SFT221 PNP Transistor

The SFT221 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the SFT221 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The SFT221 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 SFT221 transistor as follows.

SFT221 Transistor Specification

Transistor Code		SFT221
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Germanium(GE)
Package		TO5
Collector Power Dissipation (Maximum)	PC	0.225W
Collector-Base Voltage (Maximum)	VCB	30V
Collector-Emitter Voltage (Maximum)	VCE	24V
Collector Current (Maximum)	IC	0.25A
Operating Junction Temperature (Maximum)	TJ	85°C
Emitter-Base Voltage (Maximum)	VEB	15V
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	0.5MHz

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