2N4057 NPN Transistor

The 2N4057 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2N4057 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N4057 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 2N4057 transistor as follows.

2N4057 Transistor Specification

Transistor Code		2N4057
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO202
Collector Power Dissipation (Maximum)	PC	4W
Collector-Base Voltage (Maximum)	VCB	150V
Collector-Emitter Voltage (Maximum)	VCE	150V
Collector Current (Maximum)	IC	0.1A
Operating Junction Temperature (Maximum)	TJ	150°C
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	15MHz
Collector Capacitance	CC	12pF

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