AC139K PNP Transistor

The AC139K is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the AC139K transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The AC139K 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 AC139K transistor as follows.

AC139K Transistor Specification

Transistor Code		AC139K
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO1
Collector Power Dissipation (Maximum)	PC	0.42W
Collector-Base Voltage (Maximum)	VCB	40V
Collector-Emitter Voltage (Maximum)	VCE	25V
Collector Current (Maximum)	IC	1.2A
Operating Junction Temperature (Maximum)	TJ	90°C
Emitter-Base Voltage (Maximum)	VEB	3V
Forward Current Transfer Ratio (hFE Value)		50
Transition Frequency	FT	0.8MHz
Collector Capacitance	CC	80pF

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