Q4012LH2TP

Triacs Overview

The Q4012LH2TP is a Triac manufactured by Littelfuse under the Teccor brand. It features a 400V voltage rating and supports an on-state current of 12A. The device utilizes a 10-10-10mA gate trigger configuration, indicating specific sensitivity levels for different quadrants of operation. This component is designed as a bidirectional AC switch with gate control for either polarity of main terminal voltage.

Triacs Feature Summary

• Integrated Alternistor design eliminates the need for external snubber networks
• Glass-passivated junctions ensure long-term device reliability and parameter stability
• Electrically isolated TO-220 package removes requirement for separate insulators

Triacs Applications

• AC switching and phase control applications
• Speed controls for motors
• Temperature modulation controls
• Lighting controls requiring noise immunity

Triacs Procurement Notes

Verify the exact part number against official Littelfuse documentation to confirm the 10-10-10mA gate trigger specification and 400V rating. Ensure the TO-220 package variant matches the required isolation voltage of 2500V rms from leads to mounting surface. Cross-reference datasheets to distinguish between standard Triac and Quadrac variants within the QxxxxLTx series.

Triacs Selection Notes

Select this component for applications requiring integrated Alternistor functionality to simplify circuit design by removing snubber networks. Consider the glass-passivated junction technology for environments demanding high parameter stability. Verify that the 12A on-state current capacity meets the load requirements and that the 400V blocking voltage aligns with the system's peak inverse voltage.

Triacs Part Context

This device belongs to the QxxxxLTx series, which includes Teccor brand Quadrac devices. These components integrate a diac trigger or Alternistor structure within the same package as the triac. The series is engineered to reduce assembly time and cost by eliminating discrete components, offering a compact solution for AC power control systems.

Triacs Replacement Considerations

Consult the QxxxxLTx series table for alternatives with similar voltage and current ratings. Verify if other part numbers in the series offer different gate sensitivities or higher voltage capabilities while maintaining the same TO-220 package and Alternistor features.