QJ4004D3TP

Triacs Overview

The Littelfuse QJ4004D3TP is a bidirectional triac in the QJxx04xx series, rated for 4A RMS on-state current and 400V repetitive peak off-state voltage. It utilizes a TO-252 D-PAK surface-mount package designed for AC switching and phase control applications. The device features glass-passivated junctions to ensure long-term reliability and parameter stability under varying thermal conditions.

Triacs Feature Summary

• Integrated gate control for bidirectional AC switching and phase modulation
• Glass-passivated junctions for enhanced device reliability
• Surface-mount D-PAK packaging optimized for board space efficiency

Triacs Applications

• Speed controls
• Temperature modulation controls
• Lighting controls requiring noise immunity

Triacs Procurement Notes

Verify the specific suffix 'D3TP' against the manufacturer's official datasheet to confirm the exact tape-and-reel quantity and moisture sensitivity level. Confirm RoHS compliance status directly with Littelfuse documentation prior to final procurement decisions.

Triacs Selection Notes

Select this component when a 4A RMS current rating and 400V blocking capability are required in a compact surface-mount form factor. Ensure the application circuit provides adequate heat sinking for the TO-252 package to maintain junction temperatures within the specified operating range during continuous conduction.

Triacs Part Context

This part belongs to the QJxx04xx series of standard triacs manufactured by Littelfuse. The series is characterized by its robust construction for general-purpose AC power control, offering a balance of current handling and voltage blocking in standardized packages suitable for mass production.

Triacs Replacement Considerations

Consult Littelfuse technical support for verified cross-reference part numbers. Substitutions must match the 4A/400V ratings and TO-252 package dimensions to ensure mechanical and electrical compatibility.