BC556ABU

Single Bipolar Transistors Overview

The BC556ABU is a PNP silicon epitaxial planar transistor manufactured by Fairchild Semiconductor, designed for switching and audio frequency amplifier applications. It belongs to the BC556 series, which is categorized by current gain groups A, B, and C. The device features a collector-emitter breakdown voltage of 45 V and a maximum continuous collector current of 100 mA. It operates within a junction temperature range of -55°C to +150°C and utilizes a TO-92 plastic package with three leads.

Single Bipolar Transistors Feature Summary

• Designed for general-purpose switching and audio frequency amplifier applications
• Utilizes silicon epitaxial planar technology for reliable performance
• Categorized into specific current gain groups (A, B, C) for precise selection

Single Bipolar Transistors Applications

• General-purpose signal switching circuits
• Audio frequency amplification stages
• Complementary pairing with NPN transistors such as the BC546

Single Bipolar Transistors Procurement Notes

Verify the manufacturer origin, as the BC556ABU part number is utilized by multiple semiconductor vendors including Fairchild, Vishay, and Diotec. Confirm that the specific datasheet aligns with the required electrical characteristics, particularly the hFE grouping and absolute maximum ratings, before finalizing procurement decisions.

Single Bipolar Transistors Selection Notes

Select the BC556ABU when a PNP transistor with a 45 V collector-emitter voltage rating and 100 mA current capacity is required. The 'A' suffix indicates a specific DC current gain bin, ensuring tighter tolerance compared to standard variants. Ensure the application environment supports the specified operating temperature range and thermal dissipation limits.

Single Bipolar Transistors Part Context

The BC556ABU is part of the broader BC556/BC557/BC558 family of small-signal PNP transistors. These components are widely used in consumer electronics and industrial control systems due to their robustness and standardized pinout. The BC556 specifically offers a 45 V rating, distinguishing it from the lower-voltage BC558 and higher-voltage BC557 variants within the same package type.