IRFB V N-channel B-FET / Substitute of IRF & IRFA. These N- Channel enhancement mode power field effect transistors are produced using. IRFB datasheet, IRFB pdf, IRFB data sheet, datasheet, data sheet, pdf , Fairchild Semiconductor, V N-Channel MOSFET. IRFB Datasheet PDF Download – V N-Channel MOSFET, IRFB data sheet.

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I found that “analogWrite 9, ” worked better. Then try supplying the NPN base from the arduino pin.

When I first heard of MOSFETs and saw some pictures, I said there is no way they can carry the load that they are rated at, it takes thick wire to carry significant amounts of power, not these vatasheet little pins Product names and markings noted herein may be trademarks of their respective owners. I thought I’d post an update since everyone was so helpful.

IRFB Datasheet –

I looked at the spec for a the IRF, and it looks like it needs 10V to switch it on. Do you do what I did and turn the power on and off really fast?

For definitions of compliance please see www. Repetitive rating; pulse width limited by maximum junction temperature. 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. 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.

Please note that some Vishay documentation may still make reference to the IEC definition. The water pump is rated at 12V and 2. 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 solved this by simply adding 3 more IRF’s in parallel. Have you got a potentiometer to hand, maybe 1K?


Both lowered resistance, but still kept maybe 2k ohms. Also of note is that the delay function seems to work just fine if I remove the PWM irf840g so that it is not connected to anything.

And Arduino doesn’t have high-voltage tolerant output pins. I’m having some very weird issues with using PWM analogWrite and the delay function.

Once I did these things, the resistance seemed to drop to zero when I applied 5V to the gate. Vishay makes no warranty, representation irt840b guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product.

Index of /datasheets/IR

MarkT Brattain Member Posts: 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. Products may be manufactured at one dtasheet several qualified locations. Here are some examples, to illustrate what is available http: You might need something to increase the gate voltage for lower internal resistance.

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. 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. Also, I have no idea how to properly use a PNP transistor, I attempted irf840v 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.

I maybe could have solved this with proper use of diodes, but after a few hours of messing around, I was still stumped. If so, what are proper components to use? 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 datasheeet hot. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.


I didn’t have 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.

You alo need to check the data sheet to see how well it performs with only 5v on the gate.

The last problem that I had was that the thing would overheat pretty bad after a just a few moments of the motor being on. This apparently produces a 1V signal.

IRFB datasheet & applicatoin notes – Datasheet Archive

If not, what do you do, and again, what are the proper components to use? This is its listing on Ebay: Use Google Search box in upper right side satasheet this page.

Something rated V and A and with logic-level drive would be much more useful to you Gate-to-Source Voltage Document Number: 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: I’ve attached an actual datasheft of what I’m working with. This happens even if I don’t even have the Ardunio hooked up.

A, Jun Document Number: You 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. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Such statements are not binding statements about the suitability of products for a particular application.