TIP121 NPN Transistor

The TIP121 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the TIP121 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The TIP121 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 TIP121 transistor as follows.

TIP121 Transistor Specification

Transistor Code		TIP121
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO220
Collector Power Dissipation (Maximum)	PC	65W
Collector-Base Voltage (Maximum)	VCB	80V
Collector-Emitter Voltage (Maximum)	VCE	80V
Collector Current (Maximum)	IC	5A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		1000

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