KSD1221 NPN Transistor

The KSD1221 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the KSD1221 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The KSD1221 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 KSD1221 transistor as follows.

KSD1221 Transistor Specification

Transistor Code		KSD1221
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO252
Collector Power Dissipation (Maximum)	PC	20W
Collector-Base Voltage (Maximum)	VCB	60V
Collector-Emitter Voltage (Maximum)	VCE	60V
Collector Current (Maximum)	IC	3A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	7V
Forward Current Transfer Ratio (hFE Value)		60
Transition Frequency	FT	3MHz
Collector Capacitance	CC	70pF

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