SM1258 NPN Transistor

The SM1258 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the SM1258 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The SM1258 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 SM1258 transistor as follows.

SM1258 Transistor Specification

Transistor Code		SM1258
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Silicon(SI)
Package		TO3
Collector Power Dissipation (Maximum)	PC	250W
Collector-Emitter Voltage (Maximum)	VCE	400V
Collector Current (Maximum)	IC	50A
Operating Junction Temperature (Maximum)	TJ	200°C
Forward Current Transfer Ratio (hFE Value)		20
Transition Frequency	FT	20MHz

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