Q4012LH5

Triacs Overview

The Littelfuse Q4012LH5 is a bidirectional triac belonging to the Qxx10xHx series, designed for general-purpose power control applications. It features a maximum repetitive peak off-state voltage (VDRM) of 400V and an on-state current (IT(RMS)) rating of 10A. The device operates with a gate trigger current range of 50mA to 50mA and exhibits a low on-state voltage of 1.6V. It is housed in a TO-220-2 package, providing robust thermal performance for industrial and consumer electronics. The component ensures reliable switching with a holding current specification suitable for stable operation in AC load circuits.

Triacs Feature Summary

• Bidirectional conduction capability for AC power control
• High thermal stability via TO-220-2 packaging
• Low on-state voltage for reduced power loss
• Robust gate triggering characteristics

Triacs Applications

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

Triacs Procurement Notes

Verify the specific datasheet revision for the Q4012LH5 model to confirm exact electrical tolerances and mechanical dimensions before integration. Ensure compatibility with existing thermal management solutions given the TO-220-2 form factor. Cross-reference manufacturer documentation for any updates regarding RoHS compliance or material declarations to meet regulatory requirements.

Triacs Selection Notes

Select this component when a 400V rated triac with 10A continuous current capacity is required. The TO-220-2 package facilitates easy mounting to heat sinks for high-power dissipation scenarios. Consider the gate trigger current specifications to ensure adequate drive signal strength from the control circuitry for reliable turn-on under varying load conditions.

Triacs Part Context

This part belongs to Littelfuse's Qxx10xHx series of triacs, which are engineered for general-purpose AC switching. The series offers a balance of voltage and current ratings suitable for various power control needs. The Q4012LH5 specifically provides a 400V blocking capability, distinguishing it from higher voltage variants within the same family while maintaining the standard 10A current handling.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for direct equivalents. Verify pinout compatibility and thermal resistance values when replacing with components from other manufacturers. Ensure that any substitute part meets or exceeds the 400V VDRM and 10A IT(RMS) specifications.