IRFA V N-channel A-FET / Substitute of IRF FEATURES. Avalanche Rugged Technology Rugged Gate Oxide Technology Lower Input Capacitance. THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT ? IRFA datasheet, IRFA pdf, IRFA data sheet, datasheet, data sheet, pdf , Fairchild Semiconductor, N-CHANNEL POWER MOSFET.

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At 5V volt on the gate, the IRF will pass something around 4. See the reference below: I am not sure where you are based but the IRL costs abt 60 cts where I am. Would be interested to hear how the FET holds out on 8 Amps. So, the bottom line is: You need a logic fet for that such as the IRL series.

The question is the one joe provided a solution to in an earlier question, except just as you pointed out, his solution doesnt work because the emitter voltage will be close to 12V and the base voltage from the arduino will be 5V so the transistor will close.

See the reference below:. As the can be fed with up to 18 Volt, it shouldnt be a big problem to use the to switch.

Much better to use datashet cheap Darlington transistor then. The only caveat using those AO parts, is their size: The input capacitance is best chosen as low as possible.


IRFA Hoja de datos ( Datasheet PDF ) – Advanced Power MOSFET

It doesnt look dedicated to a steppermotor though, more to drive a rgular DC motor. Datasehet i like you to do first is to detach the pic-circuit and just put 5 Volt on the entrance of yr FET circuit, via say that ohm resistor, and see if then your lamp behaves the same.

Good luck with your project. Normally the impedance of a FET is high enough to not lose any signal over that resistor. I have a hard time believing it would work properly for reasons I explained earlier, but if you say it works for you… great. Who can tell me what should I improve i my schematic? But in reality you dont need that formula as it mainly has to do with the range wherein the FET DrainSource acts as a pure resistor.

Whats about this, I have check in the datasheet and seems to work very well at TTL levels even with a lot of Amps. You may want to read up here https: Good luck, but dont hesitate to ask again shld you need further advice. Not sure though what bridge you need. I even used feedback protective diode with motor. Checking the datasheet is always a good suggestion. Notify me of new comments via email.

PDF IRF530A Datasheet ( Hoja de datos )

The irf doesnt need 20 Volt tu turn on. So no R1 and T1 from your diagram link? Should I try to use a BC for exemple to turn on the Mosfet like the schematic 3 and in this case when I put my output high the Mosfet is off, so I should put it Low to turn on my load, is it?


Looking at the curve, at a gate to source voltage of 5V the IRF is hardly turned on. If it would be just a wire i. I seem to datashfet missed your reply at first since I did not subscribe to your posts fast enough apparently: Thanks for your contribution.

I will use Arduino to dim the power acording to inputs from handlebar. But to be sure i had a question. Twitter Facebook Ird530a Google. Another thing to beware of in datasheets is Vthresh threshhold voltage.

Using the transistor to drive the gate with higher voltage solved datxsheet problem.

True is that car heated seat is not a very demanding load when properly controlled. Is this what you irf503a If for instance you want to switch 5A in a 12V circuit and you only want to waste 0.

Also easier if you need to do high side switching. Thanks Adriaan, Though technically it is a voltage divider, that is not really the function of it.