QK016LH4

Triacs Overview

The Littelfuse QK016LH4 is a bidirectional triac belonging to the Qxx16xHx series, 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 16 A. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-220-2 package. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger current of 35 mA, and a gate trigger voltage of 2 V. The on-state voltage is specified at 1.6 V, with a maximum off-state leakage current of 5 µA.

Triacs Feature Summary

• High voltage blocking capability suitable for demanding AC power switching environments
• Robust thermal performance supporting operation up to 125°C junction temperature
• Standardized gate triggering characteristics for reliable interface with control circuitry

Triacs Applications

• Industrial motor speed control systems
• Solid-state relays requiring high voltage isolation
• AC power regulation circuits in heavy machinery

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm exact electrical tolerances and packaging options. Ensure the procurement channel provides valid traceability for industrial-grade components. Cross-reference the part number with the latest datasheet revisions to confirm availability status and compliance with current environmental regulations such as RoHS and REACH requirements before finalizing orders.

Triacs Selection Notes

Select this component when designing circuits requiring 1 kV blocking voltage and 16 A continuous current handling. Verify that the gate drive circuit can supply the required 35 mA trigger current at 2 V. Consider the thermal management requirements associated with the TO-220-2 package for the intended operating environment. Ensure the application does not exceed the non-repetitive peak current limits defined in the datasheet.

Triacs Part Context

This triac is part of the Qxx16xHx family from Littelfuse, which offers various voltage ratings within the same current and package configuration. Similar parts in this series include the Q8016LH4TP for 800 V applications and the QK016LH4TP variant. The family shares common mechanical dimensions and basic electrical characteristics, differing primarily in voltage ratings and specific manufacturing batches.

Triacs Replacement Considerations

Direct replacements must match the 1 kV rating, 16 A current capacity, and TO-220-2 package. Verify compatibility with existing gate drive requirements. Consult Littelfuse or authorized distributors for confirmed substitute part numbers that meet identical electrical specifications.