BC557ABU

Single Bipolar Transistors Overview

The BC557ABU is a single PNP bipolar junction transistor manufactured by onsemi, housed in a TO-92-3 through-hole package. It features a maximum collector-emitter voltage of 45 V and a continuous collector current rating of 100 mA. The device has a maximum power dissipation of 500 mW and a transition frequency of 150 MHz. DC current gain (hFE) is specified with a minimum value of 110 at 2 mA and 5 V. Collector-emitter saturation voltage is limited to 650 mV at 5 mA base current and 100 mA collector current. The component supports a maximum junction temperature of 150°C.

Single Bipolar Transistors Feature Summary

• PNP epitaxial planar silicon construction for reliable signal amplification
• High DC current gain performance suitable for general-purpose switching applications
• Through-hole mounting capability in standard TO-92-3 leaded package

Single Bipolar Transistors Applications

• General-purpose amplifier circuits
• Electronic switching applications
• Driver stages for relay or LED loads

Single Bipolar Transistors Procurement Notes

Verify the specific suffix ABU against the manufacturer datasheet to confirm the hFE binning range, as it differs from standard variants. Confirm RoHS compliance status via official documentation. Check part status as some listings indicate end-of-life conditions. Ensure the TO-92-3 pinout matches the design schematic before integration.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with moderate gain and 45 V breakdown is required. Compare hFE specifications against other BC557 series variants like BC557BTA if higher gain is needed. Verify thermal management requirements for the TO-92 package under expected load conditions. Ensure compatibility with existing PCB footprints designed for standard three-lead axial leads.

Single Bipolar Transistors Part Context

This component belongs to the BC557 series of PNP transistors produced by onsemi. It shares core electrical characteristics with other members of the family but is distinguished by its specific gain classification indicated by the 'A' suffix. The device is commonly used in consumer electronics and industrial control systems requiring small-signal processing.

Single Bipolar Transistors Replacement Considerations

BC557BTA and BC557BTF are listed as parameter-equivalent replacements by distributors.