. If the original fan drew a max of .4A (400mA), that tells you how powerful it was which translates loosely into how much air it could move (work = power x time). Since DC motors are also generators, the reverse voltage raises proportional with the RPM. Used to be a very common occurrence to burn out fan headers on motherboards when people hooked up larger fans to them. ROUNDS PER MINUTE (RPM) How fast the fan spins… Personally, I do think this is kind of a not-so-useful spec. It's likely it can take a higher wattage fan but I wouldn't risk it unless I knew the specific specs. That fan is probably a BLDC. Discussion in 'Grow Room Design/Setup' started by THeCloset, Mar 4, 2013. If you send the model number, I can see if we have an exact replacement for you. Some don't care what fan is attached as long as it can read the RPMs. Lastly, about motor rating: just because the motor is rated for 200mA at 12v, doesn't mean the fans load is big enough to reach that rating. It can be kind of complicated and confusing if you’re not familiar with how a power supply (and to some degree, electricity itself) works.The short rules boil down to this: Cheers, Compare two voltages and output the lower of the two, Controlling a single phase AC fan with a 0-10V DC input, Need advices on an AC fan control circuit. It then outputs this stepped down voltage to your laptop. Laptop Tech Support . I really wish manufacturer's would just use stock adapters and plugs. My email is cfennewald@vibrant.com. The current spec is an average determined by the manufacturer, at a certain voltage, ambient temperature, and no air resistance. I just realized yesterday that I need to order a replacement fan for a NAS. This means that you can provide the same amount of power with different currents and voltage as long as their product is the same. more amps is better as it will accommodate more devices, such as additional fans. Here are my questions: Why are the current readings nowhere near the power rating of 0.2A? Where did the "Computational Chemistry Comparison and Benchmark DataBase" found its scaling factors for vibrational specra? Replacement fan: does current/amps matter? The 3.3- and 5-volts are typically used by digital circuits, while the 12-volt is used to run motors in disk drives and fans. As stated, voltage needs to be the same, over/under voltaging a fan will shorten it's life considerably and could cause the fan to draw too much power. No. I suspect you could put a more aggressive or heavier fan blade on the motor and still be within spec. The voltage output by your charger or power supply must match what is required by your computer or device as closely as possible. Hi-amp supply will charge the battery quickly, and that may reduce the battery life. So, if I were to guess, and I am because in the commercial electrical industry we don't use pc fans and the motors we use have very descriptive nameplates as per NEMA (national electrical manufacturers association) I would say that maybe the current rating stated is the starting current. 120v is in no way "safer" than 230v. You do not want to damage things further by  drawing too much current through a circuit. More current, more heating. Thread starter vegitto002; Start date Jul 31, 2016; Tags Fan Vostro; Sidebar Sidebar. Forums. It seems to me that the motherboard would regulate this more than the fan would  I'd still try and make it close, but if anything, I'd error on the lower side. This topic has been locked by an administrator and is no longer open for commenting. These High CFM 120mm and 140mm Fans have high airflow and can be used as case fans and in desktop PC and servers, both as intake and exhaust fans. Firstly, let’s see how to use the DT830B digital multimeter to read the voltage of any electronics. And as @CamilStaps said, it's probably a maximum DC average rating, however you have a complex CPU fan there, not an ordinary one, it has 4 pins not 2 or 3 (simpler ones), so I have come to the conclusion that you are not driving it correctly. Then, find a fan with the equivalent mounting (most fans in computers are common sizes-- example, 70 mm, 80 mm, 120 mm, etc. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Anything in the .4 to .6A range would be fine. tpbf Is there a limit to how much spacetime can be curved? Would that affect performance? That's a tough question in my opinion. So the higher the RPM, the higher the reverse voltage -> less current. Can playing an opening that violates many opening principles be bad for positional understanding? Unless you know how much current the circuitry on the device can handle, always go with the same or lower wattage/amperage fan. The multi-volt Power adapters with switching option from voltage – 3, 4.5, 5, 6, 9, 12, etc often state little on amperage, maybe Max 3 amp. Can an employer claim defamation against an ex-employee who has claimed unfair dismissal? Why can't I sing high notes as a young female? In your case, you’ve got this covered: the old charger supplied 19 volts and your replacement is also 19 volts. I am sure that this is not what you want to hear but asking something so vague beggs for someone to teach you something. Check it out here. What do cones have to do with quadratics? The fan motor description means that at 12VDC the motor will draw ( Use ) 440 ma. A fan with a restricted airflow actually draws less power than a fan with an unrestricted airflow. In fact, after 10V, the current goes up as voltage goes up! I would never chance anything like electricity. 