Q4008L5TP

Triacs Overview

The Littelfuse Q4008L5TP is a bidirectional triac from the Qxx08xx series, designed for AC switching and phase control applications. It features an RMS on-state current of 8 A and a rated repetitive off-state voltage (VDRM) of 400 V. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-220-2 through-hole package. Key electrical parameters include a maximum holding current of 50 mA, a gate trigger voltage of 2.5 V, and a gate trigger current ranging from 25 mA to 50 mA. Non-repetitive peak currents are specified at 83 A and 100 A, with an on-state voltage of 1.6 V and a leakage current of 50 uA under VDRM conditions.

Triacs Feature Summary

• Integrated diac trigger mechanism eliminates the need for external discrete components
• Electrically isolated TO-220 package removes requirement for separate insulators
• Glass-passivated junctions ensure long-term parameter stability and reliability

Triacs Applications

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

Triacs Procurement Notes

Verify the specific suffix 'L5' against official Littelfuse documentation to confirm exact gate trigger characteristics, as variations exist within the Q4008 family. Ensure the selected component matches the required voltage and current ratings for the target circuit design before finalizing procurement orders.

Triacs Selection Notes

Select this component for designs requiring integrated triggering without additional snubber networks or discrete diacs. Confirm that the 400 V rating aligns with the system's peak line voltage. Verify thermal management requirements for the TO-220 package given the 8 A continuous current capability and operating temperature limits.

Triacs Part Context

This part belongs to the Teccor Quadrac series by Littelfuse, which combines a triac and a diac in a single package. These devices are engineered for AC switching applications where noise immunity is critical. The series offers various current and voltage ratings to suit different power control needs while simplifying assembly processes.

Triacs Replacement Considerations

Consult official Littelfuse substitution guides for verified equivalents. Generic triacs may lack the integrated diac feature, requiring additional circuit components.