EL357NC-G

Overview

The EL357NC-G is a single-channel phototransistor output optocoupler from Everlight Electronics. It integrates an infrared emitting diode and a phototransistor detector within a compact 4-pin SOP surface-mount package. Key electrical parameters include a maximum collector-emitter voltage of 80V, a DC forward current limit of 50mA, and a typical forward voltage drop of 1.2V. The device provides a high isolation voltage of 3750Vrms between input and output circuits. It features a minimum Current Transfer Ratio (CTR) of 200% at 5mA, with a total power dissipation rating of 200mW. Operating temperatures range from -55°C to +110°C.

Feature Summary

• Provides robust electrical isolation between input and output circuits using infrared light transmission.
• Features a compact 4-pin SOP surface-mount footprint designed for high-density PCB layouts.
• Delivers high current transfer efficiency suitable for precise signal coupling applications.
• Ensures operational stability across a wide industrial temperature range.

Applications

• Industrial control systems requiring signal isolation
• Communication equipment interface circuits
• Power supply feedback loop isolation

Procurement Notes

Verify the specific suffix code against official Everlight documentation to confirm exact CTR binning and packaging specifications. Ensure compatibility with RoHS compliance requirements for your target market. Confirm that the SOP-4 package dimensions align with your PCB footprint design rules before finalizing procurement orders.

Selection Notes

Select this component when high isolation voltage and compact size are critical constraints. The transistor output type is suitable for digital switching or analog signal transmission where moderate speed is acceptable. Consider the CTR range and operating temperature limits to ensure performance stability in the intended environment compared to alternative logic gate outputs.

Part Context

This part belongs to the EL357N-G series of ultra-small SOP phototransistor optocouplers. The series is engineered for applications demanding reliable galvanic isolation in space-constrained designs. Everlight utilizes advanced semiconductor processes to maintain consistent performance characteristics across the product line while adhering to international safety standards.

Replacement Considerations

Direct substitutes may include other 4-pin SOP phototransistor optocouplers with matching 3750Vrms isolation and similar pinout configurations. Verify that replacement parts meet the same voltage ratings and thermal specifications to maintain circuit integrity without redesigning the isolation barrier.