Q4006LH4

Triacs Overview

The Littelfuse Q4006LH4 is a bidirectional triac designed for AC power control applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 6 A. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-220AB through-hole package with three leads. Key electrical characteristics include a maximum holding current of 35 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 35 mA. The on-state voltage is specified at 1.6 V, while the off-state leakage current remains at 10 uA under VDRM conditions.

Triacs Feature Summary

• High thermal stability supporting operation up to 125°C
• Robust construction in a standard TO-220AB plastic package
• Sensitive gate drive requirements for efficient triggering

Triacs Applications

• AC motor speed control circuits
• Solid-state relay designs
• Lighting dimmer modules

Triacs Procurement Notes

Verify the specific suffix 'H4' against the manufacturer's official datasheet to confirm pinout and isolation specifications. Ensure the procurement channel provides original Littelfuse documentation to validate RoHS compliance and traceability. Cross-reference the part number with authorized distributors to avoid counterfeit components.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 6 A continuous current capacity are required in a through-hole format. Compare gate sensitivity parameters against alternative triacs if low-power microcontroller interfaces are used. Evaluate thermal management needs based on the 6 A RMS rating and the thermal resistance of the TO-220AB package.

Triacs Part Context

This part belongs to the Qxx06xxH series of high-performance triacs from Littelfuse. The series is characterized by sensitive gate triggers and robust surge handling capabilities. It serves as a variant within the broader family of thyristor devices optimized for general-purpose AC switching tasks.

Triacs Replacement Considerations

Check for direct substitutes such as the Q4006LH4TP for tape-and-reel packaging or other manufacturers offering equivalent 400V/6A TO-220 triacs. Verify that replacement parts match the 35 mA gate trigger current and 1.6 V on-state voltage to ensure circuit compatibility.