MJ421 NPN Transistor

The MJ421 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the MJ421 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The MJ421 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 MJ421 transistor as follows.

MJ421 Transistor Specification

Transistor Code		MJ421
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO5
Collector Power Dissipation (Maximum)	PC	0.8W
Collector-Base Voltage (Maximum)	VCB	350V
Collector-Emitter Voltage (Maximum)	VCE	325V
Collector Current (Maximum)	IC	0.1A
Operating Junction Temperature (Maximum)	TJ	175°C
Emitter-Base Voltage (Maximum)	VEB	6V
Forward Current Transfer Ratio (hFE Value)		25
Transition Frequency	FT	15MHz
Collector Capacitance	CC	12pF

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