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IRFZ44N N-Channel Power MOSFET

The IRFZ44N is a N-channel MOSFET with a high drain current of 49A and low Rds value of 17.5 mΩ. It also has a low threshold voltage of 4V at which the MOSFET will start conducting. Hence it is commonly used with microcontrollers to drive with 5V.

IRF740 N-Channel Power Mosfet

The IRF740 is an N-Channel Power MOSFET which can switch loads upto 400V.   Pin Configuration

IRF520 N-Channel Power MOSFET

The IRF520 is a Power Mosfet with 9.2A collector current and 100V breakdown voltage. The mosfet has a low gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for switching high current loads.  
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