BC857B PNP SMD Transistor SOT-23 (General Purpose Switching & Amplifier Transistor)

The BC857B PNP SMD Transistor is a general-purpose bipolar junction transistor (BJT) designed for switching and low-power amplification applications. Housed in a compact SOT-23 surface-mount package, it is suitable for high-density PCB designs and automated assembly processes. The BC857B is widely used in embedded systems, signal conditioning, consumer electronics, industrial control equipment, power management circuits, and general-purpose switching applications where reliable performance and low power consumption are required.

Key Features -

• PNP bipolar junction transistor

• Compact SOT-23 surface-mount package

• General-purpose switching applications

• Low-power signal amplification

• High current gain classification (B Gain Group)

• Low power consumption

• High reliability and stable performance

• Suitable for automated PCB assembly

• Compact footprint for space-saving designs

• Ideal for embedded and consumer electronics

Specifications -

• Product type - Bipolar Junction Transistor (BJT)

• Model - BC857B

• Transistor type - PNP

• Package type - SOT-23

• Mounting type - Surface Mount (SMD)

• Collector-Emitter Voltage (VCEO) - 45V

• Collector Current (IC) - 100mA Maximum

• Power Dissipation (PD) - 250mW Maximum

• DC Current Gain (hFE) - 200 to 450 (Gain Group B)

• Transition Frequency (fT) - 100MHz Typical

• Operating Temperature - Minus 55C to 150C

Applications -

• Signal switching circuits

• Low-power amplifiers

• Audio circuits

• Embedded systems

• Consumer electronics

• Industrial control systems

• Power management circuits

• General-purpose electronic designs