QK008R5

Triacs Overview

The Littelfuse QK008R5 is a bidirectional triac designed for AC power control applications. It features an RMS on-state current of 8 A and a rated repetitive off-state voltage (VDRM) of 800 V. The device operates within a temperature range of -40°C to +125°C and utilizes an SMTO-263-2 surface-mount package. Key electrical characteristics include a maximum holding current of 50 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 50 mA. Non-repetitive peak on-state currents are specified at 83 A and 100 A under different conditions.

Triacs Feature Summary

• Bidirectional switching capability for alternating current circuits
• Surface-mount construction for automated PCB assembly
• High thermal stability across extended industrial temperature ranges

Triacs Applications

• Solid-state relays
• AC motor speed control systems
• Lighting dimmer circuits

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with existing board layouts and thermal management requirements before finalizing component selection.

Triacs Selection Notes

Evaluate the 800 V blocking voltage against peak line voltages to ensure adequate safety margins. Confirm that the 8 A RMS rating accommodates both steady-state loads and inrush currents typical of the intended application without exceeding thermal limits.

Triacs Part Context

This component belongs to the Qxx08xHx series of triacs from Littelfuse. The series provides standardized solutions for general-purpose AC power switching, offering consistent performance metrics across similar current and voltage ratings within the product family.

Triacs Replacement Considerations

The QK008NH4RP is a related variant within the same manufacturer portfolio. Verify pinout compatibility and specific parameter differences before substituting.