SD409 NPN Transistor

The SD409 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the SD409 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The SD409 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 SD409 transistor as follows.

SD409 Transistor Specification

Transistor Code		SD409
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO220
Collector Power Dissipation (Maximum)	PC	90W
Collector-Emitter Voltage (Maximum)	VCE	120V
Collector Current (Maximum)	IC	10A
Forward Current Transfer Ratio (hFE Value)		25

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