BD249D NPN Transistor

The BD249D is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BD249D transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BD249D 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 BD249D transistor as follows.

BD249D Transistor Specification

Transistor Code		BD249D
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO218
Collector Power Dissipation (Maximum)	PC	125W
Collector-Base Voltage (Maximum)	VCB	160V
Collector-Emitter Voltage (Maximum)	VCE	120V
Collector Current (Maximum)	IC	40A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	5V
Forward Current Transfer Ratio (hFE Value)		8
Transition Frequency	FT	3MHz

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