Q2004L3

Triacs Overview

The Littelfuse Q2004L3 is a bidirectional triac in the Teccor Quadrac series, integrating a diac trigger within a single TO-220 package. It features a 4 A RMS on-state current and a 400 V repetitive peak off-state voltage. The device supports a 55 A surge current and operates between -40°C and 125°C. Key electrical parameters include a maximum gate trigger current of 10 mA and a holding current of 20 mA. The TO-220 package provides 2500 V rms isolation from the mounting surface, eliminating the need for external insulators.

Triacs Feature Summary

• Integrated Diac Trigger: Combines a triac and diac in one package to simplify circuit design and reduce assembly time.
• Electrical Isolation: The TO-220 package offers 2500 V rms isolation between leads and the mounting surface, removing the requirement for separate insulators.
• Glass-Passivated Junctions: Ensures long-term device reliability and parameter stability through protected junction technology.

Triacs Applications

• AC switching and phase control applications
• Speed controls for motors
• Temperature modulation controls
• Lighting controls requiring noise immunity

Triacs Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm exact electrical tolerances and packaging variations. Ensure the selected variant meets the required isolation voltage and thermal management specifications for the target application environment.

Triacs Selection Notes

Select this component for AC phase control circuits where integrated triggering simplifies the design. The 400 V rating suits standard line voltages, while the 4 A current capacity supports moderate power loads. Consider the TO-220 package for its inherent isolation benefits and ease of heat sinking.

Triacs Part Context

This part belongs to the Teccor Quadrac series by Littelfuse, designed as a bidirectional AC switch. These devices integrate a diac trigger to eliminate discrete components. The series covers current capacities from 4 A to 15 A and voltage ranges up to 600 V, offering a compact solution for AC control tasks.

Triacs Replacement Considerations

Direct substitutes may include other Triac-Diac combinations in TO-220 packages with matching 4 A/400 V ratings. Verify gate trigger characteristics and isolation voltage compatibility before substitution.

Triacs FAQ

Does the Q2004L3 require an external snubber network?

Standard Quadrac devices typically do not require a snubber network, unlike alternistor variants which are specifically designed to eliminate snubber requirements.

What is the isolation voltage of the TO-220 package?

The TO-220 package provides 2500 V rms isolation from the leads to the mounting surface, allowing direct mounting without additional insulators.

How does the integrated diac benefit the circuit design?

The integrated diac saves assembly time and cost by eliminating the need to purchase and assemble a discrete diac alongside the gated triac.