BC107

Single Bipolar Transistors Overview

The BC107 is a silicon Planar Epitaxial NPN transistor housed in a TO-18 metal case. It is designed for low noise general purpose audio amplifiers, driver stages, and signal processing circuits in television receivers. Key electrical characteristics include a collector-base voltage of 50 V, a collector-emitter voltage of 45 V, and a continuous collector current of 100 mA. The device features a maximum total power dissipation of 0.3 W at ambient temperatures up to 25°C and 0.75 W at case temperatures up to 25°C. DC current gain ranges from 110 to 450 depending on the specific grade.

Single Bipolar Transistors Feature Summary

• Low noise performance suitable for sensitive input stages
• Robust thermal handling with high junction temperature capability
• Metal package construction providing mechanical stability

Single Bipolar Transistors Applications

• Driver stages in electronic circuits
• Low noise input stages for audio equipment
• Signal processing circuits in television receivers

Single Bipolar Transistors Procurement Notes

Verify the specific suffix (e.g., BC107 vs BC107B) against the required DC current gain range before ordering. Confirm that the TO-18 metal package meets the mechanical constraints of the target PCB layout. Ensure the supplier provides documentation confirming compliance with the absolute maximum ratings specified in the STMicroelectronics datasheet.

Single Bipolar Transistors Selection Notes

Select this component when low noise figures are critical for the application, such as in pre-amplifier stages. Compare the hFE requirements against the available grades; the standard BC107 offers a minimum gain of 110, while the BC107B variant starts at 200. Consider the TO-18 package size if through-hole mounting and metal shielding are preferred over surface-mount alternatives.

Single Bipolar Transistors Part Context

This component belongs to the BC107 series of NPN general-purpose transistors manufactured by STMicroelectronics. It serves as the NPN counterpart to the BC177 PNP transistor. The series is widely recognized for its reliability in analog signal processing applications requiring stable operation across a wide temperature range.

Single Bipolar Transistors Replacement Considerations

BC107B

Single Bipolar Transistors FAQ

What is the maximum operating junction temperature?

The maximum operating junction temperature is 175°C.

How does the BC107 differ from the BC107B?

The primary difference is the DC current gain (hFE). The BC107 has a minimum gain of 110, whereas the BC107B has a higher minimum gain of 200.

What is the typical noise figure for this transistor?

The typical noise figure is 2.1 dB, measured at a collector current of 0.2 mA, VCE of 5 V, and a frequency of 1 kHz.