Q4010L553

Triacs Overview

The Littelfuse Q4010L553 is an Alternistor TRIAC designed for AC switching and phase control applications. It features a 400V repetitive peak off-state voltage (V(DRM)) and supports a maximum RMS on-state current of 10A. The device utilizes a TO-220AB flange mount package with three pins, providing electrical isolation between the leads and the mounting surface. It operates within a temperature range of -40°C to 125°C and includes glass-passivated junctions for parameter stability.

Triacs Feature Summary

• Alternistor technology eliminates the need for external snubber networks
• Integrated diac trigger simplifies circuit design by removing discrete components
• Electrically isolated package removes requirement for separate insulators

Triacs Applications

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

Triacs Procurement Notes

Verify component authenticity through official Littelfuse channels or authorized distributors. Confirm RoHS compliance status and check for specific UL recognition markings on the package. Ensure the ordering suffix matches the required pin configuration and thermal characteristics before finalizing purchase orders.

Triacs Selection Notes

Select this component when designing circuits that require integrated triggering without external snubbers. The 400V rating suits low-voltage AC mains applications. Verify that the 10A RMS current capacity meets load requirements and that the TO-220AB package allows adequate heat dissipation for the intended duty cycle.

Triacs Part Context

This part belongs to the Teccor Quadrac series, which combines a triac and diac in one package. The 'L' designation indicates Alternistor technology, while 'Q' identifies the Quadrac family. This integration reduces assembly time and cost compared to discrete triac-diac combinations.

Triacs Replacement Considerations

Direct substitutes include other Littelfuse Q4010 variants with matching voltage and current ratings. Verify pinout compatibility and thermal resistance values when cross-referencing with competitor TRIACs offering similar integrated trigger capabilities.