L401E3

Triacs Overview

The L401E3 is a sensitive gate TRIAC manufactured by Littelfuse Inc., housed in a TO-92-3 through-hole package. It features an internal trigger mechanism with a maximum forward blocking voltage of 400 V and an RMS on-state current rating of 1 A. The device operates within a junction temperature range of -40°C to 125°C. Key electrical parameters include a maximum gate trigger current of 5 mA, a holding current of 5 mA, and a peak non-repetitive surge current of 16.7 A.

Triacs Feature Summary

• Sensitive gate design ensuring reliable triggering with low gate power requirements
• Internal trigger configuration for simplified circuit integration
• Robust thermal performance supporting operation up to 125°C junction temperature

Triacs Applications

• AC solid-state switching circuits
• Lower current heating controls
• Water valve actuation systems
• Solenoid control applications

Triacs Procurement Notes

Verify the specific Littelfuse datasheet revision to confirm exact electrical tolerances and mechanical dimensions prior to finalizing the design. Ensure that the TO-92-3 package footprint matches the target PCB layout. Confirm that the 400V voltage rating and 1A current capacity are sufficient for the intended load conditions and transient environments.

Triacs Selection Notes

Select this component when a logic-compatible or sensitive gate TRIAC is required for low-power AC control applications. The TO-92-3 package is suitable for prototyping and low-volume production where surface-mount options are not mandatory. Consider the 400V rating for standard line-voltage applications and verify that the 1A RMS current meets the continuous load requirements.

Triacs Part Context

The L401E3 belongs to Littelfuse's Low Power TRIAC series, which offers devices rated up to 1200V. This specific model is designed for lower current applications, providing a cost-effective solution for consumer electronics and home appliances. It serves as a direct replacement for obsolete parts like the Central Semiconductor CQ92D, maintaining similar electrical characteristics and package form factors.

Triacs Replacement Considerations

The Littelfuse L401E3 is documented as a substitute for the discontinued Central Semiconductor CQ92D. Both components share identical electrical ratings (400V, 1A) and the TO-92-3 package, facilitating drop-in replacements in existing designs without requiring schematic modifications.