BC557 Transistor

BC557 Transistor

The BC557 is a PNP (Positive-Negative-Positive) bipolar junction transistor (BJT) commonly used in electronic circuits for amplification or switching purposes. It belongs to the BC5xx series of transistors and is widely used in various electronic projects due to its low cost and versatile characteristics.

BC557 Specifications

• Type: PNP
• Maximum Collector-Emitter Voltage (VCEO): -45V
• Maximum Collector-Base Voltage (VCBO): -50V
• Maximum Emitter-Base Voltage (VEBO): -5V
• Collector Current (IC): -100mA
• Power Dissipation (PD): 625mW
• Transition Frequency (ft): 100MHz
• DC Current Gain (hFE): 110 – 800

BC557 Features

• Low current (IC) and low voltage (VCE) operation
• High current gain (hFE)
• Suitable for audio, switching, and amplification applications
• Complementary to BC547 transistor
• Available in TO-92 package

Typical Applications

• Amplifier circuits
• Audio amplification
• Signal processing circuits
• Switching circuits
• Voltage regulation circuits