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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.

Circuit diagram symbol of the AC139K transistor

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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