KST4125 PNP Transistor

The KST4125 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the KST4125 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The KST4125 transistor symbol shows an arrow from the emitter into the base. This means that the current flows from emitter to collector terminal.

Circuit diagram symbol of the KST4125 transistor as follows.

KST4125 Transistor Specification

Transistor Code		KST4125
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Silicon(SI)
Package		SOT-23
Transistor SMD Code		ZD
Collector Power Dissipation (Maximum)	PC	0.35W
Collector-Base Voltage (Maximum)	VCB	30V
Collector-Emitter Voltage (Maximum)	VCE	30V
Collector Current (Maximum)	IC	0.2A
Operating Junction Temperature (Maximum)	TJ	150°C
Emitter-Base Voltage (Maximum)	VEB	4V
Forward Current Transfer Ratio (hFE Value)		50
Transition Frequency	FT	200MHz
Collector Capacitance	CC	4.5pF

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