Q8004L452

Triacs Overview

The Littelfuse Q8004L452 is a QUADRAC device from the QxxxxLTx series, integrating a triac and a diac trigger within a single package. It functions as a bidirectional AC switch with gate control for either polarity of main terminal voltage. The component features glass-passivated junctions to ensure long-term reliability and parameter stability. Designed for noise-immune applications, it eliminates the need for discrete components or external snubber networks in specific variants.

Triacs Feature Summary

• Integrates a triac and diac trigger in one package
• Bidirectional AC switching capability
• Gate controlled for either polarity of main terminal voltage
• Glass-passivated junctions for reliability

Triacs Applications

• Speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the exact suffix against official Littelfuse documentation to confirm specific electrical ratings and package variations. Ensure the selected variant matches the required current and voltage specifications for the target application. Confirm RoHS compliance status if required by the manufacturing process. Cross-reference the part number with the latest datasheet to validate active product status and agency approvals.

Triacs Selection Notes

Select this component for AC phase control applications requiring integrated triggering without discrete diacs. Consider the TO-220 package isolation requirements if mounting to a heatsink. Evaluate the noise immunity benefits over standard triac-diac combinations. Verify that the integrated design meets the specific thermal and electrical constraints of the circuit design.

Triacs Part Context

This part belongs to the Teccor QUADRAC series, which combines a triac and diac into a single unit to simplify assembly and reduce component count. These devices are designed for AC switching and phase control where noise immunity is critical. The series offers various current and voltage ratings to suit different power levels.

Triacs Replacement Considerations

Direct replacements must be verified against the official Littelfuse substitution guide. Generic triac-diac combinations may require additional circuitry such as snubber networks unless specified otherwise. Ensure any substitute maintains the same package type and isolation voltage ratings.