QK004D4RP

Triacs Overview

The Littelfuse QK004D4RP is a bidirectional triac from the Teccor family, housed in a TO-252-3 (DPAK) surface-mount package. It supports an RMS on-state current of 4 A and offers rated repetitive peak off-state voltages of 800 V or 1000 V depending on the specific suffix variant within the QK series. The device features a gate trigger voltage of 2.5 V and a gate trigger current of 25 mA to 50 mA. It operates within a junction temperature range of -40°C to +125°C, with a maximum holding current of 30 mA and an on-state voltage drop of 1.6 V.

Triacs Feature Summary

• Four-quadrant logic level sensitivity for reliable triggering across all gate polarities.
• High thermal stability designed for robust performance in demanding power control environments.
• Surface-mount construction facilitates automated assembly and compact PCB layout.

Triacs Applications

• Solid-state relay modules
• AC motor speed control circuits
• Lighting dimmer applications

Triacs Procurement Notes

Verify the exact voltage rating by checking the full part number suffix, as the QK series includes both 800 V and 1000 V variants. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering quantity aligns with standard reel packaging requirements specified by Littelfuse.

Triacs Selection Notes

Select this component when a 4 A RMS current capacity is required in a low-profile SMD footprint. Compare the QK004D4RP against the QJ4004D4RP if higher temperature operation up to 150°C or lower on-state voltage is necessary. Verify that the 2.5 V gate trigger requirement matches the available drive voltage in the target circuit design.

Triacs Part Context

This triac belongs to the broader Qxx04xx product family manufactured under the Teccor brand. It shares mechanical dimensions and basic electrical characteristics with other 4 A devices in the series, differentiated primarily by their blocking voltage ratings and specific manufacturing revisions.

Triacs Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult Littelfuse technical support for qualified alternatives matching specific voltage and thermal constraints.