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AC139-4 PNP Transistor

The AC139-4 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the AC139-4 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The AC139-4 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 AC139-4 transistor as follows.

Circuit diagram symbol of the AC139-4 transistor

AC139-4 Transistor Specification

Transistor Code AC139-4
Transistor Type BJT
Transistor Polarity PNP
Transistor Material Germanium(GE)
Package TO1
Collector Power Dissipation (Maximum) PC 0.72W
Collector-Base Voltage (Maximum) VCB 32V
Collector-Emitter Voltage (Maximum) VCE 20V
Collector Current (Maximum) IC 1.2A
Operating Junction Temperature (Maximum) TJ 90°C
Emitter-Base Voltage (Maximum) VEB 10V
Forward Current Transfer Ratio (hFE Value) 40
Transition Frequency FT 1MHz
Collector Capacitance CC 80pF

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