BUL129D NPN Transistor

The BUL129D is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BUL129D transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BUL129D 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 BUL129D transistor as follows.

BUL129D Transistor Specification

Transistor Code		BUL129D
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO220
Collector Power Dissipation (Maximum)	PC	65W
Collector-Base Voltage (Maximum)	VCB	800V
Collector-Emitter Voltage (Maximum)	VCE	450V
Collector Current (Maximum)	IC	4A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	9V
Forward Current Transfer Ratio (hFE Value)		4

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