2SD1991A NPN Transistor

The 2SD1991A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2SD1991A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SD1991A 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 2SD1991A transistor as follows.

2SD1991A Transistor Specification

Transistor Code		2SD1991A
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO92
Collector Power Dissipation (Maximum)	PC	0.4W
Collector-Base Voltage (Maximum)	VCB	60V
Collector-Emitter Voltage (Maximum)	VCE	50V
Collector Current (Maximum)	IC	0.1A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	7V
Forward Current Transfer Ratio (hFE Value)		160
Transition Frequency	FT	150MHz
Collector Capacitance	CC	3.5pF

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