QK040J7TP

Triacs Overview

The Littelfuse QK040J7TP is a bidirectional triac from the Qxx40xx series, rated for 600 V repetitive peak off-state voltage and 40 A RMS on-state current. It utilizes an isolated gate structure with a gate trigger current of 100 mA and a gate trigger voltage of 2.5 V. The device features a maximum on-state voltage of 1.8 V and a holding current of 120 mA. It operates within a temperature range of -40 °C to +125 °C and is housed in an SMTO-218 through-hole package.

Triacs Feature Summary

• Isolated gate structure for enhanced noise immunity
• High surge current capability for robust operation
• Through-hole mounting for secure PCB integration

Triacs Applications

• AC motor speed control circuits
• Solid-state relay designs
• Lighting dimmer applications

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm voltage ratings and pinout configurations. Ensure compatibility with existing thermal management solutions given the SMTO-218 package constraints. Cross-reference datasheet parameters with circuit requirements before finalizing component selection.

Triacs Selection Notes

Select this component when a 600 V rating is required for AC power control applications. Compare against other series members like QK040K7TP if higher voltage isolation is needed. Evaluate thermal dissipation requirements based on the 40 A RMS current rating and ambient operating conditions.

Triacs Part Context

This part belongs to the Littelfuse Teccor Qxx40xx series of high-power triacs. The series offers various voltage ratings including 600 V, 800 V, and 1 kV options. All variants share similar current handling capabilities and packaging styles, differing primarily in blocking voltage specifications.

Triacs Replacement Considerations

Direct substitutes include other Littelfuse triacs from the same series with identical current ratings but different voltage codes, such as Q6040J7TP or Q8040J7TP, provided the system voltage requirements align with their respective ratings.