EL357N(TA)-G

Overview

The EL357N(TA)-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 continuous forward current of 50mA, and a high isolation voltage of 3750Vrms. The device operates over a wide temperature range of -55°C to +110°C with a typical rise time of 3µs and fall time of 4µs.

Feature Summary

• Provides electrical isolation between input and output circuits using infrared light transmission
• Features a compact 4-pin SOP surface-mount package for dense PCB layouts
• Offers high isolation voltage capability to prevent electromagnetic interference and leakage risks
• Ensures stable performance across a wide industrial operating temperature range

Applications

• Industrial control systems requiring signal isolation
• Communication equipment for noise immunity
• Power supply feedback loops
• Microcontroller input/output isolation

Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm exact electrical characteristics such as Current Transfer Ratio (CTR) bins or packaging options. Ensure the component meets required safety certifications like UL or VDE for the target application environment. Confirm RoHS compliance status if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when a small footprint and high isolation voltage are critical design constraints. Consider the phototransistor output type for applications requiring moderate switching speeds and simple interface logic. Evaluate the thermal management requirements given the 200mW total power dissipation limit and the specified operating temperature range for the intended enclosure conditions.

Part Context

This part belongs to the EL357N-G series of phototransistor optocouplers manufactured by Everlight Electronics. The series is designed for general-purpose isolation applications where size reduction and reliability are prioritized. The standard SOP-4 package allows for automated assembly in high-volume manufacturing environments while maintaining robust electrical separation between circuit stages.

Replacement Considerations

Compatible substitutes include the EL357N(A)(TA)-G and EL357N(B)(TA)-G variants from the same manufacturer family. These alternatives share identical pinouts and mechanical dimensions but may differ in Current Transfer Ratio (CTR) specifications. Verify CTR ranges before substitution to ensure compatibility with existing circuit gain requirements.