QK012LH5TP

Triacs Overview

The Littelfuse QK012LH5TP is a bidirectional thyristor (triac) from the Qxx12xHx series, designed for high-voltage AC power switching applications. It features an RMS on-state current of 12 A and a rated repetitive off-state voltage of 1 kV. The device operates within a temperature range of -40°C to +125°C and utilizes an SMTO-263-2 surface-mount package. Key electrical parameters include a maximum gate trigger current of 50 mA across all quadrants, a holding current of 50 mA, and a non-repetitive surge current capability of up to 120 A.

Triacs Feature Summary

• High dv/dt capability suitable for demanding inductive loads
• Glass-passivated junction for enhanced reliability
• Electrical insulation with UL certification for safety isolation

Triacs Applications

• AC solid-state switches
• Lighting dimmers and control circuits
• Motor speed regulation systems

Triacs Procurement Notes

Verify the specific suffix 'TP' against official Littelfuse documentation to confirm tape-and-reel packaging requirements versus tube packaging. Ensure the selected component matches the required thermal management specifications for the SMTO-263-2 package during integration.

Triacs Selection Notes

Select this component when a 1 kV blocking voltage and 12 A continuous current are required in a compact surface-mount form factor. Consider the 50 mA gate drive requirement and ensure the circuit provides sufficient dv/dt protection if driving highly inductive loads without external snubbers.

Triacs Part Context

This part belongs to the Qxx12xHx series of triacs, which are engineered for general-purpose AC power control. The series offers a balance of high voltage handling and moderate current capacity, making it suitable for consumer appliances and industrial control panels where reliable switching is critical.

Triacs Replacement Considerations

Consult Littelfuse datasheets for direct pin-compatible alternatives within the same series or other manufacturers offering equivalent 12A/1000V SMTO-263 triacs. Verify that any substitute maintains the same gate trigger characteristics and thermal resistance values.