EL205

Overview

The EL205 is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features an NPN phototransistor output with a base terminal for sensitivity control, housed in an 8-SOP package. The device provides an insulation voltage of 3750 Vrms and operates within a temperature range of -55°C to 110°C. Key electrical parameters include a collector-emitter voltage rating of 80V and a maximum forward current of 60mA. The component is moisture sensitive and complies with RoHS standards.

Feature Summary

• Integrates an infrared emitting diode with an NPN phototransistor for signal isolation
• Includes a dedicated base pin on the phototransistor to allow for adjustable sensitivity or speed optimization
• Provides high-voltage isolation capability between input and output circuits

Applications

• Industrial control systems requiring signal isolation
• Solid-state relay driver circuits
• Communication equipment interface isolation

Procurement Notes

Verify the specific suffix designation (such as TA or TB) when ordering, as these indicate variations in packaging or tape-and-reel specifications rather than functional differences. Confirm that the procurement channel sources genuine Everlight components to ensure compliance with moisture sensitivity handling requirements and RoHS standards. Cross-reference the manufacturer part number with official distributor catalogs to avoid substitution errors.

Selection Notes

Select this component when a single-channel isolation solution with adjustable response characteristics is required. The presence of the base terminal distinguishes it from standard phototransistor couplers, offering flexibility in circuit design for speed or gain adjustments. Ensure the selected package variant matches the automated assembly requirements, such as reel packaging for surface-mount technology processes.

Part Context

The EL205 belongs to Everlight's family of transistor output optocouplers designed for general-purpose isolation applications. It complements other models like the EL206 and EL207, which offer similar architectures but may differ in specific electrical ratings or package configurations. This series is widely utilized in environments demanding reliable galvanic isolation between low-voltage control logic and higher-voltage power stages.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.