L4004F51

Triacs Overview

The Littelfuse L4004F51 is a four-quadrant logic level TRIAC designed for sensitive gate triggering applications. It features a maximum repetitive peak off-state voltage (VDRM) of 400 V and an RMS on-state current (IT(RMS)) rating of 4 A. The device is housed in a TO-202AB (TO-92) three-pin package with an inline configuration. It operates within a junction temperature range of -40 °C to +110 °C. The component is RoHS compliant and utilizes glass-passivated junctions for parameter stability.

Triacs Feature Summary

• Four-quadrant gating capability ensures reliable control by digital circuitry using positive or negative pulses.
• Sensitive gate design allows direct interface with low-power logic outputs without additional driver circuits.
• Glass-passivated junction construction provides long-term reliability and protection against environmental stress.

Triacs Applications

• Control of AC loads via microprocessor or digital logic interfaces
• Solid-state relay input stages requiring isolated switching
• Lighting dimmer circuits utilizing logic-level trigger signals

Triacs Procurement Notes

Verify the specific suffix code (e.g., F, R, TP) associated with the L4004F51 part number to confirm the exact packaging type and terminal finish. Confirm RoHS compliance status through the manufacturer's latest documentation before integration into regulated assemblies.

Triacs Selection Notes

Select this component when a 400 V blocking voltage and 4 A continuous current are required in a compact through-hole package. Ensure the driving circuit can supply sufficient gate current to meet the sensitivity requirements across all four quadrants of operation.

Triacs Part Context

This device belongs to the Teccor L4004 series of sensitive gate TRIACs manufactured by Littelfuse. The series offers various voltage ratings and current capabilities, with the L4004 variant specifically targeting 400 V / 4 A applications in standard TO-202AB packages.

Triacs Replacement Considerations

Equivalent devices from other manufacturers must match the 400 V VDRM, 4 A IT(RMS), and TO-202AB package dimensions. Verify that substitute parts also guarantee four-quadrant sensitivity to ensure compatibility with existing logic-level drive circuits.