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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.

Circuit diagram symbol of the 2SD1257A transistor

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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