K2121B NPN Transistor

The K2121B is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the K2121B transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The K2121B 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 K2121B transistor as follows.

K2121B Transistor Specification

Transistor Code		K2121B
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	12V
Operating Junction Temperature (Maximum)	TJ	175°C
Forward Current Transfer Ratio (hFE Value)		20
Transition Frequency	FT	1700MHz
Collector Capacitance	CC	1pF

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