Q4004L3TP

Triacs Overview

The Littelfuse Q4004L3TP is a Teccor brand bidirectional triac in the Qxx04xx series, housed in a TO-220-2 through-hole package. It features a 4 A RMS on-state current and a 400 V rated repetitive off-state voltage. The device supports a non-repetitive surge current of 55 A at 60 Hz and maintains an on-state voltage of 1.6 V. Gate triggering parameters include a maximum gate trigger voltage of 2 V and a gate trigger current range of 10 mA to 25 mA. With a holding current maximum of 20 mA and leakage current of 10 µA, it operates within a temperature range of -40°C to +125°C.

Triacs Feature Summary

• Integrated diac trigger mechanism eliminates external discrete components for simplified circuit assembly.
• Electrically isolated TO-220 package provides 2500 V rms isolation between leads and mounting surface.
• Glass-passivated junctions ensure long-term parameter stability and device reliability.

Triacs Applications

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

Triacs Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number with official Littelfuse documentation. Confirm that the specific suffix matches the required electrical characteristics, as variations may exist within the product family. Ensure compliance with relevant regulatory standards such as RoHS before integration into final assemblies.

Triacs Selection Notes

Select this component when a 4 A current rating and 400 V blocking voltage are sufficient for the load requirements. The integrated diac feature makes it suitable for designs aiming to reduce bill-of-materials count compared to discrete triac-diac combinations. Verify that the thermal management strategy accommodates the TO-220 package's heat dissipation capabilities under continuous operating conditions.

Triacs Part Context

This device belongs to the Teccor Quadrac series, which combines a triac and a diac trigger in a single package. Manufactured by Littelfuse, these devices are designed to simplify AC power control circuits by removing the need for separate trigger components. The series offers various current and voltage ratings to accommodate different power levels in industrial and consumer applications.

Triacs Replacement Considerations

Direct substitutes within the same series include other Q4004 variants with differing suffixes, which may indicate changes in packaging or specific testing criteria. Cross-series replacements require matching the 4 A RMS current, 400 V voltage rating, and TO-220 footprint while verifying gate sensitivity compatibility.

Triacs FAQ

What is the primary advantage of the Q4004L3TP over a standard triac?

It includes an integrated diac trigger, eliminating the need for a separate discrete diac component and reducing assembly complexity.

How does the package provide electrical safety?

The TO-220 package is electrically isolated to 2500 V rms from the leads to the mounting surface, removing the need for external insulators.

What is the maximum gate trigger current specified?

The gate trigger current ranges from 10 mA to 25 mA according to distributor specifications.