TK21B PNP Transistor

The TK21B is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the TK21B transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The TK21B transistor symbol shows an arrow from the emitter into the base. This means that the current flows from emitter to collector terminal.

Circuit diagram symbol of the TK21B transistor as follows.

TK21B Transistor Specification

Transistor Code		TK21B
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		X18
Collector Power Dissipation (Maximum)	PC	0.2W
Collector-Base Voltage (Maximum)	VCB	30V
Collector-Emitter Voltage (Maximum)	VCE	20V
Collector Current (Maximum)	IC	0.1A
Operating Junction Temperature (Maximum)	TJ	75°C
Emitter-Base Voltage (Maximum)	VEB	30V
Forward Current Transfer Ratio (hFE Value)		15
Transition Frequency	FT	1MHz

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More Transistors Datasheets in X18 Package

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