QK012RH5TP

Triacs Overview

The Littelfuse QK012RH5TP is a bidirectional triac designed for high-voltage power control applications. It features a rated repetitive off-state voltage (VDRM) of 800 V and an RMS on-state current (It RMS) of 12 A. The device operates within a junction 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. The on-state voltage drop is specified at 1.6 V, with a non-repetitive peak on-state current capability of 110 A or 120 A depending on the specific test condition. Leakage current in the off-state is limited to 10 µA at VDRM.

Triacs Feature Summary

• High voltage blocking capability suitable for industrial AC power switching
• Robust thermal performance with a maximum operating temperature of 125 °C
• Sensitive gate drive requirements facilitating direct interface with logic circuits

Triacs Applications

• Industrial motor speed control systems
• Solid-state relays for AC load switching
• Lighting dimmer circuits for commercial fixtures

Triacs Procurement Notes

Verify the exact suffix H5TP against the manufacturer's latest datasheet to confirm pinout and packaging specifications. Ensure the procurement channel provides original Littelfuse documentation. Confirm RoHS compliance status through official certification records prior to integration into regulated assemblies.

Triacs Selection Notes

Select this component when an 800 V rating is required instead of higher voltage variants like the QK series. The TO-220-2 package facilitates heatsinking for continuous 12 A loads. Verify that the 50 mA gate trigger current aligns with the driving circuit's output capabilities to ensure reliable turn-on under all temperature conditions.

Triacs Part Context

This part belongs to the Qxx12xHx family of Littelfuse triacs, characterized by 12 A current handling and sensitive gate structures. The RH5TP designation specifically indicates the 800 V voltage class and TO-220-2 surface mount/direct mount package configuration, distinguishing it from the higher voltage QK series.

Triacs Replacement Considerations

Direct replacements must match the 800 V / 12 A specification and TO-220-2 footprint. Verify gate sensitivity parameters against the original design constraints before substituting with other manufacturers' triacs.