BC557B,112

Single Bipolar Transistors Overview

The BC557B,112 is a PNP silicon small-signal transistor manufactured by NXP Semiconductors. It is housed in a TO-92 (SOT54) plastic package 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 general-purpose switching and amplification capability
• Low current handling suitable for signal processing
• Plastic TO-92 encapsulation for through-hole mounting

Single Bipolar Transistors Applications

• General purpose switching circuits
• Small signal amplification stages
• Driver modules requiring low power control

Single Bipolar Transistors Procurement Notes

Verify the specific suffix '112' against the official NXP datasheet to confirm it denotes the standard tape-and-reel packaging format. Ensure the ordering part number matches the required hFE binning grade if strict gain thresholds are necessary for the design. Confirm compliance with current environmental directives before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring a PNP transistor with moderate voltage ratings and low current capacity. It serves as the complementary pair to NPN transistors such as the BC547. Consider the thermal characteristics and package constraints when designing for high-density PCB layouts or environments with limited cooling options.

Single Bipolar Transistors Part Context

This part belongs to the BC557 family of PNP general-purpose transistors produced by NXP Semiconductors. The family is widely used in consumer electronics and industrial equipment for basic signal processing tasks. The BC557B variant specifically indicates a defined current gain range within the broader product line.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include the BC557A and BC557C from various manufacturers, which share identical pinouts and electrical limits but differ in gain classification. Other generic PNP transistors with matching voltage and current ratings may be used if gain requirements are flexible.