BC556A

Single Bipolar Transistors Overview

The Diotec Semiconductor BC556A is a general-purpose PNP bipolar junction transistor (BJT) designed for commercial and industrial applications. It operates with a maximum collector current of 100 mA and features three distinct DC current gain groups, with Group A providing a minimum hFE of 110 at -2 mA. The device supports a collector-emitter voltage of 65 V and dissipates up to 500 mW of power. It utilizes a TO-92 through-hole package and functions within a junction temperature range of -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• General-purpose PNP transistor suitable for signal processing, switching, and amplification tasks
• Available in three specific DC current gain groups (A, B, C) for precise circuit matching
• Compliant with RoHS directives without exemptions and adheres to REACH regulations

Single Bipolar Transistors Applications

• Signal processing circuits
• Electronic switching applications
• Amplification stages

Single Bipolar Transistors Procurement Notes

Verify the exact ordering suffix when purchasing, as standard bulk packaging requires the 'BK' suffix while taped ammo-pack versions are standard. Confirm compliance requirements such as AEC-Q101 if automotive-grade reliability is necessary, as these require specific suffix designations. Ensure the selected variant matches the required current gain group for your application.

Single Bipolar Transistors Selection Notes

Select the BC556A when a PNP transistor with a 65 V collector-emitter breakdown voltage is required. Choose this component over other variants based on the specific DC current gain group needed; Group A offers a minimum hFE of 110. Consider the TO-92 package constraints and the 500 mW power dissipation limit relative to ambient temperature derating curves.

Single Bipolar Transistors Part Context

The BC556A belongs to the BC556...BC559 family of universal PNP transistors manufactured by Diotec Semiconductor. This series is subdivided into multiple voltage ratings and current gain groups to cover various general-purpose needs. The BC556 specifically provides the highest voltage rating within the lower-current subset of this family.

Single Bipolar Transistors Replacement Considerations

The datasheet recommends the BC546...BC549 series as complementary NPN transistors. For direct replacements within the same manufacturer's lineup, verify equivalent voltage ratings and current gain specifications against the BC557, BC558, or BC559 models.