BC550ABU

Single Bipolar Transistors Overview

The BC550ABU is a single NPN epitaxial silicon transistor manufactured by Fairchild Semiconductor, now part of onsemi. It is housed in a TO-92-3 through-hole package designed for general-purpose switching and amplifier applications. The device features a maximum collector-emitter voltage of 45 V and a continuous collector current rating of 100 mA. Key electrical characteristics include a DC current gain (hFE) minimum of 110 at 2 mA and 5 V, a transition frequency of 300 MHz, and a maximum power dissipation of 500 mW. The component supports a junction temperature up to 150°C.

Single Bipolar Transistors Feature Summary

• Epitaxial silicon construction for reliable performance
• Designed for low-noise switching and amplification tasks
• Complements the PNP BC560 series within the same family

Single Bipolar Transistors Applications

• General-purpose signal amplification
• Electronic switching circuits
• Audio pre-amplifier stages

Single Bipolar Transistors Procurement Notes

Verify the manufacturer status carefully as Fairchild Semiconductor has been acquired by onsemi. Confirm that the specific ordering suffix matches current system requirements due to potential nomenclature changes during integration. Ensure the component meets RoHS compliance standards if required by your design specifications before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select this component when a standard NPN transistor with moderate voltage ratings and low noise characteristics is required. It serves as the complementary pair to the BC560A PNP transistor. Consider the TO-92 package constraints for thermal management and ensure the 100 mA current limit aligns with the circuit's operational demands.

Single Bipolar Transistors Part Context

This component belongs to the widely used BC546/BC550 series of small-signal bipolar transistors. These devices are industry-standard replacements for older 2N-series equivalents. The BC550 variant specifically denotes the NPN polarity within this lineup, offering a balance of gain and speed suitable for consumer electronics and industrial control modules.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute: 2N5232A PBFREE by Central Semiconductor Corp.