BC237A

Single Bipolar Transistors Overview

The BC237A is a general-purpose NPN silicon small-signal transistor manufactured by onsemi. It features a maximum collector current of 100 mA and a collector-emitter breakdown voltage of 45 V. The device utilizes a TO-92 plastic package with three leads. It offers a minimum DC current gain (hFE) of 120, ensuring reliable amplification performance. The component supports an operating junction temperature range from -55 °C to +150 °C and provides a total device dissipation of 350 mW at 25 °C ambient temperature.

Single Bipolar Transistors Feature Summary

• NPN silicon construction for general-purpose signal processing
• High current gain capability for effective amplification
• Robust thermal stability across wide temperature ranges

Single Bipolar Transistors Applications

• General purpose amplifier circuits
• Switching applications in low power systems
• Audio pre-amplifier stages

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer marking and datasheet revision when sourcing the BC237A. Confirm that the component matches the ON Semiconductor specification sheet for electrical characteristics such as hFE grading and thermal resistance. Ensure the package type corresponds to the required PCB footprint and verify compliance with relevant environmental standards if applicable to the final assembly.

Single Bipolar Transistors Selection Notes

Select the BC237A for designs requiring moderate voltage handling and standard current amplification. Compare its 45 V rating against circuit supply voltages to ensure adequate margin. Consider the TO-92 package constraints for thermal management in high-density layouts. Evaluate alternative transistors only if higher current capacity or different packaging formats are strictly necessary for the application.

Single Bipolar Transistors Part Context

This component belongs to the BC237 series of NPN transistors, which includes variants like BC237B and BC237C differentiated primarily by their current gain levels. The series is widely used in consumer electronics and industrial control boards. The BC237A represents the standard gain variant within this family, offering a balance between cost and performance for common signal conditioning tasks.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include the BC237B and BC237C, provided the design accommodates their respective hFE ranges. Other generic NPN transistors with similar 45V/100mA ratings may serve as functional replacements if pinouts and thermal characteristics align.