EL121N(B)(TA)-V

Overview

The EL121N(B)(TA)-V is a single-channel phototransistor optocoupler manufactured by Everlight Electronics. It features an infrared emitting diode coupled to a silicon phototransistor in a compact 4-SOP (2.54mm) surface-mount package. The device provides electrical isolation with a rated insulation voltage of 3750Vrms. This component is designed for applications requiring reliable signal transmission across isolated circuits while maintaining high safety standards.

Feature Summary

• Photovoltaic output configuration for reliable isolation
• Compact 4-SMD Gull Wing surface-mount packaging
• High insulation voltage rating for safety compliance

Applications

• General-purpose signal isolation
• Microprocessor system interfacing
• Power supply feedback loops

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest documentation, as variations such as EL121N(BC)(TA)-V may exist within the product family. Confirm that the 4-SOP package dimensions and pinout align with the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a low-profile surface-mount solution is required for galvanic isolation. Ensure the input current and collector-emitter voltage ratings meet the circuit design specifications. Consider the thermal management capabilities of the SOP package for the intended operating environment.

Part Context

This part belongs to Everlight's line of transistor-output optocouplers. These devices are widely used in industrial and consumer electronics for noise immunity and ground loop elimination. The SOP format facilitates automated assembly processes.

Replacement Considerations

Consult official substitution lists for compatible equivalents. Verify pin compatibility and electrical parameters before replacing.