BD142-4 NPN Transistor

The BD142-4 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BD142-4 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BD142-4 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 BD142-4 transistor as follows.

BD142-4 Transistor Specification

Transistor Code		BD142-4
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO3
Collector Power Dissipation (Maximum)	PC	117W
Collector-Base Voltage (Maximum)	VCB	50V
Collector-Emitter Voltage (Maximum)	VCE	40V
Collector Current (Maximum)	IC	45A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		20
Transition Frequency	FT	0.7MHz

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