BC556BU

Single Bipolar Transistors Overview

The BC556BU is a PNP silicon epitaxial planar transistor manufactured by onsemi, designed for general-purpose switching and audio frequency amplifier applications. It utilizes a TO-92 (SOT54) plastic package with kinked leads for through-hole mounting. The device supports a maximum collector current of 100 mA and a collector-emitter voltage of 65 V. Key electrical characteristics include a collector-base voltage of 80 V, an emitter-base voltage of 5 V, and a power dissipation rating of 500 mW at 25°C ambient temperature. The transition frequency is specified at 150 MHz, with a maximum operating junction temperature of +150°C.

Single Bipolar Transistors Feature Summary

• Epitaxial silicon construction optimized for low noise performance in amplifier circuits
• High voltage capability suitable for general-purpose switching tasks
• Through-hole compatible TO-92 package design for standard PCB integration

Single Bipolar Transistors Applications

• General purpose signal switching
• Audio frequency amplification stages
• Complementary pairing with BC546 series NPN transistors

Single Bipolar Transistors Procurement Notes

Verify the specific suffix 'BU' against the manufacturer's official datasheet to confirm the exact binning grade and packaging configuration. Ensure the component meets RoHS compliance requirements if mandated by the target application standards. Cross-reference the ordering code with authorized distributors to confirm current availability and lead times prior to finalizing procurement plans.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with 65V breakdown and 100mA continuous current capacity is required. The BC556B variant offers higher current gain than the base BC556 model. Consider the thermal limits of the TO-92 package for high-power dissipation scenarios. Verify that the hFE binning aligns with the circuit's gain requirements compared to other variants in the BC556 family.

Single Bipolar Transistors Part Context

This part belongs to the BC556 series of PNP general-purpose transistors produced by onsemi. The series is widely recognized for its reliability in consumer electronics and industrial control systems. The BC556BU specifically denotes the bulk packaging format within the broader product line, sharing core electrical specifications with tape-and-reel variants like the BC556BTF.

Single Bipolar Transistors Replacement Considerations

BC556BTA serves as a direct functional substitute from onsemi, offering identical electrical ratings in an Ammo Pack format.