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A157B NPN Transistor

The A157B is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the A157B transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The A157B 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 A157B transistor as follows.

Circuit diagram symbol of the A157B transistor

A157B Transistor Specification

Transistor Code A157B
Transistor Type BJT
Transistor Polarity NPN
Transistor Material Silicon(SI)
Package TO18
Collector Power Dissipation (Maximum) PC 0.3W
Collector-Base Voltage (Maximum) VCB 50V
Collector-Emitter Voltage (Maximum) VCE 45V
Collector Current (Maximum) IC 0.1A
Operating Junction Temperature (Maximum) TJ 175°C
Emitter-Base Voltage (Maximum) VEB 5V
Forward Current Transfer Ratio (hFE Value) 240
Transition Frequency FT 150MHz
Collector Capacitance CC 5pF

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