ST40 NPN Transistor

The ST40 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the ST40 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The ST40 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 ST40 transistor as follows.

ST40 Transistor Specification

Transistor Code		ST40
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO5
Collector Power Dissipation (Maximum)	PC	0.2W
Collector-Base Voltage (Maximum)	VCB	45V
Collector-Emitter Voltage (Maximum)	VCE	45V
Collector Current (Maximum)	IC	0.025A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	2V
Forward Current Transfer Ratio (hFE Value)		17
Transition Frequency	FT	15MHz
Collector Capacitance	CC	5pF

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