Q4015LTTP

Triacs Overview

The Littelfuse Q4015LTTP is a Teccor Quadrac device, which integrates 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 a TO-220-2 package providing electrical isolation of 2500V rms from leads to the mounting surface. Key electrical parameters include a rated repetitive off-state voltage (VDRM) of 400V, an on-state RMS current (ITRMS) of 15A, and a holding current maximum of 50mA. The device exhibits an on-state voltage of 1.6V and a closed-state leakage current of 10uA at VDRM.

Triacs Feature Summary

• Integrated Triac and Diac Trigger
• High Voltage Isolation
• Glass-Passivated Junctions

Triacs Applications

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

Triacs Procurement Notes

Verify the specific ordering suffix against official Littelfuse documentation to confirm package type and isolation ratings. Ensure compliance with RoHS and REACH requirements by checking the manufacturer's latest environmental declarations. Confirm that the TO-220-2 package variant matches the thermal and mechanical constraints of the target design before finalizing procurement.

Triacs Selection Notes

Select this component when designing circuits that require integrated gate triggering without discrete diacs. The 400V rating suits standard AC line applications. Verify that the 15A current capacity meets load requirements. Consider the 2500V rms isolation capability if external insulation from the heatsink is required. Ensure the operating temperature range aligns with system thermal management capabilities.

Triacs Part Context

This part belongs to the QxxxxLTx series of Teccor Quadrac devices developed by Littelfuse. These devices are designed to simplify assembly by eliminating the need for separate diac components. The series offers triac current capacities ranging from 4A to 15A with voltage ranges from 200V to 600V, all housed in electrically isolated TO-220 packages.

Triacs Replacement Considerations

Direct substitutes must be verified through Littelfuse cross-reference tools. Alternative Quadrac devices in the same series may offer different current or voltage ratings. Generic triac-diac combinations can replace this unit but will increase assembly complexity and board space requirements.