EL3043

Overview

The EL3043 is a zero-crossing triac driver photocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with a zero-crossing detection circuit and a triac output, providing electrical isolation for AC load control applications. The device features a 6-pin DIP package and supports an operating temperature range from -55°C to +100°C. Key electrical specifications include a 5000 Vrms insulation voltage, a peak repetitive off-state voltage of 400 V, a forward current of 60 mA, and a forward voltage of 1.5 V.

Feature Summary

• Integrates a zero-crossing detection circuit to minimize electromagnetic interference during switching.
• Provides high-voltage isolation between input and output circuits via a 5000 Vrms dielectric barrier.
• Combines an infrared LED emitter with a triac output stage in a single compact component.

Applications

• Solid-state relays for AC power switching
• Motor speed controllers
• Lighting dimmer circuits

Procurement Notes

Verify the specific suffix (e.g., -V) against the datasheet to confirm package dimensions and compliance status. Ensure the supplier provides official documentation confirming the RoHS compliant status and lead-free characteristics. Cross-reference the manufacturer part number directly with Everlight Electronics to avoid counterfeit components.

Selection Notes

Select this component when zero-crossing switching is required to reduce noise in AC line applications. The 400 V output rating suits low-voltage AC loads. Verify that the 60 mA input current capability matches the driving logic levels. Consider the 6-DIP package constraints for PCB layout and thermal management within the specified temperature range.

Part Context

This device belongs to the EL304x series of zero-crossing triac driver optocouplers. It shares functional similarities with models like the EL3041 and EL3042 but is distinguished by its specific voltage ratings and internal zero-crossing timing characteristics designed for reliable AC phase control.

Replacement Considerations

Direct substitutes include the EL3041 and EL3042 from Everlight. Other manufacturers offer equivalent zero-crossing triac drivers, but pinout compatibility and insulation voltage ratings must be verified before substitution.