QJ8040KH7TP

Triacs Overview

The Littelfuse QJ8040KH7TP is a bidirectional triac designed for AC power control applications. It features an RMS on-state current of 40 A and a rated repetitive peak off-state voltage of 800 V. The device supports a non-repetitive peak on-state current of 500 A with a maximum on-state voltage of 1.6 V. Gate triggering requirements include a voltage of 1.3 V and a current of 100 mA. The component operates within a temperature range of -40°C to +150°C and utilizes an SMTO-218 through-hole package.

Triacs Feature Summary

• Bidirectional AC switching capability for phase control
• High thermal stability with extended operating temperature range
• Integrated gate trigger mechanism for reliable activation

Triacs Applications

• AC motor speed controls
• Temperature modulation systems
• Lighting dimmer circuits

Triacs Procurement Notes

Verify the specific suffix 'H7' against official Littelfuse documentation to confirm exact manufacturing lot or revision details, as ordering suffixes can indicate variations in packaging or testing standards. Ensure compatibility with existing thermal management designs given the 40A rating and SMTO-218 form factor. Cross-reference datasheet parameters for gate sensitivity and holding current to validate circuit design integrity before procurement.

Triacs Selection Notes

Select this component for applications requiring robust 800V blocking capability and 40A continuous current handling in high-temperature environments. Compare gate trigger characteristics against driver output capabilities to ensure reliable turn-on. Consider the SMTO-218 package constraints for PCB layout and heat sinking requirements relative to similar series members like the QJ8040JH7TP or QJ8040K4TP.

Triacs Part Context

This part belongs to the QJxx40xx series of TRIACs from Littelfuse, which are engineered for general-purpose AC power switching. The series offers standardized electrical characteristics across various voltage ratings, facilitating design consistency. The QJ8040KH7TP specifically targets industrial and consumer appliances needing reliable phase control with high surge tolerance.

Triacs Replacement Considerations

The QJ8040JH7TP and QJ8040K4TP are direct family members with identical core electrical ratings (40A, 800V). Verify if the suffix difference implies only packaging or minor parameter shifts. Other 40A 800V TRIACs in SMTO-218 packages may serve as alternatives if pinout and thermal specifications align.