LJ4004D8RP

Triacs Overview

The Littelfuse LJ4004D8RP is a bidirectional triac designed for AC power control applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an RMS on-state current (IT(RMS)) of 4 A. The device operates within a junction temperature range of -40°C to +150°C. Key electrical parameters include a maximum gate trigger current (IGT) of 1.2 A, an on-state voltage (VTM) of 1.4 V, and a leakage current of 5 µA at VDRM. It is housed in a surface-mount TO-252-3 package.

Triacs Feature Summary

• Bidirectional switching capability for AC phase control
• Glass-passivated junctions for parameter stability
• Surface-mount TO-252-3 packaging for automated assembly

Triacs Applications

• AC motor speed controls
• Temperature modulation systems
• Lighting dimmer circuits

Triacs Procurement Notes

Verify the specific suffix 'D8RP' against official Littelfuse documentation to confirm exact binning or testing criteria. Ensure compatibility with existing PCB footprints for the TO-252-3 package. Confirm RoHS compliance status through the manufacturer's current datasheet before finalizing procurement specifications.

Triacs Selection Notes

Select this component when a 400 V rating and 4 A continuous current are required in a compact surface-mount form factor. Consider the 1.2 A gate trigger current requirement for driver circuit design. Evaluate thermal management needs given the 150°C maximum operating temperature limit in enclosed environments.

Triacs Part Context

This part belongs to the LJxx04xx series of triacs from Littelfuse. These devices are engineered for general-purpose AC switching where moderate current handling and standard voltage ratings are sufficient. The series utilizes glass passivation to ensure long-term reliability under varying environmental conditions.

Triacs Replacement Considerations

Direct substitutes may include other 4A 400V triacs in TO-252 packages from Littelfuse or competitors, provided gate trigger characteristics match. Verify pinout compatibility and thermal resistance values before substitution.