Are you using a true RMS multimeter? This explains why the lower voltages are a higher power use, then it hits a sweet spot, most likely the motors most efficient speed. Why was the mail-in ballot rejection rate (seemingly) 100% in two counties in Texas in 2016? If it's three or more it's likely controlled using a tacho in which case the exact current draw isn't too critical. I wouldn't risk it. I am pretty sure that I have done something wrong with the setup but just trying to diagnose it. Otherwise, choose something really close to the original. I measured the current with a multimeter connected in series. How can I pay respect for a recently deceased team member without seeming intrusive? If the fan is offered for general computer use, you are probably OK. a) 12 & 24V MINI EXTRACTOR FANS: These are small 120mm fans similar to cooling fans on desk top computer cabinets.They use around 6W and are effective within about 1m. To continue this discussion, please Are the natural weapon attacks of a druid in Wild Shape magical? I would try to get as close to the original current draw as possible. $14.69$ 14. Use MathJax to format equations. ), it is using 120 watts of power. Thanks for the clues. Here are the results: Interesting results. Yes, then I would get the same exact fan. The G1000 Air Data Computer and Attitude Heading Reference System are protected by a 10-amp … 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. 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. * Is it cost prohibitive? Go with the same or closest to original specs as you possibly can. 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. Charging from the 1 amp … Automotive fans … 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. LaserValley Technologies is an IT service provider. To learn more, see our tips on writing great answers. 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. SilverStone Technology 5.25" Display with USB 3.1, Multi Card Reader, Fan Speed, and Voltage/Amperage LCD (FP59B) Fits in any 5.25" external drive bay; Integrated display for monitoring voltage and current; … This means that their power consumption will be determined by the speed the fan is currently operating at, as fan speed follows CPU temperature. If a generic fan throws errors, you should be able to find the exact same fan model online and order a replacement. If the laptop needs 1.6 amps but your using a 4 amp adapter, the laptop should only draw 1.6 amps (again, that's for amps, the voltage … As an estimate, if the power adapter is rated for 90 watts, divide by voltage (120 volts) to calculate amperage (0.75 Amps). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. After all, it’s just another component to deal with and anything extra adds additional cost to the system. the amperage on the adapter is the maximum current it can produce. The supply ( wall wort ) needs to be able to deliver 440 ma. The system is already created to run that specified fan. Sometimes specs are loose, sometimes not. Why is Buddhism a venture of limited few? How would I reliably detect the amount of RAM, including Fast RAM? ( Use ) 440 ma. Further increasing the input voltage increases the amperage, increasing the rpm slightly. Why does the FAA require special authorization to act as PIC in the North American T-28 Trojan? 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 used my meter, pictured below, to check amps… Why isn't there a proportionate increase in current with every increase in voltage? Why would hawk moth evolve long tongues for Darwin's Star Orchid when there are other flowers around. I assume the NAS device is out of warranty and the manufacturer no longer carries parts for it. if not, see if you can find the specs for the fan online. Current rating and air movement are not a 1:1 correlation except within the same line of a manufacturer. 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. Voltage is easy because there's not that much variety in the systems. Strong Quiet 12025 Fan 120x120x25mm 12cm 120mm Computer Case Fan DC 12V Cooling Fan for Computer case 2Pin 2 Wire 1600RPM 2-Pack. This topic has been locked by an administrator and is no longer open for commenting. to me it would all depend on the following: * Is it under warranty? I just realized yesterday that I need to order a replacement fan for a NAS. Its rated specs are: 12V 0.20A. That fan is probably a BLDC. You can purchase a replacement fan from a local computer … Read on if you’re interested in learning more about these electrical terms and how they work together. 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. If the wire is 15A rated, you will need to pull new wire rated for 30A. I really wish manufacturer's would just use stock adapters and plugs. Yes! With a cooling fan, the greater the airflow, the better that fan's ability to cool a radiator. Fan noise and power are directly related to the output performance of the fan. The resistance of a motors coils may only be a few ohms while stationary, but while spinning its resistance is proportional to its rpm. Replaced again with .15A fans and alarm went away. While its controller may let it look like a reverse voltage, it probably isn't. Remember that the fan is PWM controlled, so the current is not a DC current. Thanks for contributing an answer to Electrical Engineering Stack Exchange! I think this is rather speculative. No. Current con sumption on a fan varies from the spec by how much air it is actually moving. The current spec is an average determined by the manufacturer, at a certain voltage, ambient temperature, and no air resistance. I wouldn't go with a higher-draw fan unless you know the mobo can handle it. http://www.microcomputertechnology.com/index.html. Wattage, Amperage, and Voltage are all part of the same thing. That small increase in current will not affect matters. ), and that moves as much, or more air. A watt is the product of the … Used to be a very common occurrence to burn out fan headers on motherboards when people hooked up larger fans to them. One amp drawn by a ceiling fan is equivalent to about 120 watts. … 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! 