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BD129 NPN Transistor

The BD129 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the BD129 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The BD129 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 BD129 transistor as follows.

Circuit diagram symbol of the BD129 transistor

BD129 Transistor Specification

Transistor Code BD129
Transistor Type BJT
Transistor Polarity NPN
Transistor Material Silicon(SI)
Package TO126
Collector Power Dissipation (Maximum) PC 20W
Collector-Base Voltage (Maximum) VCB 400V
Collector-Emitter Voltage (Maximum) VCE 350V
Collector Current (Maximum) IC 0.5A
Operating Junction Temperature (Maximum) TJ 150°C
Emitter-Base Voltage (Maximum) VEB 5V
Forward Current Transfer Ratio (hFE Value) 30

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