QK025R5TP

Triacs Overview

The Littelfuse QK025R5TP is a bidirectional triac designed for high-voltage power control applications. It features a rated repetitive off-state voltage (VDRM) of 1 kV and an on-state RMS current (IT(RMS)) of 25 A. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-220-2 through-hole package. Key electrical characteristics include a maximum holding current of 100 mA, a gate trigger current (Igt) of 50 mA, and a gate trigger voltage (Vgt) of 2.5 V. The on-state voltage drop is specified at 1.8 V, with a non-repetitive peak surge current capability ranging from 167 A to 200 A.

Triacs Feature Summary

• High blocking voltage rating suitable for demanding AC power switching environments
• Robust thermal performance supporting operation up to 125°C junction temperature
• Sensitive gate configuration allowing direct interfacing with standard logic drivers

Triacs Applications

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

Triacs Procurement Notes

Verify the specific Littelfuse datasheet revision to confirm exact surge current ratings, as values may vary between 167 A and 200 A depending on pulse duration. Ensure the TO-220-2 mounting interface matches the target heatsink or PCB layout requirements before finalizing component selection.

Triacs Selection Notes

Select this component when a 1 kV blocking voltage is required alongside a 25 A continuous current capacity. The TO-220-2 package facilitates efficient heat dissipation for high-power applications. Verify that the 50 mA gate drive current aligns with the available driver circuit output capabilities.

Triacs Part Context

This part belongs to the Littelfuse Qxx25xx series of thyristors. The 'QK' prefix typically denotes a specific voltage and current combination within the company's general-purpose triac lineup, standardized for industrial reliability and consistent electrical performance across the family.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic replacements must match the 1 kV VDRM, 25 A IT(RMS), and TO-220-2 package constraints to ensure functional compatibility.