MD4957 PNP Transistor

The MD4957 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the MD4957 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The MD4957 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 MD4957 transistor as follows.

MD4957 Transistor Specification

Transistor Code		MD4957
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Silicon(SI)
Package		TO77
Collector Power Dissipation (Maximum)	PC	0.4W
Collector-Base Voltage (Maximum)	VCB	30V
Collector-Emitter Voltage (Maximum)	VCE	30V
Collector Current (Maximum)	IC	0.05A
Operating Junction Temperature (Maximum)	TJ	200°C
Emitter-Base Voltage (Maximum)	VEB	3V
Forward Current Transfer Ratio (hFE Value)		20
Transition Frequency	FT	750MHz
Collector Capacitance	CC	0.4pF

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