MRF421 NPN Transistor

The MRF421 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the MRF421 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The MRF421 transistor symbol shows an arrow from the base into the emitter. This means that the current flows from collector terminal to emitter terminal.

Circuit diagram symbol of the MRF421 transistor as follows.

MRF421 Transistor Specification

Transistor Code		MRF421
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		M174
Collector Power Dissipation (Maximum)	PC	200W
Collector-Base Voltage (Maximum)	VCB	45V
Collector-Emitter Voltage (Maximum)	VCE	20V
Collector Current (Maximum)	IC	20A
Operating Junction Temperature (Maximum)	TJ	175°C
Emitter-Base Voltage (Maximum)	VEB	3V
Forward Current Transfer Ratio (hFE Value)		10

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