QK040K7TP

Triacs Overview

The Littelfuse QK040K7TP is a Triac from the Qxx40xx series, rated for 1000 V repetitive peak off-state voltage and 40 A RMS on-state current. It utilizes an IsoPlan package in TO-218AC form factor with through-hole mounting. Key electrical parameters include a maximum gate trigger voltage of 2.5 V, gate trigger current of 100 mA, and holding current of 120 mA. The device operates within a junction temperature range of -40°C to +125°C, features a non-repetitive surge current capacity of 335 A or 400 A depending on frequency, and maintains an on-state voltage of 1.8 V.

Triacs Feature Summary

• High-voltage isolation capability suitable for demanding power control environments
• Robust thermal management via flange-mount design for efficient heat dissipation
• Sensitive gate drive requirements facilitating direct interface with logic circuits

Triacs Applications

• Industrial motor speed control systems
• Solid-state relay implementations
• High-power AC switching applications

Triacs Procurement Notes

Verify component authenticity by cross-referencing the manufacturer's part number and date codes against official Littelfuse documentation. Ensure the received units match the specified TO-218AC package and electrical ratings. Confirm RoHS compliance status through the provided datasheet before integration into final assemblies.

Triacs Selection Notes

Select this component when a 1000 V rating is required for AC load switching. Compare against lower voltage variants like Q6040K7TP if system voltage permits. Consider the TO-218AC package constraints for PCB layout and heatsinking requirements relative to the 40 A continuous current capability.

Triacs Part Context

This Triac belongs to the Qxx40xx family, which standardizes the 40 A current handling across various voltage ratings. The 'K' suffix typically denotes the specific 1000 V blocking voltage variant within this series, distinguishing it from other voltage classes while maintaining identical thermal and mechanical footprints.

Triacs Replacement Considerations

Direct substitutes within the same series include Q6040K7TP for 600 V applications. Verify pinout compatibility and thermal resistance characteristics when considering alternative manufacturers' equivalents for critical designs.