2N21A PNP Transistor

The 2N21A is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the 2N21A transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N21A 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 2N21A transistor as follows.

2N21A Transistor Specification

Transistor Code		2N21A
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO22
Collector Power Dissipation (Maximum)	PC	0.12W
Collector-Base Voltage (Maximum)	VCB	100V
Collector-Emitter Voltage (Maximum)	VCE	100V
Collector Current (Maximum)	IC	0.04A
Operating Junction Temperature (Maximum)	TJ	85°C
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	1MHz

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