QJ4008VH3TP

Triacs Overview

The Littelfuse QJ4008VH3TP is an Alternistor TRIAC designed for high-reliability power control applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 8 A. The device exhibits a maximum on-state voltage of 1.5 V, with gate trigger specifications of 1.3 V and 10 mA. Leakage current is limited to 10 uA at VDRM. Operating temperatures range from -40 C to +150 C. It utilizes a TO-251-3 through-hole package.

Triacs Feature Summary

• High reliability construction suitable for demanding environments
• Bidirectional switching capability via Alternistor technology
• Robust thermal performance supporting operation up to 150 C

Triacs Applications

• Industrial motor speed control systems
• Solid state relay implementations
• Lighting dimmer circuits

Triacs Procurement Notes

Verify the specific suffix 'TP' against the manufacturer's official datasheet to confirm tape-and-reel packaging requirements. Ensure the 400V rating aligns with circuit voltage peaks. Confirm RoHS compliance status directly from the component documentation before finalizing procurement orders.

Triacs Selection Notes

Select this component when a bidirectional switch with 8A continuous current handling is required in a compact TO-251 form factor. Verify that the 400V blocking voltage exceeds the peak line voltage plus margin. Check gate drive capabilities against the 10 mA trigger current specification to ensure reliable turn-on under load conditions.

Triacs Part Context

This part belongs to the QJxx08xH series of Alternistor TRIACs manufactured by Littelfuse. These devices integrate two SCRs in inverse parallel within a single package to provide bidirectional conduction. The series is engineered for robust performance in AC power switching applications requiring high surge tolerance.

Triacs Replacement Considerations

The Q4008VH3 is a comparable alternative within the same product family offering identical electrical ratings. Verify pinout compatibility and package dimensions before substitution. Confirm that any replacement maintains the required 400V and 8A specifications for the target application.