May 27, 2019 posted by

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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I maybe could have solved this with proper use of diodes, but after a few hours of messing around, I was still stumped. Available in To package Note: Hence it is mostly used with Arduino and other microcontrollers for logic switching. And Arduino doesn’t have high-voltage tolerant output pins. I didn’t have any luck with the transistors that got from Dafasheet 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.

Another problem you have is that the IRF has an enormous Ron of 0. I’ve attached an actual picture of what I’m working with.

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. I looked at the spec for a the IRF, and it looks datasheeg it needs 10V to switch it on.

IRFA MOSFET N-CH V 8A TOAB Vishay IR datasheet pdf data sheet FREE from

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.

You simply need to drive its gate from a NPN transistor with pull-up to 12V – however the pump might be putting dqtasheet onto the 12V rail which might be an issue.

Have you got a potentiometer to hand, maybe 1K? How to use IRFN: Then try supplying the NPN base from the arduino pin. Something rated V and A and with logic-level drive would be much more useful to you So datassheet 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.


Also, I have no idea how to properly use a PNP transistor, I attempted ir8f40a run the 12V through the PNP and use the Arduino’s 5V to turn it off an on, however this did not seem to work and I ran into all kinds datasneet crazy issues such as power seeming to run back through the gate from the collector. 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. Products may be manufactured at one of several qualified locations.

This apparently produces a 1V signal.

It also has a threshold voltage of 4V, which means it can easily driven by low voltages like 5V. 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. Also datasheeg note is that the delay function seems to work just fine if I remove the PWM pin so that it is not connected to anything.

You alo need to check the data sheet to see how well it performs with only 5v on the gate. This is its listing on Ebay: Except as expressly indicated dataasheet writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death.

Here are some examples, to illustrate what is available http: Here is the part of the code where the delay is not working, I set it up to eliminate any outside factors: Such statements are not binding statements about the suitability of products for a particular application. You might need something to increase the datasheeet voltage for lower datasheeet resistance.


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.

Meaning, they can be turned on or turned off by supplying the required Gate threshold voltage VGS.

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 found datashet “analogWrite 9, ” worked better. When you turn on a Mosfet by supplying the required voltage to the gate pin, it will remain on unless you supply 0V to the gate.

The below circuit shows how this mosfet behaves when the Gate voltage is applied 5V and not applied 0V. Please note that some Vishay documentation may still make reference to the IEC definition.

IRF840A Datasheet PDF

This is the source code that I used: I solved this by simply adding 3 more IRF’s in parallel. Speed control of motors and Light dimmers are also possible with this Mosfet since it has good switching characteristics. If not, what do you do, and again, what are the proper components to use? 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.