BC558C

Single Bipolar Transistors Overview

The BC558C is a general-purpose PNP silicon epitaxial planar transistor manufactured by onsemi. It features a TO-92 through-hole package with a maximum DC collector current of 100 mA and a collector-emitter voltage (VCEO) of 30 V. The device has a power dissipation rating of 500 mW and a transition frequency (fT) of 150 MHz. It operates within a temperature range of -55°C to +150°C junction temperature. The component is RoHS compliant and lead-free.

Single Bipolar Transistors Feature Summary

• General-purpose PNP bipolar junction transistor designed for amplifier and switching applications
• Plastic case material with UL classification 94V-0 for flame retardancy
• Single configuration in a standard TO-92 through-hole package

Single Bipolar Transistors Applications

• General purpose amplification circuits
• Switching applications requiring low to medium current handling
• Complementary pairing with NPN transistors in push-pull configurations

Single Bipolar Transistors Procurement Notes

Verify the manufacturer marking on the component body to confirm onsemi origin, as multiple vendors produce this part number. Check the datasheet revision date to ensure alignment with specific electrical tolerances. Confirm RoHS compliance status if required for your assembly process. Ensure the TO-92 package dimensions match your PCB footprint requirements before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select the BC558C when a general-purpose PNP transistor with 30 V breakdown and 100 mA current capability is needed. Consider the TO-92 package for through-hole designs. Compare hFE gain ranges against circuit requirements. Evaluate thermal management needs given the 500 mW power dissipation limit. Verify compatibility with complementary NPN devices like the BC548C for matched pairs.

Single Bipolar Transistors Part Context

The BC558C belongs to the widely used BC556-BC560 series of small-signal transistors. This family provides complementary NPN/PNP pairs for versatile analog design. The 'C' suffix typically denotes a specific DC current gain (hFE) binning range, offering tighter performance consistency compared to lower suffix variants. It serves as a standard replacement for legacy silicon PNP transistors in consumer and industrial electronics.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitutes include BC559C from Diotec Semiconductor. Other manufacturers such as Fairchild, Vishay, and NXP also produce equivalent BC558C parts. Verify pinout compatibility and electrical parameter overlaps before substitution.