BC138 NPN Transistor

The BC138 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BC138 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BC138 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 BC138 transistor as follows.

BC138 Transistor Specification

Transistor Code		BC138
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO5
Collector Power Dissipation (Maximum)	PC	0.3W
Collector-Base Voltage (Maximum)	VCB	60V
Collector-Emitter Voltage (Maximum)	VCE	40V
Collector Current (Maximum)	IC	1A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		35
Transition Frequency	FT	40MHz
Collector Capacitance	CC	25pF

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