Q4012RH5TP

Triacs Overview

The Littelfuse Q4012RH5TP is a bidirectional triac designed for power control applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (IT(RMS)) of 12 A. The device operates within a temperature range of -40 °C to +125 °C. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 50 mA. It exhibits an on-state voltage of 1.6 V and a leakage current of 10 µA at VDRM. The component is housed in an SMTO-263-2 surface-mount package.

Triacs Feature Summary

• High thermal stability with operation up to +125 °C
• Robust surge handling capability with non-repetitive peak currents up to 120 A
• Surface-mount design for automated assembly efficiency

Triacs Applications

• Solid-state relays
• Motor speed control circuits
• Lighting dimmer switches

Triacs Procurement Notes

Verify the specific suffix 'H5' against official Littelfuse documentation to confirm pinout and packaging details. Ensure compatibility with the target PCB footprint for the SMTO-263-2 package. Cross-reference datasheet revisions to validate electrical characteristics before finalizing procurement specifications.

Triacs Selection Notes

Select this component when a 400 V rating and 12 A continuous current are required in a compact surface-mount form factor. Compare the 1.3 V gate trigger voltage against microcontroller output capabilities to ensure reliable switching. Evaluate thermal management requirements given the 125 °C maximum junction temperature limit.

Triacs Part Context

This part belongs to the Littelfuse Qxx12xHx series of high-current triacs. It shares family characteristics with other variants in the line but is distinguished by its specific 400 V voltage rating and 12 A current capacity. The series is engineered for general-purpose AC power switching tasks.

Triacs Replacement Considerations

Direct substitutes may include the Q4012LH5TP or Q4012NH5TP from the same manufacturer, provided the package and electrical ratings match the design requirements.