Q4025L658

Triacs Overview

The Littelfuse Q4025L658 is a 400V, 25A Alternistor triac housed in a TO-220-3 package. It features a snubberless design with a maximum on-state voltage of 1.8V and gate trigger current of 50mA. The device supports a repetitive off-state voltage of 400V, non-repetitive peak on-state currents of 208A and 250A, and operates within a temperature range of -40°C to +125°C.

Triacs Feature Summary

• Snubberless Alternistor architecture for simplified circuit design
• High thermal stability suitable for demanding AC switching applications
• Isolated tab configuration for efficient heat dissipation

Triacs Applications

• Motor speed control systems
• Temperature modulation circuits
• AC phase control applications

Triacs Procurement Notes

Verify component authenticity through authorized Littelfuse channels or certified distributors. Confirm the specific manufacturing date code and lot traceability against project requirements. Ensure the TO-220-3 package variant matches the intended PCB footprint and thermal management strategy before finalizing procurement orders.

Triacs Selection Notes

Select this component for high-power AC switching where snubberless operation reduces external component count. The 25A RMS rating and 400V blocking capability suit industrial loads. Consider the isolated tab for mounting efficiency. Verify that the 50mA gate trigger current aligns with the available drive signal strength in the control circuitry.

Triacs Part Context

This part belongs to the Littelfuse low-power TRIAC series designed for up to 1200V ratings. It serves as a bi-directional solid-state switch for AC applications. The product line emphasizes robust performance in motor and heating control environments, providing reliable switching capabilities for various industrial and commercial equipment.

Triacs Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.