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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This apparently produces a 1V signal. Such statements are not binding statements about the suitability of products for a particular application. 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. A, Jun Document Number: Another problem you have is that the IRF has an enormous Ron of 0.

MarkT Brattain Member Posts: I’d suggest a 1K from 12V to a capacitor to ground. Have you got a potentiometer to hand, maybe 1K?

IRF840B Даташит

So my next question is what is the proper method for giving a motor more and less power? 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.

I’ve attached an actual picture of what I’m working with. 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 solved this by simply adding 3 more IRF’s in parallel.

This is the source code that Dataasheet used: No license, datasjeet or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.


Gate-to-Source Voltage Document Number: Then try supplying the NPN base from the arduino pin. When Irrf840b first heard of MOSFETs and saw some pictures, I said there is no way they can carry the load that they are datasjeet at, it takes thick wire to carry significant amounts of power, not these tiny little pins I maybe could have solved this with proper use of diodes, but after a few hours of messing around, I was still stumped.

Also of 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. I found that “analogWrite 9, ” worked better.

IRFB Datasheet, PDF – Alldatasheet

I thought I’d post an update since everyone was so helpful. 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. Perhaps Irf840v 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. 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.

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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. I didn’t have any luck with the transistors that got from Radio Shack, I actually just satasheet 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.


Customers using or selling Vishay products not datashet indicated for use in such applications do so at their own risk. And Arduino doesn’t have high-voltage tolerant output pins.

Both lowered resistance, but still kept maybe 2k ohms. Here is the part of the code where the delay is not working, I set it up to eliminate any outside factors: Something rated V and A and with logic-level drive would be much more useful to you 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.

I looked at the spec for a the IRF, and it looks like it needs 10V to switch it on. For definitions of compliance please see www. Here are some examples, to illustrate what is available http: Products may be manufactured at one of several qualified locations.

IRFB 데이터시트(PDF) – Fairchild Semiconductor

Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. I’m having some very weird issues with using PWM analogWrite and the delay function. This happens even if I don’t even have the Ardunio hooked up.