BC547B

Single Bipolar Transistors Overview

The Diotec Semiconductor BC547B is a general-purpose NPN silicon epitaxial planar transistor housed in a TO-92 package. It features a collector-emitter voltage (VCEO) of 45 V and a continuous collector current (IC) of 100 mA, with a maximum power dissipation (Ptot) of 500 mW. The device offers three DC current gain (hFE) groups: Group A (110–220), Group B (200–450), and Group C (420–800). Key electrical characteristics include a transition frequency (fT) of 300 MHz, a collector-base cutoff current (ICES) of up to 15 nA at 25°C, and a saturation voltage (VCEsat) of 250 mV at IC=10mA/IB=0.5mA.

Single Bipolar Transistors Feature Summary

• General-purpose NPN transistor suitable for commercial and industrial applications
• Three distinct DC current gain groups (A, B, C) for precise amplification control
• RoHS compliant and REACH compliant construction without exemptions

Single Bipolar Transistors Applications

• Signal processing circuits
• Electronic switching applications
• Amplification stages

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix when purchasing. Standard versions are commercial grade. Suffixes such as -Q indicate AEC-Q101 compliance, while -AQ denotes qualification status. Confirm packaging details, as standard supply is typically in ammo packs, though bulk options may be available upon request. Ensure the selected variant matches the required reliability level for the target application environment.

Single Bipolar Transistors Selection Notes

Select the BC547B based on the required current gain group (A, B, or C) to meet specific amplification linearity needs. The 45 V collector-emitter voltage rating distinguishes it from the lower-voltage BC548 series and higher-voltage BC546 series. Consider the thermal resistance and power dissipation limits when designing for high ambient temperatures. Verify that the TO-92 through-hole package aligns with the PCB layout requirements.

Single Bipolar Transistors Part Context

The BC547B belongs to the BC546...BC549 family of universal NPN transistors manufactured by Diotec Semiconductor. This series provides complementary PNP devices (BC556...BC559). The BC547B specifically occupies the middle ground in terms of breakdown voltage within this lineup, offering 45 V compared to 65 V for the BC546 and 30 V for the BC548.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include the BC547B from other manufacturers such as Fairchild, ON Semiconductor, and Taiwan Semiconductor. Cross-referencing datasheets is essential to verify pinout compatibility and ensure electrical parameters like hFE groups and VCEO ratings match the original design specifications.