2SD1257A NPN Transistor

The 2SD1257A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2SD1257A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2SD1257A 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 2SD1257A transistor as follows.

2SD1257A Transistor Specification

Transistor Code		2SD1257A
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO251
Collector Power Dissipation (Maximum)	PC	40W
Collector-Base Voltage (Maximum)	VCB	150V
Collector Current (Maximum)	IC	7A
Operating Junction Temperature (Maximum)	TJ	150°C
Forward Current Transfer Ratio (hFE Value)		80
Transition Frequency	FT	30MHz

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