2N2121 NPN Transistor

The 2N2121 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2N2121 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N2121 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 2N2121 transistor as follows.

2N2121 Transistor Specification

Transistor Code		2N2121
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO83
Collector Power Dissipation (Maximum)	PC	250W
Collector-Base Voltage (Maximum)	VCB	300V
Collector-Emitter Voltage (Maximum)	VCE	300V
Collector Current (Maximum)	IC	30A
Operating Junction Temperature (Maximum)	TJ	175°C
Emitter-Base Voltage (Maximum)	VEB	15V
Forward Current Transfer Ratio (hFE Value)		10
Transition Frequency	FT	0.5MHz

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