QK040KH6TP

Triacs Overview

The Littelfuse QK040KH6TP is a TRIAC Alternistor housed in an isolated TO-218AC (TO-218) flange mount package. It features a single configuration with three terminals and supports operation between -40 °C and +125 °C. Key electrical parameters include a maximum DC gate trigger current of 80 mA, a maximum DC gate trigger voltage of 1.3 V, and a maximum holding current of 80 mA. The device has a minimum critical rate of rise of commutating voltage of 30 V/us and a maximum leakage current of 5 mA. It is RoHS compliant and UL recognized.

Triacs Feature Summary

• Isolated flange mount construction for secure thermal management
• High dv/dt capability to prevent false triggering during rapid voltage changes
• UL recognized certification for safety compliance

Triacs Applications

• Industrial motor control systems
• High-power AC switching applications
• Solid-state relay designs requiring isolation

Triacs Procurement Notes

Verify the specific suffix 'H6TP' against official Littelfuse documentation to confirm lead times and packaging details. Ensure the TO-218AC mounting interface matches your thermal design requirements. Confirm RoHS and UL recognition status directly from the manufacturer's datasheet before finalizing procurement specifications.

Triacs Selection Notes

Select this component when high dv/dt immunity and isolated mounting are required. Compare the 80 mA gate trigger current against available driver capabilities. Verify that the 125 °C operating temperature range meets the environmental conditions of the target application. Ensure the TO-218 package fits within the mechanical constraints of the assembly.

Triacs Part Context

This part belongs to the Littelfuse TRIAC Alternistor family, designed for robust power switching. The TO-218AC package provides a standardized mounting solution for industrial environments. The specific model integrates high reliability features suitable for demanding AC power control tasks where standard TRIACs might fail due to voltage transients.

Triacs Replacement Considerations

Check for direct equivalents in the same Littelfuse series with identical pinouts and thermal characteristics. Verify that any substitute maintains the 30 V/us dv/dt rating and 80 mA gate trigger specifications. Ensure the replacement also offers isolated flange mounting to preserve system safety and thermal performance.