BC33725

Single Bipolar Transistors Overview

The onsemi BC33725 is an NPN silicon epitaxial planar transistor designed for switching and audio frequency amplifier applications. It features a maximum DC collector current of 800 mA and a collector-emitter voltage rating of 45 V. The device offers a high DC current gain (hFE) range of 160 to 400, with a transition frequency of 100 MHz. Power dissipation is rated at 625 mW in a TO-92-3 package. Key electrical limits include a collector-base voltage of 50 V, emitter-base voltage of 5 V, and a collector-emitter saturation voltage of 700 mV at specified test conditions.

Single Bipolar Transistors Feature Summary

• High DC current gain subdivided into the -25 group for consistent amplification performance
• Low collector-emitter saturation voltage suitable for efficient switching operations
• Epitaxial silicon construction providing robustness for general-purpose signal processing

Single Bipolar Transistors Applications

• Audio frequency amplifier driver stages
• General-purpose low-power switching circuits
• Complementary pairing with PNP transistors in push-pull output configurations

Single Bipolar Transistors Procurement Notes

Verify the specific suffix (e.g., TA, BU, TF) against the required packaging format, as these denote variations in reel or bulk quantities rather than functional differences. Confirm RoHS compliance status and lead times directly with authorized distributors, noting that availability may vary by region. Ensure the selected variant matches the intended through-hole mounting requirements for the target PCB design.

Single Bipolar Transistors Selection Notes

Select the BC33725 when a moderate current capacity of 800 mA and a gain range of 160-400 are required for linear or switching tasks. Compare against the BC33716 for lower gain needs or the BC33740 for higher gain applications within the same thermal and voltage envelope. Ensure the operating junction temperature remains within the specified 150°C limit during continuous duty cycles.

Single Bipolar Transistors Part Context

This component belongs to the BC337 family of NPN general-purpose transistors manufactured by onsemi. The family is characterized by its versatility in both analog amplification and digital switching roles. The BC337 series is widely recognized for its complementary pairing with the BC327 PNP series, facilitating balanced design approaches in various electronic systems requiring matched performance characteristics.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include other manufacturers' BC33725 variants such as those from NXP or STMicroelectronics, provided they meet the identical 45V/800mA/160-400hFE specifications. Cross-reference part numbers like 2N3904 are unsuitable due to significantly lower current ratings. Verify pinout compatibility (Collector-Base-Emitter) before substitution.