2N638B PNP Transistor

The 2N638B is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the 2N638B transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N638B 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 2N638B transistor as follows.

2N638B Transistor Specification

Transistor Code		2N638B
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO3
Collector Power Dissipation (Maximum)	PC	60W
Collector-Base Voltage (Maximum)	VCB	80V
Collector-Emitter Voltage (Maximum)	VCE	80V
Collector Current (Maximum)	IC	5A
Operating Junction Temperature (Maximum)	TJ	90°C
Forward Current Transfer Ratio (hFE Value)		20
Transition Frequency	FT	0.5MHz

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