MOSFET, plus mounting hardware, screw, nut, washer & nylon isolation washer, thermal tape backing to heat sink. For those who go over 30 amps and fry the Mosfet, we have replacements. For the PWM MC-12 circuit. Some try adding another Mosfet ( hooked up in parallel) to take it up to 40 amps. This Mosfet can take up to 100 Volts and 347º

We also sell just the Mosfet for $4.00

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