BC557CZL1

Single Bipolar Transistors Overview

The BC557CZL1 is a PNP silicon general-purpose amplifier transistor manufactured by onsemi. It operates with a maximum collector-emitter voltage of -45 Vdc and a continuous collector current of -100 mAdc. The device features a minimum DC current gain (hFE) of 180 at IC = -10 mAdc for the C series. It is housed in a TO-92 plastic package (Case 29) and supports an operating junction temperature range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• PNP silicon epitaxial planar construction designed for low-current amplification applications
• High DC current gain characteristics suitable for signal processing tasks
• Robust thermal performance with high junction-to-case thermal resistance rating

Single Bipolar Transistors Applications

• General purpose switching circuits
• Low-level amplification stages
• Audio pre-amplifier designs

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix ZL1 corresponds to the Ammo Box shipping configuration as documented in the manufacturer's ordering information table. Confirm that the component meets Pb-Free requirements if environmental compliance is mandatory, noting that the base part number may require a G suffix for lead-free certification according to the datasheet specifications.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with a -45 V collector-emitter breakdown voltage is required. Ensure the application current remains within the -100 mAdc continuous limit. Consider the TO-92 package constraints for thermal dissipation, specifically the 625 mW limit at 25°C ambient temperature, and verify that the hFE range aligns with circuit biasing requirements.

Single Bipolar Transistors Part Context

This device belongs to the BC55x family of PNP transistors, which includes complementary NPN types such as the BC546, BC547, and BC548. The BC557 variant specifically targets general-purpose amplifier roles, offering higher current gain than the BC556 while sharing similar voltage ratings with the BC558 family members.

Single Bipolar Transistors Replacement Considerations

Direct functional substitutes include the BC557C and BC557CG from various manufacturers. Verify pinout compatibility and electrical parameter equivalence before substitution.