BC559BU

Single Bipolar Transistors Overview

The BC559BU is a PNP epitaxial planar silicon transistor manufactured by onsemi, designed for general-purpose amplification and switching applications. It features a maximum collector-emitter voltage of 30 V and a continuous collector current of 100 mA. The device operates within a junction temperature range up to 150°C and dissipates up to 500 mW of power. Key electrical characteristics include a transition frequency of 150 MHz and a minimum DC current gain (hFE) of 110 at 2 mA and 5 V. It is housed in a TO-92-3 through-hole package.

Single Bipolar Transistors Feature Summary

• PNP polarity configuration suitable for complementary NPN circuits
• High-speed operation with a 150 MHz transition frequency
• Robust thermal performance supporting up to 150°C junction temperature

Single Bipolar Transistors Applications

• General-purpose signal amplification
• Electronic switching circuits
• Complementary pairs with NPN transistors

Single Bipolar Transistors Procurement Notes

Verify the specific suffix BU against official datasheets to confirm pinout and gain binning. Confirm end-of-life status as distributor listings indicate discontinuation. Request current PCN documentation from onsemi to assess any material or packaging changes affecting long-term availability.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with 30 V breakdown and 100 mA current capacity is required. Ensure the application does not exceed the 500 mW power dissipation limit. Consider the 150 MHz bandwidth for high-frequency signal processing tasks where low noise and fast switching are necessary.

Single Bipolar Transistors Part Context

This part belongs to the BC556-BC560 family of small-signal transistors. It serves as the PNP counterpart to the BC549 NPN transistor. The series is widely used in consumer electronics and industrial control systems requiring reliable, low-power switching and amplification capabilities in standard through-hole packages.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute part numbers: BC559CTA.