Q2040K7TP

Triacs Overview

The Littelfuse Q2040K7TP is a bidirectional triac from the Qxx40xx series, designed for high-power AC switching applications. It features an RMS on-state current (It RMS) of 40 A and a rated repetitive peak off-state voltage (VDRM) of 400 V. The device operates within a junction temperature range of -40°C to +125°C and utilizes an SMTO-218 through-hole package. Key electrical characteristics include a maximum holding current (Ih) of 120 mA, gate trigger voltage (Vgt) of 2.5 V, and gate trigger current (Igt) of 100 mA. The on-state voltage is specified at 1.8 V, with non-repetitive peak currents rated at 335 A and 400 A.

Triacs Feature Summary

• High current handling capability with 40 A RMS rating for robust power control
• Insensitive gate structure ensuring reliable triggering across varying conditions
• Thermal resilience supporting operation up to +125°C junction temperature

Triacs Applications

• Industrial motor speed control systems
• Solid-state relay implementations
• AC power regulation circuits

Triacs Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number Littelfuse Q2040K7TP against official datasheets. Confirm package type SMTO-218 and electrical ratings match design requirements. Ensure compliance with RoHS directives as indicated in manufacturer documentation before integration into final assemblies.

Triacs Selection Notes

Select this triac when a 400 V blocking voltage and 40 A continuous current are required in a through-hole configuration. Compare against the Q2040J7 variant which offers identical current ratings but a lower 200 V voltage rating. Ensure gate drive circuitry can supply the specified 100 mA trigger current for reliable turn-on.

Triacs Part Context

This component belongs to the Qxx40xx family of triacs manufactured by Littelfuse. The series provides standardized electrical parameters across different voltage ratings, allowing designers to scale voltage capabilities while maintaining consistent current handling and package dimensions for modular power electronics designs.

Triacs Replacement Considerations

The Q2040J7 is a related variant within the same series offering 200 V instead of 400 V. Verify voltage requirements carefully before substitution. No other direct equivalent part numbers are confirmed in available public documentation.