Q8008LH4

Triacs Overview

The Littelfuse Q8008LH4 is a bidirectional TRIAC designed for AC power control applications. It features an 8 A RMS on-state current and an 800 V repetitive off-state voltage rating. The device operates within a junction temperature range of -40 °C to +125 °C and utilizes a through-hole mounting style. Key electrical characteristics include a maximum holding current of 35 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 35 mA. The component exhibits a forward voltage drop of 1.6 V and a non-repetitive peak on-state current capability of 83 A or 100 A depending on the specific test condition.

Triacs Feature Summary

• Bidirectional switching capability for alternating current circuits
• High thermal stability with operation up to +125 °C
• Robust surge handling with high non-repetitive peak current ratings

Triacs Applications

• General AC motor speed control systems
• Solid-state relay output stages
• Lighting dimmer circuitry

Triacs Procurement Notes

Verify the specific datasheet revision when sourcing the Q8008LH4 to ensure compatibility with your design requirements. Confirm that the through-hole package dimensions match your PCB footprint constraints. Check for RoHS compliance status as indicated in the manufacturer's documentation before finalizing procurement plans.

Triacs Selection Notes

Select the Q8008LH4 when an 800 V blocking voltage and 8 A continuous current are required in a standard through-hole configuration. Ensure the gate drive circuit can supply at least 35 mA to guarantee reliable triggering. Consider the thermal management needs for maintaining junction temperatures below +125 °C under full load conditions.

Triacs Part Context

This component belongs to the Qxx08xhx series of TRIACs from Littelfuse. The series provides standardized solutions for medium-power AC switching tasks. The LH4 suffix typically denotes the specific package type and terminal configuration used for this particular variant within the broader product family.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic TRIAC replacements must match the 800 V rating, 8 A current capacity, and TO-220AB package form factor to ensure mechanical and electrical compatibility.