MM4257 PNP Transistor

The MM4257 is a bipolar junction transistor (BJT) with an PNP-type configuration. That means the MM4257 transistor has a negatively charged layer between two positively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The MM4257 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 MM4257 transistor as follows.

MM4257 Transistor Specification

Transistor Code		MM4257
Transistor Type		BJT
Transistor Polarity		PNP
Transistor Material		Silicon(SI)
Package		TO18
Collector Power Dissipation (Maximum)	PC	0.36W
Collector-Base Voltage (Maximum)	VCB	6V
Collector-Emitter Voltage (Maximum)	VCE	6V
Collector Current (Maximum)	IC	0.05A
Operating Junction Temperature (Maximum)	TJ	125°C
Emitter-Base Voltage (Maximum)	VEB	4V
Forward Current Transfer Ratio (hFE Value)		30
Transition Frequency	FT	500MHz
Collector Capacitance	CC	3pF

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