EL357NC(TA)-G

Overview

The EL357NC(TA)-G is a single-channel transistor output optocoupler from Everlight Electronics. It integrates an infrared LED and a phototransistor in a compact SOP-4 surface-mount package with a 2.54mm pin pitch. Key electrical parameters include a 3750Vrms isolation voltage, a collector-emitter saturation voltage of 100mV at 20mA/1mA, and a load voltage of 80V. The device supports a DC input type with a forward voltage of 1.2V and a maximum forward current of 50mA. Output characteristics feature a minimum current transfer ratio (CTR) of 200% and a maximum of 400% at 5mA. Switching times are specified as 3µs rise time and 4µs fall time. Operating temperature ranges from -55°C to +110°C.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits via optical coupling.
• Utilizes a compact four-pin small outline package designed for dense PCB layouts.
• Ensures stable signal transmission across wide industrial temperature extremes.

Applications

• Industrial control systems requiring circuit isolation
• Communication equipment signal transmission
• Power supply unit feedback loops

Procurement Notes

Verify the specific suffix designation against official Everlight documentation to confirm exact performance grades and packaging specifications. Ensure compatibility with RoHS3 standards and check moisture sensitivity levels prior to assembly. Confirm that the selected variant meets the required isolation voltage and thermal operating range for the target application environment.

Selection Notes

Select this component when a low-profile surface-mount solution is required for galvanic isolation in space-constrained designs. The high CTR range accommodates various gain requirements in feedback applications. Consider the switching speed and thermal stability for environments demanding reliable operation under varying load conditions and ambient temperatures.

Part Context

This part belongs to the EL357N-G series of transistor output optocouplers manufactured by Everlight Electronics. The series is characterized by its ultra-small SOP footprint and robust isolation capabilities. It serves as a standard component for general-purpose signal isolation in modern electronic assemblies where size reduction and reliability are prioritized.

Replacement Considerations

Cross-reference with other SOP-4 transistor output optocouplers offering similar 3750Vrms isolation and comparable CTR ranges. Verify pinout compatibility and thermal dissipation characteristics before substitution.

FAQ

What is the maximum load voltage supported by the phototransistor?

The device supports a maximum load voltage of 80V.

Does the EL357NC(TA)-G support AC input signals?

No, the datasheet specifies the input type as DC.