Q4004D3TP

Triacs Overview

The Littelfuse Q4004D3TP is a standard triac rated for 4A RMS on-state current and 400V repetitive peak off-state voltage. Housed in a TO-252 (D-Pak) surface-mount package, it features a maximum gate trigger current of 10mA and a peak on-state voltage of 1.6V. The device supports a surge current rating of 55A and operates within a temperature range of -40°C to +125°C. It includes glass-passivated junctions for parameter stability and reliability.

Triacs Feature Summary

• Integrated diac trigger mechanism eliminates the need for external discrete components
• Electrically isolated mounting tab reduces assembly complexity
• Glass-passivated junctions ensure long-term parameter stability

Triacs Applications

• AC switching applications
• Phase control circuits
• Speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the specific suffix 'D3' against official Littelfuse documentation to confirm the exact pinout and electrical tolerances for the D-Pak variant. Ensure the selected component matches the required thermal management specifications for the intended PCB layout.

Triacs Selection Notes

Select this component for designs requiring integrated triggering without external diacs. Verify that the 4A RMS current rating meets the load requirements and that the TO-252 package fits the available board space. Confirm compatibility with the driving circuit's gate current capabilities.

Triacs Part Context

This part belongs to the Teccor QxxxxLTx series of Quadrac devices manufactured by Littelfuse. These devices combine a triac and a diac trigger in a single package to simplify AC control circuit design. The series offers various current and voltage ratings for different power levels.

Triacs Replacement Considerations

Direct substitutes include other Triac-Diac combinations from manufacturers like STMicroelectronics or ON Semiconductor. Verify equivalent current, voltage, and package dimensions before substitution.