Q4025R6

Triacs Overview

The Littelfuse Q4025R6 is a bidirectional triac designed for AC power control applications. It features a 400 V rated repetitive off-state voltage (VDRM) and supports an on-state RMS current (It RMS) of 25 A. 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 100 mA, a gate trigger voltage of 2.5 V, and a gate trigger current of 80 mA. Non-repetitive peak on-state currents are specified at 208 A and 250 A under different pulse conditions.

Triacs Feature Summary

• Sensitive gate structure enabling direct interfacing with microprocessors and logic circuits
• High thermal stability supporting operation up to +125 °C junction temperature
• Robust surge current capability suitable for inductive load switching

Triacs Applications

• Solid-state relays for industrial automation
• AC motor speed control systems
• Lighting dimmer circuits

Triacs Procurement Notes

Verify component authenticity against Littelfuse official documentation prior to integration. Confirm that the specific ordering suffix corresponds to the required package and compliance standards. Ensure supply chain sources provide valid traceability records to mitigate counterfeit risks during procurement.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 25 A continuous current rating are required in a through-hole configuration. Evaluate thermal management requirements based on the 1.8 V on-state voltage drop. Compare gate sensitivity specifications against available drive circuit capabilities to ensure reliable triggering under varying load conditions.

Triacs Part Context

This part belongs to the Qxx25xx series of high-power triacs manufactured by Littelfuse. The series is engineered for general-purpose AC switching tasks requiring robust performance in compact packages. The Q4025R6 specifically denotes the 400 V variant within this 25 A current family.

Triacs Replacement Considerations

Cross-reference with other 400 V, 25 A triacs in TO-220 packages from Littelfuse or alternative manufacturers. Verify pinout compatibility and thermal resistance values before substitution.