ELT3043

Triac, SCR Output Optoisolators Overview

The ELT3043 is a single-channel optoisolator manufactured by Everlight Electronics Co Ltd. It features a phototriac output with an integrated zero-crossing detection circuit, designed for precise switching applications. The device provides high electrical isolation with a rated insulation voltage of 5000 Vrms and supports a peak repetitive off-state voltage (VDRM) of 400 V. It operates within a temperature range of -55°C to +100°C. The component is available in various package configurations, including through-hole DIP-6 and surface-mount SMD formats, catering to diverse PCB layout requirements.

Triac, SCR Output Optoisolators Feature Summary

• Integrates a zero-crossing detection circuit to minimize electromagnetic interference during AC load switching
• Provides robust electrical isolation between input and output circuits via a 5000 Vrms insulation rating
• Features a phototriac output stage capable of driving triacs or SCRs directly
• Designed for reliable operation across a wide industrial temperature range

Triac, SCR Output Optoisolators Applications

• Solid-state relays for AC power control
• Motor speed controllers using phase-angle firing
• Lighting dimmer circuits for residential and commercial use
• Industrial process control systems requiring isolated AC switching

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix codes on the component marking to confirm the exact package type and tape/reel specifications, as variations exist between DIP and SMD versions. Ensure that the selected variant meets the required thermal management standards for the intended operating environment. Cross-reference the manufacturer's latest datasheet to confirm compliance with current RoHS directives and material declarations before finalizing procurement orders.

Triac, SCR Output Optoisolators Selection Notes

Select the ELT3043 when zero-crossing switching is required to reduce noise and stress on AC loads. Choose the appropriate package variant based on the manufacturing process, opting for through-hole DIP for manual assembly or reflow soldering constraints, and SMD variants for automated surface-mount production lines. Confirm that the 400 V blocking voltage aligns with the peak line voltage of the application circuit.

Triac, SCR Output Optoisolators Part Context

The ELT3043 belongs to Everlight's family of Triac and SCR output optocouplers. It shares functional similarities with models like the EL3043 but differs primarily in packaging and mounting style. This series is engineered for general-purpose AC switching applications where low EMI and high isolation are critical design parameters.

Triac, SCR Output Optoisolators Replacement Considerations

The EL3043 serves as a direct functional equivalent with identical electrical characteristics, differing only in its standard through-hole DIP-6 packaging compared to the ELT3043's available SMD options.