Q2008LT

Triacs Overview

The Littelfuse Q2008LT is a Quadrac device from the Teccor brand, integrating a triac and an internal diac trigger within a single package. This bidirectional AC switch operates with a gate control mechanism for either polarity of main terminal voltage. The component features glass-passivated junctions to ensure long-term reliability and parameter stability. It is designed for AC switching and phase control applications requiring noise immunity. The device utilizes a TO-220 package which provides electrical isolation of 2500V rms from the leads to the mounting surface.

Triacs Feature Summary

• Integrates a triac and diac trigger in one package to reduce assembly time and cost
• Bidirectional AC switching capability with gate control for either main terminal voltage polarity
• Glass-passivated junctions for enhanced long-term device reliability and parameter stability
• TO-220 package offers 2500V rms electrical isolation between leads and mounting surface

Triacs Applications

• Speed controls
• Temperature modulation controls
• Lighting controls

Triacs Procurement Notes

Verify the specific part number against official Littelfuse documentation to confirm current availability and manufacturing status. Ensure that the required voltage and current ratings align with the application's operational parameters. Check for any specific ordering suffixes that may indicate custom design variations or special packaging options not covered in standard listings.

Triacs Selection Notes

Select this component when a combined triac and diac solution is needed to simplify circuit design and save assembly time. Consider the TO-220 package size and the 2500V rms isolation requirement for mounting configurations. Evaluate the need for noise immunity in AC switching environments. Confirm that the integrated diac trigger characteristics match the phase control requirements without external snubber networks if using the alternistor variant.

Triacs Part Context

The Q2008LT belongs to the QxxxxLTx series of Quadrac devices developed by Littelfuse under the Teccor brand. These devices are engineered to replace discrete diac and gated triac assemblies. The series includes variants such as the QxxxxLTH alternistor which eliminates the need for a snubber network. All devices in this family share the characteristic of combining two components into a single bidirectional AC switch.

Triacs Replacement Considerations

Direct replacement requires verifying the on-state current and blocking voltage ratings match the original design specifications. Since the QxxxxLTH variant eliminates snubber networks, ensure the replacement does not introduce unintended circuit behavior if the original design relied on specific snubber characteristics. Consult factory data for custom design variations.