QK006LH4

Triacs Overview

The Littelfuse QK006LH4 is a bidirectional triac rated for 1000V and 6A. It belongs to the Qxx06xxH series, designed for high-voltage AC power control applications. The device features an isolated case configuration suitable for through-hole mounting in TO-220AB packages. Key electrical parameters include a maximum holding current of 35 mA and a gate trigger voltage up to 1.5 V. The component operates within a temperature range of -40°C to +125°C. It is recognized by UL standards. Note that this specific part number is listed as obsolete or end-of-life in distributor records.

Triacs Feature Summary

• High voltage blocking capability for demanding AC switching environments
• Isolated case design for safe thermal and electrical management
• Robust construction supporting high surge currents

Triacs Applications

• Industrial motor speed control systems
• High-power heating element regulation
• Solid-state relays requiring high voltage isolation

Triacs Procurement Notes

Verify availability status carefully as the QK006LH4 is marked as obsolete or discontinued in major distributor catalogs. Sourcing may be limited to surplus stock or last-time buys. Confirm exact package dimensions and pinout compatibility with existing PCB layouts before procurement. Check for RoHS compliance documentation if required for modern manufacturing standards.

Triacs Selection Notes

Select this component only when a 1000V rating is strictly necessary, as lower voltage alternatives like the Q6006LH4 (600V) are available and potentially more accessible. Ensure the application requires the specific 6A RMS current handling. Consider the TO-220AB package constraints for thermal dissipation requirements in the final assembly design.

Triacs Part Context

This triac is part of Littelfuse's general-purpose thyristor portfolio, specifically the Qxx06xxH family. These devices are engineered for reliable AC power switching in industrial and consumer appliances. The QK variant denotes the higher voltage class within the 6A current rating segment, distinguishing it from standard 600V versions.

Triacs Replacement Considerations

The Q6006LH4 is a similar 6A triac but rated for 600V instead of 1000V. Verify if the system voltage allows for this reduction. Other Littelfuse triacs in the same current class may serve as functional substitutes if voltage ratings align.