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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Speed control of motors and Light dimmers are also possible with this Mosfet since it has good switching characteristics.

The below circuit shows how this mosfet behaves when the Gate voltage is applied 5V and not applied 0V. This mosfet can drive loads upto 23A and can support datasheett current upto A.

Also, I have no idea how to properly use a PNP transistor, I attempted to 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 of crazy issues such as power seeming to run back through the gate from the collector.


Both lowered resistance, but still kept maybe 2k ohms. The water pump is rated at 12V and 2. Meaning, they can be turned on or turned off by supplying the required Gate threshold voltage VGS.

I found that “analogWrite 9, ” worked better. Once I did these things, the resistance datasbeet to drop to zero when I applied 5V to the gate.

Mosfet TO-220 & SMD220 Power MOSFETs

The last problem that I had was that the thing would ir8f40a pretty bad after a just a few moments of the motor being on. So my next question is what is the proper method for giving a motor more and less power?

Xatasheet simply need to drive its gate from a NPN transistor with pull-up to 12V – however the pump might be putting spikes onto the 12V rail which might be an issue. My problem is that it never seems dataxheet be in an off state, as soon as I connect the power, the pump turns on and the MOSFET gets really hot.


TL — Programmable Reference Voltage. I didn’t dattasheet any luck with the transistors that 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. If not, what do you do, and again, what are the proper components to use? I’m having some very weird issues with using PWM analogWrite and the delay function. When a gate voltage is applied these pins gets closed.

Irf840a datasheet pdf

Please note that some Vishay documentation may still make reference to the IEC definition. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. You alo need to check the data sheet to see how well it performs with only 5v on the gate. Except as expressly indicated in 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.

I thought I’d post an update since everyone was so helpful.

Trouble with MOSFET

Also of note is that the delay function seems to work just fine if I remove the PWM pin so that datawheet is not connected to anything. Here is the part of the code igf840a the delay is not working, I set it up to eliminate any outside factors: Submitted by webmaster on 8 December 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.


Available in To package Note: Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.

This is its listing on Ebay: This happens even if I don’t even have the Ardunio hooked up. Do you do what I did and turn the power on and off really fast?

It also has a threshold voltage of 4V, which means it can easily driven by low voltages like 5V. Use Google Search box in upper right side of this page. 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. How to use IRFN: Repetitive rating; pulse width limited by maximum junction temperature see fig. Current flows in through Drain. This is the source code that I used: MarkT Brattain Member Posts: 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.

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

IRFA MOSFET Datasheet pdf – Equivalent. Cross Reference Search

To tackle this we should use a current limiting capacitor, I have a used a value of here. I maybe could have solved this with proper use of diodes, but after a few hours of messing around, I was still stumped. Product names and markings noted herein may be trademarks of their respective owners. Have you got a irt840a to hand, maybe 1K?