2SA78 PNP Transistor

The 2SA78 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the 2SA78 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SA78 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 2SA78 transistor as follows.

2SA78 Transistor Specification

Transistor Code		2SA78
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO44-2
Collector Power Dissipation (Maximum)	PC	0.125W
Collector-Base Voltage (Maximum)	VCB	40V
Collector Current (Maximum)	IC	0.4A
Operating Junction Temperature (Maximum)	TJ	75°C
Emitter-Base Voltage (Maximum)	VEB	2V
Forward Current Transfer Ratio (hFE Value)		70
Transition Frequency	FT	12MHz
Collector Capacitance	CC	4pF

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