2SD1991 NPN Transistor

The 2SD1991 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2SD1991 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SD1991 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 2SD1991 transistor as follows.

2SD1991 Transistor Specification

Transistor Code		2SD1991
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		SOT33
Collector Power Dissipation (Maximum)	PC	0.4W
Collector-Base Voltage (Maximum)	VCB	30V
Collector Current (Maximum)	IC	0.1A
Operating Junction Temperature (Maximum)	TJ	150°C
Forward Current Transfer Ratio (hFE Value)		40

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