2N421 PNP Transistor

The 2N421 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the 2N421 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N421 transistor symbol shows an arrow from the emitter into the base. This means that the current flows from emitter to collector terminal.

Circuit diagram symbol of the 2N421 transistor as follows.

2N421 Transistor Specification

Transistor Code		2N421
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO3
Collector Power Dissipation (Maximum)	PC	25W
Collector-Base Voltage (Maximum)	VCB	65V
Collector-Emitter Voltage (Maximum)	VCE	45V
Collector Current (Maximum)	IC	5A
Operating Junction Temperature (Maximum)	TJ	85°C
Forward Current Transfer Ratio (hFE Value)		40
Transition Frequency	FT	0.4MHz

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