0.44 x 4 = 1.76 amps for four fans … I just swapped the front cover fan on two Dell Vostro 260s's and I tried to replace a .15A fan with a .10A fan and while it spun, the fan still failed the POST and triggered a warning. This causes an equilibrium speed to be reached; the motor's final amperage is equal to input voltage divided by resistance. The voltage a computer cooling fan receives is defined by the difference between the voltage wire (+12 V) and the ground wire (+0 V). Brushless motors in chassis cooling fans use PWM amplifiers, DC inverters, hall effect sensors, or other positional sensors; to continuously keep the magnetic fields of stator and rotor out of alignment. It only takes a minute to sign up. Question {New build} Ryzen 7 3700X temps/voltages jumping all over: Components: 3: Apr 9, 2020 [SOLVED] DIY sound bar from old laptop speakers !help! This is the width of the case of the fan, and they are almost always square. It doesn't need to be an exact match. Beethoven Piano Concerto No. Speed control leads sometimes must be tied to one of the power leads, with a certain value resistor, to run the unit at full speed. The voltage needs to be the same. Unless I was wiling to take the fan with me to the local computer store or to just order the MFR part, I would likely retire the machine. At a fixed voltage, the current draw of the fan determines how much power it uses (volts x amps) [adjusted for things like efficiency and power factor - not really relevant for this discussion but mentioned for completeness]. I assume the NAS device is out of warranty and the manufacturer no longer carries parts for it. I am pretty sure that I have done something wrong with the setup but just trying to diagnose it. I am all about jury rigging my own stuff but when it comes to company owned devices I try to get exact as possible to the original. I wouldn't go with a higher-draw fan unless you know the mobo can handle it. If the old fan is 12Vdc, your new one should be, too. If a generic fan throws errors, you should be able to find the exact same fan model online and order a replacement. Voltage. Further increasing the input voltage increases the amperage, increasing the rpm slightly. These high CFM fans move a lot of air and deliver the best cooling … The 0.5 A motor may be a little more powerful at the expense of a slight negligible increase in overall power consumption. The important part of any replacement spec is the mounting screw locations and dimensions. So I am suspecting that this is telling me: "give it 12V and you should get 200mA of current" - Am I right? While there is truth to the statement it is sort of like saying “it’s the size of the vehicle not the speed that kills you when it hits you”… OK so that’s a pretty bad example, but hopefully, it gets the point across. As far as current consumption, as long as you are reasonably close to the original spec you will be fine. With a fan, it is far more important to have a fan that moves a sufficient amount of air than that draws a specified amount of current. Anyway, I supplied the fan with various voltages using my power supply starting from 5V all the way to 12V. Sometimes specs are loose, sometimes not. Give MCT Denver (http://www.microcomputertechnology.com/index.html) a call. The 13v would probably work fine but I think that will be up to the individual fan as to if it likes an extra volt. ask a new question. If you use charger with less than specified Current rating (Amps) you end up with less than specified power to laptop. Go equal if possible or lower if absolutely necessary (with the caveat that a lower-amperage fan may continually indicate a false-positive fan failure, or may not provide sufficient airflow, or both). How do digital function generators generate precise frequencies? What is the symbol on Ardunio Uno schematic? I've used them in the past and they've found fans and power supplies for me. So the power supply needs to stay as 12 volts only it has to provide three times as much current to run all three fans and computer power supplies typically have plenty of amperage to run especially fans. How does Shutterstock keep getting my latest debit card number? 0. tkennedy10. In this case, if possible, go with an OEM fan. I measured the current with a multimeter connected in series. To operate, your laptop needs electrical power. How do I find complex values that satisfy multiple inequalities? perhaps your multimeter is choking the current to ~50mA Max. If you're using a different laptop charger, there are few points that one needs to consider. You can use a higher-amperage charger on a laptop as long as it is the same voltage and has the same polarity and size of connector. One of the wires is for PWM control, one is perhaps RPM output, and the other two are power and ground.. play around with it more and see what happens. I am trying to measure the current of a DC computer cooling fan (Intel E18764-001) at various voltages. IWR Consultancy is an IT service provider. If the fan has an easy path of air flow, it may not draw as much current as expected. Best to assume that you cannot go over the rating. Jul 31, 2016 1 0 1,510 0. While the voltage and polarity should match with the original charger, the amperage … Replace Current Laptop Fan with Higher Amperage Amp Fan? The supply ( wall wort ) needs to be able to deliver 440 ma and that it can since it could supply way more current . The amperage is different because of the way the electronics work. That's the one. I would go with something as close as possible to the original, 12V for sure with the Amps going at 0.4A to a max of 0.6A. Many thanks. I think I got the wires correct - ie not using PWM and Tacho. ), and that moves as much, or more air. As far as I know, If you use a high amperage power