2SD1821A NPN Transistor

The 2SD1821A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2SD1821A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SD1821A 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 2SD1821A transistor as follows.

2SD1821A Transistor Specification

Transistor Code		2SD1821A
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		SOT23
Collector Power Dissipation (Maximum)	PC	0.9W
Collector-Base Voltage (Maximum)	VCB	185V
Collector Current (Maximum)	IC	0.05A
Operating Junction Temperature (Maximum)	TJ	150°C
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	150MHz

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