2N1142 PNP Transistor

The 2N1142 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the 2N1142 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N1142 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 2N1142 transistor as follows.

2N1142 Transistor Specification

Transistor Code		2N1142
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO5
Collector Power Dissipation (Maximum)	PC	0.3W
Collector-Base Voltage (Maximum)	VCB	30V
Collector Current (Maximum)	IC	0.1A
Operating Junction Temperature (Maximum)	TJ	100°C
Forward Current Transfer Ratio (hFE Value)		10
Transition Frequency	FT	300MHz
Collector Capacitance	CC	3pF

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