BC121 NPN Transistor

The BC121 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BC121 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BC121 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 BC121 transistor as follows.

BC121 Transistor Specification

Transistor Code		BC121
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		X16
Collector Power Dissipation (Maximum)	PC	0.09W
Collector-Base Voltage (Maximum)	VCB	5V
Collector-Emitter Voltage (Maximum)	VCE	5V
Collector Current (Maximum)	IC	0.05A
Operating Junction Temperature (Maximum)	TJ	125°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		25
Transition Frequency	FT	20MHz

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