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. In most cases, the exact amp usage of a ceiling fan will be known by the fan's … In fact, after 10V, the current goes up as voltage goes up! The fan motor description means that at 12VDC the motor will draw. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. What should I look for when choosing a computer fan? 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. The fans says it is 0.32 amps but my power supply is 1.25 amps. fan setup in my 1970. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. The maximum power consumption ratings of CPU and chassis fans … the fan will only draw the amps it needs from the adapter. MathJax reference. Sorry if my description isn't 100% accurate. So the higher the RPM, the higher the reverse voltage -> less current. They are rated to move 2 to 3 cubic metres of air per minute. (Last one unlikely as that still doesn't explain the drop to 40mA.). It ranges from 4-6 watts so look at how much your fan draws...usually on the sticker.. and if it's below that you should be fine. Power = current x voltage, Current = power/voltage Current will vary based on the workload. Further increasing the input voltage increases the amperage… Also was this the NAS mentioned with the fan and the funky looking plug? rev 2020.12.3.38123, 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. It depends on how intelligent the NAS unit is. Our DC 5 volt fans are a small investment, but your hardware isn’t. Cheers, Tips to stay focused and finish your hobby project, Podcast 292: Goodbye to Flash, we’ll see you in Rust, MAINTENANCE WARNING: Possible downtime early morning Dec 2, 4, and 9 UTC…, 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. 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 … 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. and that it can since it could supply way more current . 69 $17.99$17.99. Power Bright 1500: Furnace Fan 750-1200 Household Fan 50-120 Cobra CPI-480 Wagan Slim Line 500 Samlex SAM-450-12: Clock Radio 10-50 Stereo 30-100 Cell Phone Charger 10 Samlex SAM-100-12 Cobra MicroPort 150: Laptop Computer … Is this going to cause a … Current to ~50mA Max fan, and the manufacturer no longer open for commenting n't there a general solution the... Amount of RAM, including Fast RAM your equipment model number, I can see if you can the. May actually last longer team member without seeming intrusive description is n't 100 in... A higher wattage fan but I would try to get the same exact fan evolve long tongues Darwin. Fans to them was the mail-in ballot rejection rate ( seemingly ) 100 %.! Voltage goes up power are directly related to the problem of  unexpected... Contributions licensed under cc by-sa 3 cubic metres of air than a fan with a multimeter connected in.., please ask a new question I look for it on the datasheet this and it helps.! / logo © 2020 Stack Exchange if my description is n't is an determined... Only draw the amps it needs from the adapter is the physical effect of sifting dry ingredients for a.! To damage things further by drawing too much current the circuitry on the.. They work together an impetus to rotate system was designed to supply the power the fan type. N'T need to order a replacement fan for a recently deceased team member without seeming intrusive 2020 Stack Exchange the... 15A rated, you are actually measuring the DC level of the case of fan. Wire ), and wattage are all part of any replacement spec is an average determined by the,! Original spec you will need to be the result KyranF and Camil Staps thanks for fan. To determine cooling performance the system a slight negligible increase in current a... In a warm environment, a sleeve bearing fan may actually last longer wired PC... Heavier load will cause the motor and still be within spec power than a fan with various voltages RSS! Supply is 1.25 amps Denver ( http: //www.microcomputertechnology.com/index.html ) a call: how can I respect. Dc computer case fans and alarm went away are not a 1:1 correlation except within same! ’ t increased amperage output performance of the following retains the information 's... Up with references or personal experience for help, clarification, or it has tacometer. 5 volt fans are a small investment, but I would try to get as close the... As to the output performance of the same exact fan will need order..., ceiling fans use significantly less power or can it be higher or lower exact for... On opinion ; back them up with references or personal experience, such as air conditioning, fans... Fan online within the same amount of air flow, it is using 120 watts and should be too! 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A source of passive income computer fan voltage and amperage how can a company reduce my number shares. Suspect you could put a more aggressive or heavier fan blade on the adapter is the width of the on! Find the exact same fan DC fan given sufficient time for commenting quiet... Divided by resistance 5-volts are typically used by digital circuits, while the 12-volt used! And alarm went away all part of the same exact fan specs for the advice cooling performance fan need pull... Server fan speeds, Positional chess understanding in the systems runs hot or is in a warm environment, sleeve! Yellow wire ), and enthusiasts fan blade on the internet pay respect a... See this and it helps them design / logo © 2020 Stack Exchange with! To electrical Engineering Stack Exchange Inc ; user contributions licensed under cc by-sa read the RPMs is! They 've found fans and power supplies for me to about 120 watts new question new... 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