BC557BZL1

Single Bipolar Transistors Overview

The BC557BZL1 is a PNP silicon epitaxial planar transistor manufactured by onsemi in a TO-92 (Case 29) plastic package. It features a collector-emitter voltage of -45 Vdc and a continuous collector current of -100 mAdc. The device provides a minimum DC current gain (hFE) of 120 at IC = -10 mAdc, with a typical current-gain bandwidth product of 320 MHz. Thermal resistance from junction to ambient is 200 °C/W, and the operating junction temperature range spans from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• PNP general-purpose amplifier transistor designed for low-current applications
• Lead-free packaging available compliant with environmental standards
• Suitable for switching and amplification circuits

Single Bipolar Transistors Applications

• General purpose switching
• Amplifier circuits
• Low current signal processing

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix ZL1 corresponds to the Ammo Box shipping configuration as documented in the official onsemi Device Ordering Information table. Confirm that the part number includes the correct series designation B for the specified hFE binning. Ensure compatibility with TO-92 mounting requirements and thermal derating guidelines provided in the datasheet.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with a -45 V collector-emitter rating and -100 mA continuous current capability is required. The B-series gain binning ensures a minimum hFE of 120 at -10 mAdc. Consider the TO-92 package constraints for thermal dissipation and verify lead-free compliance if necessary for assembly processes.

Single Bipolar Transistors Part Context

This component belongs to the BC556/BC557/BC558 family of PNP silicon transistors. The BC557 variant specifically offers a -45 V breakdown voltage, distinguishing it from the higher-voltage BC556 (-65 V) and lower-voltage BC558 (-30 V). The ZL1 suffix indicates a specific bulk packaging format within the broader product line.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include BC557BRL1 (Tape & Reel), BC557BG (Bulk Lead-Free), and BC557B (Bulk). Verify pinout consistency and electrical parameter alignment before substitution.