BD679

Overview

The BD679 is an active NPN power Darlington transistor manufactured by STMicroelectronics. It utilizes planar base island technology with a monolithic Darlington configuration. The device features good hFE linearity and high fT frequency performance. It includes an integrated antiparallel collector-emitter diode within the structure. The component is supplied in SOT-32 packages and is classified as Industrial grade. It complies with Ecopack1 standards.

Feature Summary

• Monolithic Darlington configuration with integrated antiparallel collector-emitter diode
• Good hFE linearity
• High fT frequency

Applications

Procurement Notes

Verify the specific ordering suffix to confirm package type, such as SOT-32, and ensure compliance requirements like Ecopack1 are met for your design. Confirm the industrial grade classification aligns with operational temperature ranges. Check current availability status as components may transition between active and obsolete states. Validate that the NPN polarity matches circuit requirements before procurement.

Selection Notes

Select this component when high current gain and linear amplification are required in power applications. The integrated antiparallel diode simplifies circuits involving inductive loads or flyback protection. Ensure the thermal management solution accommodates the power dissipation characteristics of the SOT-32 package. Verify that the switching speed meets the system's frequency demands.

Part Context

This part belongs to STMicroelectronics' portfolio of Darlington transistors, which offers voltage ratings up to 400 V. The series includes both NPN and PNP polarities. These devices are designed for robust performance in industrial applications requiring reliable power switching and amplification capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.