IRFA Transistor Datasheet, IRFA Equivalent, PDF Data Sheets. MOSFET. Parameters and Characteristics. Electronic Component Catalog. Vishay IRFA MOSFET are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Vishay IRFA MOSFET. IRFA. TOAB. SMPS MOSFET. HEXFET. ®. Power MOSFET l Switch Mode Power Supply (SMPS) l Uninterruptable Power Supply.

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Both lowered resistance, but still kept maybe 2k ohms. If so, what are proper components to use? When a gate voltage is applied these pins gets closed.

Repetitive rating; pulse width limited by maximum junction temperature see fig. So my next question is what is the proper method for giving a motor more and less power? Products may be manufactured at one of several qualified locations.

Current flows in through Drain. The water pump is rated at 12V and 2. I looked at the spec for a the IRF, and it looks like it needs 10V to switch it on. Speed control of motors and Light dimmers are also possible with this Mosfet since it has good switching characteristics. To the maximum extent permitted by applicable law, Vishay disclaims i any and all liability arising out of the application or use of any product, ii any and all liability, including without limitation special, consequential or incidental damages, and iii any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability.

Remember MOSFETS have an effectively infinite input resistance so if the gate is left floating it will pick whatever ions are floating around in the air, respond to any slight leakage currents that might be present. Tying the gate to the source with a high value resistor is a good plan as people have mentioned, such as 1Mohm, so that its safely off until setup has run.


You alo need to check the data sheet to see how well it performs with only 5v on the gate. My problem is that it never seems to be in an off state, as soon as I connect the power, the pump turns on and the MOSFET gets really hot. Do you do what I did and turn the power on and off really fast? So if you are looking for a Mosfet to switch applications that consume high current with some logic level devices then this Mosfet will be a perfect choice for you.

Current flows out through Source. Such statements are not binding statements about the suitability of products for a particular application.

This mosfet can drive loads upto 23A and can support peak current upto A. Drain Current 12 V 0. Meaning, they can be turned on or turned off by supplying the required Gate threshold voltage VGS. Product names and markings noted herein may be trademarks of their respective owners.

IRFA datasheet, Pinout ,application circuits Mosfet TO & SMD Power MOSFETs

To tackle this we should use a current limiting capacitor, I have a used a value of here. I combed over the code because oftentimes problems like this are due to coding errors, but I have not been able to find any problems in the code.

If you are designing a PCB or Perf board with this component then the following picture from the 2N Datasheet will be useful to know its package type and dimensions. I went to Radio Shack today and picked up a few things that I thought would be helpful and help get me ahead of where I was yesterday: If not, what do you do, and again, what are the proper components to use?


This apparently produces a 1V signal.

Irf840a datasheet pdf

I thought I’d post an update since everyone was so helpful. It also has a threshold voltage of 4V, which means it can easily driven by low voltages like 5V. This happens even if I don’t even have the Ardunio hooked up. How to use IRFN: Once I did these things, the resistance seemed to drop to zero when I applied 5V to the gate.

IRFA Datasheet(PDF) – International Rectifier

The below circuit shows irf840s this mosfet behaves when the Gate voltage is applied 5V and not applied 0V. To avoid this problem we should always use a pull-down resistor R1here I have used a value of 10k. MarkT Brattain Member Posts: Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Use Google Search box in upper right side of this page. I solved this by simply adding 3 more IRF’s in parallel. Here are iff840a examples, to illustrate what is available http: I didn’t have any luck with the transistors irff840a got from Radio Shack, I actually just ended up getting the original IRFs that I had to work by using 4 in parallel to prevent them from overheating.

Since this an N-Channel mosfet the load that has to be switched in this case a motor should always be connected above the drain pin. Perhaps I should post this in a separate topic, but it is a continuation of the project addressed above and may relate to the way that I am using power.