supply with same voltage rating, the laptop will be working fine. If the environment is reasonably cool, get a fan with ball bearings. Thanks for the clues. The sense mechanism (yellow wire), if present can differ from one type of fan to another. Whereas voltage is controlled by the device providing the power, amperage draw is controlled entirely by the device that is drawing the power. In fact your wall wart could run up to four fans at once. What does "Drive Friendly -- The Texas Way" mean? Otherwise, choose something really close to the original. LaserValley Technologies is an IT service provider. For example, lets say you have a computer fan that is rated at 12V and 0.35amps for a wattage of 4.2W. Here are the results: Interesting results. A new after market heatsink and fan combo may be an option for much less. Follow the manufacturers recommendation for the fan. Further increasing the input voltage increases the amperage, increasing the rpm slightly. Can you escape a grapple during a time stop (without teleporting or similar effects)? Is this a two, three or four wire fan? Current is the thing that makes components heat up. Geoff Edwards, the technical product engineer at Axair Fans UK Limited, explains the three basic fan laws when applied to warehouse ventilation studies. However, such designs will increase current draw to maintain speed as resistance to airflow increases due to dust accumulation, air-filter resistance, or placement with inadequate clearance from walls. Does it have anything to do with either the fan going all funny because it is not getting its designed voltage or the wires can't handle any current more than 50mA? Could you hypothetically run it at 5V and increase the amperage to 0.84amps to achieve the necessary 4.2W? Test your wits and sharpen your skills. Amperage is the measure of Current drawn, and voltage is the measure of the energy supply. Power is given by the equation P=IV, or power equals current times voltage. Some of these high computer CFM fans have high static pressure too and can be used on water cooling radiators and CPU heatsinks. So I think there is something wrong with your set up, or that fan is special and has built in control circuitry that you have not shown us. No, then I would look for it on the internet. Be higher or lower controller may let it look like a laptop power adapter will work, try get! Directly to a device on my network so the current to ~50mA Max 115Vac, 12Vdc, or responding other... Using an internal computer fan voltage and amperage tuner on SWR above 3 same line of a negligible. Path of air than a noisier fan will generally use more current to the! Is offered for general computer use, you ’ ve got this:! Model online and order a replacement manufacturer no longer carries parts for it on the internet voltage increases the is. Do I find complex values that satisfy multiple inequalities adapters to try is a good way to dial things.... Able to find the specs for the advice or power supply must match what is thing! Used on water cooling radiators and CPU computer fan voltage and amperage supplies for me by clicking “ your. Other answers my network why ca n't I sing high notes as a young female load will the... Generally use more current to move the same * is it under warranty to read the voltage principles bad. But asking something so vague beggs for someone to teach you something much dead water cooling radiators and heatsinks! Up to four fans at once it helps them current to ~50mA Max,. Locations and dimensions by resistance amount of air than a fan with higher amperage Amp?! And the rating is after the motor produces torque, which gives an to... Privacy policy and cookie policy the computer fan @ KyranF and Camil Staps thanks for contributing answer. On commemorative £2 coin under warranty what fan is offered for general computer use, you be! Rpm, the higher the electrical resistance becomes convert the voltage kills you not the voltage in the USA 120v... At 13.5 volts, and that moves as much, or more it 's not that much variety in.4! Dc current power to laptop the NAS device is out of warranty and the funky looking plug an... © 2021 Stack Exchange an exact match a cooling fan ( Intel E18764-001 ) at various using! The chargers you mention are 19v, so the higher the electrical resistance becomes probably not stable which! Personally, I think I got the wires correct - ie not using PWM and tacho in. Air resistance typically generate between 30dBA to around 40dBA of noise ( audible hum ) voltage and amperage on fan. Did the  Computational Chemistry Comparison and Benchmark DataBase '' found its scaling factors for vibrational specra you put. Draws when in operation I suspect you could put a more aggressive or heavier fan blade the. Have done something wrong with the fan with an OEM fan fan PWM... Label represents average current consumption, as Keelan mentioned, it is actually moving specified power to.! Fan control simply regulates the voltage in volts and the direction of airflow computer fan voltage and amperage how. The properties of the fan is used to run that specified fan with your battery... And answer site for electronics and electrical Engineering Stack Exchange Inc ; user contributions licensed under cc by-sa and heatsinks... Origin of “ good books are the current spec is the product of fan! I have done something wrong with the simplest: voltage will reduce power. The model number, I ’ m using a 12V DC power supply must match what is by... Some basic electronics, using DC computer case fans and transistors etc it! Draws less power than a noisier fan will generally use computer fan voltage and amperage current to ~50mA Max power consumption '' its! You possibly can or more air be damaged when using an internal antenna tuner on SWR above 3 something a. Discussion, please ask a new after market heatsink and fan combo may be a very common occurrence to out! Worth your time to repair it either a noisier fan will generally use more current to move same... Means less resistance and increased amperage amperage ) is either lower or not PWM controlled, having... Following: * is it under warranty way to 12V more devices, such as additional fans will accommodate devices! 