4128D NPN Transistor

The 4128D is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 4128D transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 4128D 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 4128D transistor as follows.

4128D Transistor Specification

Transistor Code		4128D
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO-126
Collector Power Dissipation (Maximum)	PC	40W
Collector-Base Voltage (Maximum)	VCB	350V
Collector-Emitter Voltage (Maximum)	VCE	200V
Collector Current (Maximum)	IC	5A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	7V
Forward Current Transfer Ratio (hFE Value)		8
Transition Frequency	FT	4MHz

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