Q4015L556

Triacs Overview

The Littelfuse Q4015L556 is a three-terminal Triac belonging to the Teccor family, designed for general-purpose AC switching applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an RMS on-state current (IT(RMS)) of 15 A. The device utilizes a TO-220AB flange mount package with an isolated case connection, suitable for through-hole mounting. Key electrical characteristics include a maximum DC gate trigger current of 50 mA and a maximum DC gate trigger voltage of 1.3 V. The component operates within a temperature range of -40 °C to +125 °C and carries UL recognition certification.

Triacs Feature Summary

• Isolated case connection for direct heatsink mounting without additional insulation requirements
• High thermal stability supporting operation up to 125 °C junction temperature
• Robust gate drive capability with low trigger voltage requirements

Triacs Applications

• Solid-state relays requiring high current handling
• AC motor speed control circuits
• Lighting dimmer switches

Triacs Procurement Notes

Verify the specific suffix '556' against the manufacturer's official datasheet to confirm pinout configuration and exact mechanical dimensions. Ensure the ordering part number matches the required voltage and current ratings for the target application circuit design.

Triacs Selection Notes

Select this component when a 400 V rating and 15 A continuous current capacity are required in a standard TO-220AB flange package. Consider the 50 mA gate trigger current specification for driver interface compatibility. Verify that the isolated case feature aligns with the system's thermal management and electrical isolation strategy.

Triacs Part Context

This Triac is part of the broader Littelfuse Teccor thyristor portfolio, which provides various voltage and current ratings for power control. The Q4015L556 specifically addresses mid-power AC switching needs, offering a balance between current handling and gate sensitivity in a widely used industrial package format.

Triacs Replacement Considerations

Cross-reference with other 400 V, 15 A Triacs in TO-220AB packages from Littelfuse or competitors. Confirm that substitute devices match the 50 mA gate trigger current and isolated case specifications to ensure functional equivalence.