LJ4008D8TP

Triacs Overview

The Littelfuse LJ4008D8TP is a bidirectional triac designed for AC switching and phase control applications. It features an RMS on-state current of 8 A and a rated repetitive off-state voltage of 800 V. The device operates within a temperature range of -40 °C to +150 °C and utilizes a TO-252-3 surface-mount package. Key electrical parameters include an on-state voltage of 1.5 V, a gate trigger voltage of 1.3 V, and a gate trigger current of 35 mA. The component exhibits a maximum off-state leakage current of 10 uA at the rated voltage.

Triacs Feature Summary

• Sensitive gate type ensuring reliable control in Quadrants I & IV for digital circuitry compatibility
• High thermal stability supporting operation up to +150 °C junction temperature
• Surface-mount construction in a compact TO-252-3 package for automated PCB assembly

Triacs Applications

• Motor speed modulation controls
• Temperature modulation systems
• Lighting control circuits
• Static switching relays

Triacs Procurement Notes

Verify the specific Littelfuse datasheet for the LJ4008D8TP to confirm RoHS compliance status and REACH SVHC declarations prior to integration. Ensure that the TO-252-3 package dimensions align with the target PCB footprint. Confirm that the 8 A RMS current rating meets the thermal management requirements of the final enclosure design under expected ambient conditions.

Triacs Selection Notes

Select this component when an 800 V blocking capability and 8 A continuous load current are required in a surface-mount form factor. The sensitive gate characteristic (1.3 V / 35 mA) makes it suitable for direct interface with low-power logic controllers. Consider the thermal resistance of the TO-252-3 package if operating near the upper limit of the 8 A rating.

Triacs Part Context

This part belongs to the Littelfuse LJxx08xx series of thyristors. These devices are engineered as four-quadrant logic level triacs, providing robust performance in AC power control environments. The series is characterized by its ability to handle high voltages while maintaining precise gate sensitivity for modern digital control interfaces.

Triacs Replacement Considerations

Consult official Littelfuse documentation for verified cross-reference data. No public substitute part numbers are confirmed in the available source material.