BC557B,126

Single Bipolar Transistors Overview

The BC557B,126 is a PNP silicon general-purpose small-signal transistor manufactured by NXP Semiconductors. It is housed in a TO-92 plastic package (SOT54) with three pins. The device supports a maximum collector current of 100 mA and a collector-emitter voltage of 45 V. It features a minimum DC current gain (hFE) of 125. The component operates at temperatures up to 150 °C and complies with RoHS standards.

Single Bipolar Transistors Feature Summary

• PNP bipolar junction transistor configuration for signal processing
• General-purpose switching and amplification capabilities
• Plastic TO-92 encapsulation for through-hole mounting

Single Bipolar Transistors Applications

• General purpose switching circuits
• Small signal amplification stages
• Driver modules for low-power loads

Single Bipolar Transistors Procurement Notes

Verify the specific suffix '126' against the official NXP datasheet to confirm tape-and-reel packaging specifications. Ensure the ordering code matches the required hFE binning grade. Confirm RoHS compliance status and lead-free terminal finish details directly from the manufacturer's documentation before procurement.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring a standard PNP switch or amplifier with moderate current handling. Verify that the circuit base current requirements remain within safe limits to prevent exceeding the 100 mA collector current rating. Ensure the operating voltage does not exceed the 45 V collector-emitter breakdown threshold.

Single Bipolar Transistors Part Context

This part belongs to the BC557 series of PNP transistors designed for general electronic applications. It serves as the complementary counterpart to NPN devices such as the BC547. The series is widely utilized in consumer electronics and industrial control systems for basic signal conditioning tasks.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include the BC557A and BC557C variants, which share identical electrical characteristics but differ in current gain classification. Other generic PNP equivalents may be used if pinout and voltage ratings align.