QK012RH5

Triacs Overview

The Littelfuse QK012RH5 is a bidirectional triac designed for AC switching and phase control applications. It features a rated repetitive off-state voltage (VDRM) of 1 kV and an on-state RMS current (ITRMS) of 12 A. The device operates within a temperature range of -40°C to +125°C and utilizes an SMTO-263-2 surface-mount package. Key electrical parameters include a holding current maximum of 50 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 50 mA. Non-repetitive peak on-state currents are specified at 110 A and 120 A, with an on-state voltage of 1.6 V and a leakage current of 10 uA under VDRM conditions.

Triacs Feature Summary

• Bidirectional AC switching capability for phase control
• Glass-passivated junctions for parameter stability
• Surface-mount construction for automated assembly

Triacs Applications

• AC speed controls
• Temperature modulation controls
• Lighting controls requiring noise immunity

Triacs Procurement Notes

Verify the specific suffix 'H5' against official Littelfuse documentation to confirm exact pinout and thermal characteristics. Ensure compatibility with SMTO-263-2 footprints during PCB layout. Confirm RoHS compliance status through the manufacturer's latest certification records before finalizing component selection.

Triacs Selection Notes

Select this component when high-voltage isolation and moderate current handling are required in compact designs. Evaluate thermal management requirements given the 12 A rating and surface-mount form factor. Compare gate sensitivity specifications against driver circuit capabilities to ensure reliable triggering across the full operating temperature range.

Triacs Part Context

This part belongs to the Qxx12xHx series of Triacs manufactured by Littelfuse. These devices are engineered for robust performance in industrial and consumer AC power control systems. The series emphasizes reliability through glass-passivated junction technology and standardized packaging for efficient integration into modern electronic assemblies.

Triacs Replacement Considerations

Consult Littelfuse official substitution guides for verified equivalents. Generic triac replacements may differ in gate sensitivity or thermal resistance. Verify that any substitute maintains the 1 kV voltage rating and 12 A current capacity while fitting the SMTO-263-2 package constraints.