Q8012LH5TP

Triacs Overview

The Littelfuse Q8012LH5TP is a bidirectional triac designed for AC power control applications. It features an 800V repetitive peak off-state voltage and a 12A RMS on-state current rating. The device utilizes a sensitive gate structure with a maximum DC gate trigger current of 50mA, enabling direct interface with logic circuits. It is housed in an isolated TO-220AB package to facilitate thermal management and electrical isolation from heatsinks. Key electrical characteristics include a maximum holding current of 15mA and a typical on-state voltage of 1.6V at rated current.

Triacs Feature Summary

• Sensitive gate configuration allows for low-power triggering from standard logic interfaces.
• Isolated TO-220AB package construction provides electrical insulation between the terminal and mounting hardware.
• High surge current capability supports robust operation in inductive load switching environments.

Triacs Applications

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

Triacs Procurement Notes

Verify the specific suffix LH5TP against the manufacturer's official datasheet to confirm the exact gate sensitivity class and packaging variant. Ensure that the ordering documentation explicitly references the Littelfuse part number to avoid confusion with similar series components. Cross-reference the package outline dimensions with your PCB footprint requirements prior to finalizing procurement orders.

Triacs Selection Notes

Select this component when an 800V blocking voltage and 12A continuous current capacity are required for AC switching duties. The sensitive gate characteristic makes it suitable for microcontroller-driven applications where minimal drive current is available. Confirm that the thermal design accommodates the power dissipation associated with the 1.6V on-state voltage drop under full load conditions.

Triacs Part Context

This device belongs to the Qxx12xHx series of high-performance triacs from Littelfuse. The series is engineered for general-purpose AC power control, offering a balance of high current handling and reliable switching performance. It serves as a core semiconductor switch in various power electronics architectures requiring robust AC regulation.

Triacs Replacement Considerations

Direct replacements must match the 800V/12A rating and sensitive gate specification. Verify pinout compatibility and thermal resistance values before substituting with other manufacturers' triacs in the same package style.

Triacs FAQ

What is the maximum DC gate trigger current for the Q8012LH5TP?

The maximum DC gate trigger current is 50mA, classifying it as a sensitive gate triac suitable for direct logic interfacing.

Does the TO-220AB package provide electrical isolation?

Yes, the isolated TO-220AB package ensures electrical insulation between the main terminals and the mounting flange.

What is the typical on-state voltage drop at rated current?

The typical on-state voltage is 1.6V when conducting the rated 12A RMS current.