EL817S1(C)(TA)-V

Overview

The EL817S1(C)(TA)-V is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with an NPN phototransistor detector in a compact surface-mount package. 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 maximum collector current of 50 mA. The unit operates within a temperature range of -55°C to +110°C and features a nominal current transfer ratio of 200%.

Feature Summary

• High isolation voltage capability between input and output for enhanced safety
• Compact small outline surface-mount package design
• Wide operating temperature range suitable for demanding environments
• Compliant with lead-free and RoHS standards

Applications

• Signal isolation in industrial control systems
• Power supply feedback loops
• Communication interface isolation
• Microcontroller input/output isolation

Procurement Notes

Verify the specific suffix (C)(TA)-V against official Everlight documentation to confirm pinout orientation and tape-and-reel specifications. Ensure compatibility with existing PCB footprints and reflow soldering profiles. Confirm availability status as distribution channels may vary. Cross-reference approval numbers such as UL and VDE if regulatory compliance is required for the final assembly.

Selection Notes

Select this component when a surface-mount solution is required for galvanic isolation. Consider the 5000 Vrms isolation rating for applications requiring significant potential difference separation. Evaluate the 200% typical CTR against load requirements. Verify that the SMD package dimensions fit the mechanical constraints of the target design compared to through-hole alternatives.

Part Context

This part belongs to the EL817 series of optocouplers from Everlight. The series typically includes various packaging options including DIP and SMD variants. The 'S1' designation often indicates a specific pin configuration or creepage distance variant within the family. The 'V' suffix usually denotes RoHS compliance and halogen-free characteristics.

Replacement Considerations

Direct replacements should be sought from the same EL817 family or equivalent SMD transistor output optocouplers with matching 4-pin footprint and 5000 Vrms isolation. Verify pin-to-pin compatibility before substitution.