3N121 NPN Transistor

The 3N121 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 3N121 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 3N121 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 3N121 transistor as follows.

3N121 Transistor Specification

Transistor Code		3N121
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO72
Collector Power Dissipation (Maximum)	PC	0.2W
Collector-Base Voltage (Maximum)	VCB	30V
Collector-Emitter Voltage (Maximum)	VCE	30V
Collector Current (Maximum)	IC	0.01A
Operating Junction Temperature (Maximum)	TJ	175°C
Transition Frequency	FT	40MHz
Collector Capacitance	CC	10pF

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