Q4008VH3TP

Triacs Overview

The Littelfuse Q4008VH3TP 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 operates within a temperature range of -40°C to +150°C and utilizes a TO-251-3 (DPAK) surface-mount package. Key electrical characteristics include a maximum gate trigger voltage of 1.3 V, a gate trigger current of 10 mA, and a holding current of 15 mA. It exhibits a typical on-state voltage of 1.5 V and a minimum critical rate of rise of off-state voltage (dv/dt) of 20 V/µs.

Triacs Feature Summary

• High reliability construction suitable for demanding industrial environments
• Bidirectional switching capability with integrated gate control
• Robust thermal performance supporting operation up to 150°C junction temperature

Triacs Applications

• Industrial motor speed control systems
• Solid-state relay implementations
• General purpose AC power switching circuits

Triacs Procurement Notes

Verify the specific suffix 'TP' against the official Littelfuse datasheet to confirm tape-and-reel packaging requirements. Ensure the ordering part number matches the exact voltage and current ratings required by the design specifications. Confirm RoHS compliance status through the manufacturer's latest documentation before finalizing procurement orders.

Triacs Selection Notes

Select this component when a surface-mount TRIAC with 400V blocking capability and 8A continuous current handling is required. The TO-251 package offers a compact footprint compared to traditional leaded alternatives. Evaluate the thermal resistance of the PCB layout to ensure the junction temperature remains within the specified 150°C limit under full load conditions.

Triacs Part Context

This part belongs to the QJxx08xH series of Alternistors from Littelfuse. These devices are engineered as high-performance replacements for standard TRIACs in applications requiring improved ruggedness and switching reliability. The product line focuses on providing robust solutions for power control in industrial and commercial equipment.

Triacs Replacement Considerations

The Q4008VH3 is the equivalent leaded version of this component. Verify pinout compatibility and thermal dissipation differences between the TO-251 surface-mount package and the leaded alternative during board redesign or sourcing substitution.