QK012LH5

Triacs Overview

The Littelfuse QK012LH5 is a bidirectional triac from the Qxx12xHx series, designed for AC power switching and phase control. It features a 1 kV rated repetitive peak off-state voltage (VDRM) and an RMS on-state current of 12 A. The device operates within a temperature range of -40°C to +125°C and utilizes an SMTO-263-2 package. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger current of 50 mA, and an on-state voltage of 1.6 V. Non-repetitive surge currents are rated at 110 A and 120 A.

Triacs Feature Summary

• Glass-passivated junctions ensure long-term parameter stability and reliability.
• Electrically isolated L-package construction allows for efficient heat dissipation under high insulation voltages.
• Capable of operation in the first, second, and third quadrants for high dv/dt applications.
• Requires only a small gate activation pulse per half-cycle for switching.

Triacs Applications

• AC solid state switches
• Lighting dimmers
• Motor speed controls
• Temperature modulation controls

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm pinout and isolation requirements. Ensure the procurement channel provides valid RoHS compliance certificates. Confirm that the SMTO-263-2 package matches the target PCB footprint before ordering.

Triacs Selection Notes

Select this component when a 12 A RMS current rating and 1000 V blocking voltage are required. The electrically isolated tab facilitates mounting to heatsinks without additional insulators. Verify that the 50 mA gate trigger current aligns with the available drive circuit capabilities.

Triacs Part Context

This part belongs to the Qxx12xHx series of Triacs manufactured by Littelfuse. The series is characterized by glass-passivated junctions and high voltage capabilities up to 1000 V. These devices are engineered for robust performance in industrial and consumer AC switching environments.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic replacements may differ in thermal resistance or gate sensitivity. Validate any alternative part against the original datasheet specifications before implementation.

Triacs FAQ

What is the maximum operating temperature?

The maximum operating temperature is +125°C.

Does the device require a snubber network?

The datasheet indicates it is suitable for extreme inductive load applications where snubber networks might be omitted, depending on specific circuit conditions.

What is the package type?

The component is housed in an SMTO-263-2 package.