BD436STU

Overview

The BD436STU is a PNP silicon epitaxial-base power transistor manufactured by onsemi. It belongs to the complementary BD43x series, designed for medium-power linear and switching applications. The device features a maximum collector-emitter voltage of 32V and a continuous collector current of 4A. It operates within a junction temperature range of -55°C to 150°C and has a maximum power dissipation of 36W. The component utilizes a surface-mount TO-263AB (D2PAK) package.

Feature Summary

• Complementary PNP counterpart to the BD437 NPN transistor
• Suitable for medium-power linear and switching applications
• High thermal stability with wide operating temperature range

Applications

• Medium power linear circuits
• Switching applications
• Audio output stages

Procurement Notes

Verify the specific suffix STU against official datasheets to confirm the TO-263AB surface-mount package variant. Confirm RoHS compliance status as older revisions may differ. Check for obsolescence notices from onsemi prior to finalizing design-in decisions.

Selection Notes

Select this component when a PNP power transistor matching the BD437 NPN pair is required. Ensure the application demands a 32V breakdown voltage and 4A current capability. Verify that the PCB layout supports the TO-263AB footprint and thermal requirements for 36W dissipation.

Part Context

The BD436STU is part of the BD43x family, which includes complementary NPN types like the BD437. This family is engineered for robust performance in audio and power management contexts. The STU suffix specifically denotes the surface-mount D2PAK configuration, differing from through-hole variants like the BD436T.

Replacement Considerations

The BD438 from STMicroelectronics is documented as a similar replacement option.