2SD1221O NPN Transistor

The 2SD1221O is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2SD1221O transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SD1221O 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 2SD1221O transistor as follows.

2SD1221O Transistor Specification

Transistor Code		2SD1221O
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO251
Collector Power Dissipation (Maximum)	PC	1W
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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