BD140 PNP Transistor

Type: PNP (Positive-Negative-Positive) transistor: In PNP transistors like the BD140, current flows from the collector (C) to the emitter (E) when a small current is applied to the base (B).

Polarity: The BD140 is a PNP transistor, which means it amplifies or switches electronic signals with a positive voltage at the collector relative to the emitter.

Amplification: The BD140 has a moderate gain, typically ranging from 40 to 250. This makes it suitable for amplification purposes in small-signal applications.

Voltage Ratings: The transistor is often rated for a maximum collector-emitter voltage (VCEO) of around 80 to 100 volts and a collector current (IC) of up to 1.5 A.

Package Type: The BD140 is typically available in a TO-126 package or a TO-220 package, which are commonly used packages for easy mounting on a PCB.