EL817M(D)-V

Overview

The EL817M(D)-V is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with an NPN phototransistor detector within a 4-pin DIP package featuring 0.4-inch (10.16mm) lead spacing. The device provides high isolation voltage of 5000 Vrms between input and output circuits. Key electrical parameters include a collector-emitter breakdown voltage of 35 V, maximum forward current of 60 mA, and a typical current transfer ratio ranging from 50% to 600%. It operates within a temperature range of -55°C to +110°C and complies with RoHS standards.

Feature Summary

• High isolation voltage capability of 5000 Vrms ensures robust signal transmission across isolated circuits.
• Wide current transfer ratio range allows for flexible gain configuration in various analog and digital applications.
• Extended operating temperature range supports reliable performance in demanding thermal environments.
• Lead spacing optimized for standard through-hole mounting on printed circuit boards.

Applications

• Industrial control systems requiring galvanic isolation
• Signal isolation in microprocessor-based circuits
• Power supply feedback loops
• Solid-state relay driver interfaces

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest datasheet to confirm lead form and packaging type. Ensure compliance with regional regulatory requirements such as RoHS and UL recognition numbers before integration into final products. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when wide lead spacing is required for mechanical stability or high-voltage creepage distance. Compare current transfer ratio specifications against load requirements to ensure adequate saturation. Consider thermal dissipation limits and ambient operating temperatures during circuit design to maintain reliability over the product lifecycle.

Part Context

This part belongs to the EL817 series of photocouplers, which are widely used for general-purpose isolation. The M suffix specifically denotes the 0.4-inch lead spacing variant, distinguishing it from standard 0.3-inch pitch versions. This series is recognized for its cost-effectiveness and availability in multiple certification packages.

Replacement Considerations

Direct substitutes include other EL817 variants with compatible pinouts and electrical characteristics. Verify that alternative parts match the 5000 Vrms isolation rating and 35 V collector-emitter voltage. Check if the replacement offers similar current transfer ratio ranges and operating temperature specifications.