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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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Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. I maybe could have solved this with proper use of diodes, but after a few hours of messing around, I was still stumped. Have you got a potentiometer to hand, maybe 1K? Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.

Gate-to-Source Voltage Document Number: 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.

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.

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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. Repetitive rating; pulse width limited by maximum junction temperature.

IRF840B PDF Datasheet浏览和下载

I looked at the spec for a the IRF, and it looks like it needs 10V to switch it on. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Do you do what I did and turn the power on and off really fast?

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. Here is the part of the code where the delay is not working, I set it up to eliminate any outside factors: This is the source code that I used: Use Google Search box in upper right side of this dataasheet.

Once I did these things, the resistance seemed to drop to zero when I applied 5V to the gate. This is its listing on Ebay: Something rated V and A and with logic-level drive would be much more useful to you The water pump is rated at 12V and 2. 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.


Here are some examples, to illustrate what is available http: Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. 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: A, Jun Document Number: I thought I’d post an update since everyone was so helpful.

Such statements are not binding statements about the suitability of products for a particular application. So my next question is what is the proper method for giving a motor more and less power? 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.

If so, what are proper components to use?

Trouble with MOSFET

You might need something to increase the gate voltage for lower internal resistance. I found that “analogWrite 9, ” worked better. Both lowered resistance, but still kept maybe 2k ohms.

Please note that some Vishay documentation may still make reference to the IEC definition.