2N439 NPN Transistor

The 2N439 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2N439 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N439 transistor symbol shows an arrow from the base into the emitter. This means that the current flows from collector terminal to emitter terminal.

Circuit diagram symbol of the 2N439 transistor as follows.

2N439 Transistor Specification

Transistor Code		2N439
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Germanium(GE)
Package		TO5
Collector Power Dissipation (Maximum)	PC	0.1W
Collector-Base Voltage (Maximum)	VCB	25V
Collector Current (Maximum)	IC	0.3A
Operating Junction Temperature (Maximum)	TJ	85°C
Emitter-Base Voltage (Maximum)	VEB	25V
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	3MHz
Collector Capacitance	CC	18pF

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