BD434

Overview

The BD434 is a complementary silicon power transistor manufactured by STMicroelectronics. It serves as the PNP counterpart to the BD433, BD435, and BD437 NPN types. These devices utilize a silicon epitaxial-base construction housed in a Jedec SOT-32 plastic package. The component is designed for medium power linear and switching applications.

Feature Summary

• Complementary PNP configuration paired with specific NPN variants
• Silicon epitaxial-base technology for robust performance
• Jedec SOT-32 plastic package for standard mounting

Applications

• Medium power linear applications
• Switching applications
• Car-radio output stages (as part of complementary pairs)

Procurement Notes

Verify current production status as the BD434 may be classified as obsolete. Confirm package integrity and pinout compatibility with existing designs. Ensure sourcing from authorized distributors to guarantee authenticity. Check for available complementary NPN counterparts if designing complete output stages.

Selection Notes

Select the BD434 when a complementary PNP device is required to match BD433, BD435, or BD437 NPN transistors. Consider the SOT-32 package constraints for board space. Evaluate suitability for medium power linear and switching tasks. Verify thermal management requirements for the intended application environment.

Part Context

The BD434 belongs to a family of complementary silicon power transistors that includes BD433, BD435, BD436, BD437, and BD438. This series provides matched PNP-NPN pairs for push-pull configurations. The family is categorized under STMicroelectronics' preferred sale type for complementary devices.

Replacement Considerations

Direct substitutes include BD436 and BD438 for complementary pairing with other NPN variants in the series. Verify electrical characteristics and package dimensions before substitution.