2SA257 PNP Transistor

The 2SA257 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the 2SA257 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SA257 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 2SA257 transistor as follows.

2SA257 Transistor Specification

Transistor Code		2SA257
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO1
Collector Power Dissipation (Maximum)	PC	0.055W
Collector-Base Voltage (Maximum)	VCB	20V
Collector Current (Maximum)	IC	0.01A
Operating Junction Temperature (Maximum)	TJ	85°C
Forward Current Transfer Ratio (hFE Value)		75
Transition Frequency	FT	35MHz
Collector Capacitance	CC	3pF

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