Q4006R455

Triacs Overview

The Littelfuse Q4006R455 is a Quadrac device from the Teccor brand, integrating a triac and a diac trigger within a single package. This component serves as a bidirectional AC switch with gate control for either polarity of main terminal voltage. It operates in a TO-220 package, which provides electrical isolation of 2500V rms from the leads to the mounting surface. The device features glass-passivated junctions to ensure long-term reliability and parameter stability. It supports on-state currents ranging from 4A to 15A and voltage capabilities up to 600V, designed for applications requiring noise immunity.

Triacs Feature Summary

• Integrates a triac and diac trigger in one package to reduce assembly complexity
• Bidirectional AC switching capability with gate control for both polarities
• Electrically isolated TO-220 package eliminating need for external insulators
• Glass-passivated junctions for enhanced reliability and stability

Triacs Applications

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

Triacs Procurement Notes

Verify the specific suffix codes against official Littelfuse documentation to confirm exact ratings and package variations. Ensure the selected variant meets the required isolation voltage and current specifications for the target application. Cross-reference part numbers with authorized distributors to confirm availability and authenticity before procurement.

Triacs Selection Notes

Select this component when space-saving integration of a triac and diac is required without discrete assembly. Consider the 2500V rms isolation of the TO-220 package if external insulation is undesirable. Verify that the on-state current and voltage ratings align with the load requirements. Check for special order options if higher isolation voltages are needed.

Triacs Part Context

This part belongs to the Teccor Quadrac series by Littelfuse, designed to simplify AC phase control circuits. Unlike standard triacs, it includes an internal diac trigger, removing the need for separate components. The series is characterized by robust construction and suitability for industrial control environments where reliability and noise immunity are critical.

Triacs Replacement Considerations

Direct substitutes must match the integrated triac-diac functionality and TO-220 isolation. Generic triacs require additional discrete diac components and layout changes. Verify compatibility with existing snubber networks, noting that alternistor variants may eliminate snubber requirements.