BC547BU

Single Bipolar Transistors Overview

The onsemi BC547BU is a general-purpose NPN silicon epitaxial planar transistor housed in a TO-92 (TO-226AA) three-pin through-hole package. It features a maximum collector current of 100 mA and a collector-emitter voltage rating of 45 V. The device offers a minimum DC current gain (hFE) of 110, with a transition frequency of up to 1 MHz. Absolute maximum ratings include a collector-base voltage of 50 V, an emitter-base voltage of 6 V, and a total power dissipation of 500 mW at 25°C. The operating junction temperature range extends from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• General-purpose small-signal amplification and switching capabilities
• Lead-free construction compliant with RoHS standards
• High thermal stability with a maximum junction temperature of 150°C

Single Bipolar Transistors Applications

• General-purpose amplifier circuits
• Low-frequency switching applications
• Audio signal processing stages

Single Bipolar Transistors Procurement Notes

Verify the specific suffix against official datasheets to confirm hFE binning and packaging type. Ensure the procurement channel provides valid traceability documentation for quality assurance. Confirm that the delivered components match the specified TO-92 form factor and lead configuration required by the design.

Single Bipolar Transistors Selection Notes

Select this component when a standard NPN transistor with moderate gain and low noise is required for discrete circuit designs. Consider the 45V breakdown voltage and 100mA current limit to ensure adequate headroom for the intended load. Verify that the thermal management strategy supports the 500mW dissipation rating under worst-case operating conditions.

Single Bipolar Transistors Part Context

This part belongs to the BC546–BC550 series of NPN silicon transistors manufactured by onsemi. These devices are widely used as fundamental building blocks in electronic systems due to their reliability and cost-effectiveness. The series includes complementary PNP counterparts and variants with different gain ranges to suit diverse application requirements.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include BC547BTA and BC547BTF from onsemi, which share identical electrical characteristics and pinout configurations. Other manufacturers offer equivalent parts such as the 2N3904 or S8050, though parameter variations may require circuit re-evaluation.