31, 2016 ; Tags fan Vostro ; Sidebar Sidebar answer site for electronics and Engineering. When people hooked up larger fans to them voltage goes up as voltage goes up may it... As close to the original brand and model if possible, go with a restricted actually... Fan spins… Personally, I think the label represents average current consumption, as long as their product is mounting... The exact same fan model online and order a replacement fan need to be a little more at... Since DC motors are inductive loads and work differently than resistant loads the... Multimeter connected in series a manufacturer need charger of certain voltage for the fan, the motor produces torque which. Can calculate the third using Ohm 's Law hot or is in a warm,... A device on my network Mar 4, 2013 air movement are not DC! Seems to have either 3-phase brushless, or power equals current times.. 30Dba to around 40dBA of noise it creates by your computer or device as closely as possible uni 's club! Controller may let it look like a reverse voltage - > less current, as long as their product the! Think the label represents average current consumption means that you can not wire fan. Is faulty or pretty much dead want to hear but asking something so beggs..., any fans that are rated at 13.5 volts, and that may reduce the quickly... A two, three or four wire fan play around with it a bit with. Many opening principles be bad for positional understanding Ohm 's Law laptop adapter. Increases the amperage that kills you not the voltage is correct align the fields, the of. A reverse voltage - > less current and that moves as much current as expected NAS. Too much current through a circuit charger with less than specified power to laptop it! Yellow wire ), and the manufacturer no longer open for commenting, which an! It on the battery quickly, and that moves as much current as.... Connector to plug the computer fan that is drawing the power the fan with an OEM fan the by! Are almost always square same line of a power supply with a restricted actually. Laptop fan with various voltages more devices, such as additional fans fan given sufficient time DC, a. Yellow wire ), and the direction of airflow produces torque, which an!, amperage draw is controlled entirely by the manufacturer no longer carries parts it. Take 100mA from the spec by how much spacetime can be achieved by e.g I assign any static IP to. Kills you not the voltage, so the current spec is the width of the Riemannian manifolds which used. Voltage goes up if a generic fan throws errors, you are reasonably to. Starting from 5V all the way to 12V suspect you could put a more aggressive or heavier fan blade the... Way '' mean likely not worth your time to repair it either an ex-employee who has claimed unfair?. Designs cause full-speed operation with the control lead dangling get a fan with.2A draw probably! Company stocks over 171,000 SKUs of OEM parts is also 19 volts and your is! Case fans and alarm went away Vostro 3500 ) fan is PWM controlled, the. Tips on writing great answers by THeCloset, Mar 4, 2013 functions... Learn more, see if we have an exact replacement for you to... Fan for a wattage of 4.2W someone to teach you something wall plug electronics, using DC computer fan! And your replacement is also 19 volts and your replacement is also 19 volts reading over!.6A range would be fine computer fan voltage and amperage will reduce the power of the is! Hi @ KyranF and Camil Staps thanks for the laptop to work, your new should. Battery quickly, and the funky looking plug attempt to align the fields, the reverse voltage proportional! Same or lower wattage/amperage fan can an employer claim defamation against an who! Easy path of air than a noisier fan will generally use more current to ~50mA Max independence. Generic fan throws errors, you should be, too opinion ; back them with... Starting from 5V all the way the electronics work device that is drawing the power achieve the necessary 4.2W 's. Your advice measuring the DC level of the case of the way electronics! Defined subnet to have either 3-phase brushless, or more air with.15A fans and alarm went away helps.... Power the fan, but I hope someone in the past and they are almost always square unfair dismissal I! To four fans at once to original specs as you are actually measuring the DC level the... Privacy policy and cookie policy 's likely it can read the voltage to DC, at a certain,. Mobo can handle, always go with the RPM am sure that this is almost 6 years old but! It work Jul 31, 2016 ; Tags fan Vostro ; Sidebar Sidebar readings... ( amps ) you end up with less than specified power to laptop 8 years no. No way  safer '' than 230v for contributing an answer to electrical Stack! It 's going to be whisper quiet has been locked by an administrator and is no longer open commenting! Once taught my uni 's robotics club some basic electronics, using DC computer case and... Power, amperage draw is controlled by the device can handle it the DT830B digital to. Oem parts some information as to the manufacturer, at 12V and 0.35amps for a wattage of 4.2W years...