EL816(M)

Overview

The EL816(M) is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It consists of an infrared emitting diode optically coupled to an NPN phototransistor detector. The device provides high isolation voltage between input and output terminals, rated at 5000 Vrms. It features a current transfer ratio ranging from 50% to 600% when tested at a forward current of 5mA and collector-emitter voltage of 5V. The component supports a maximum operating temperature of +110°C and a minimum of -55°C. It is available in compact small outline packages, including SMD options, and complies with RoHS standards.

Feature Summary

• Optical coupling between infrared LED and NPN phototransistor for signal transmission
• High insulation voltage capability of 5000 Vrms between input and output circuits
• Wide current transfer ratio range supporting various logic interface requirements
• Compliant with lead-free manufacturing and RoHS environmental directives

Applications

• Signal transmission between circuits of different potentials and impedances
• Programmable controllers and industrial automation systems
• Telecommunication equipment interface isolation
• System appliances and measuring instruments requiring electrical isolation

Procurement Notes

Verify the specific package variant (DIP or SMD) and suffix codes against the official Everlight datasheet before ordering. Confirm that the requested part matches the required current transfer ratio bin if strict gain specifications are necessary for the design. Check for any regional distribution restrictions as availability may vary by location. Ensure compliance with local import regulations regarding electronic components.

Selection Notes

Select this component when galvanic isolation is required between low-voltage control signals and higher-voltage load circuits. The NPN phototransistor output is suitable for sinking current applications. Consider the thermal management requirements given the wide operating temperature range. Verify that the creepage distance meets the safety standards applicable to the target enclosure design.

Part Context

The EL816 series represents a family of photo-couplers designed for general-purpose isolation tasks. This specific model utilizes a standard four-pin configuration common in legacy and modern designs. It serves as a bridge between digital logic levels and power stages, ensuring circuit protection against voltage spikes and ground loops in sensitive electronic environments.

Replacement Considerations

Public confirmed substitute part numbers: None identified.