The EL816M is a high-performance phototransistor optocoupler manufactured by Everlight Electronics. It comprises an infrared emitting diode (IRED) optically coupled to a phototransistor. This configuration facilitates electrical isolation between the input (diode) and output (transistor) circuits, making it suitable for applications requiring safety and signal isolation.

Applications

• Programmable Logic Controllers (PLCs): For isolated input/output modules.
• Microcontroller Interfaces: Protecting microcontroller inputs from high-voltage transients.
• Power Supply Isolation: Providing galvanic isolation in power supply circuits.
• Industrial Control Systems: Isolating control signals in noisy industrial environments.
• Consumer Electronics: Used in various consumer devices for safety and isolation purposes.

Features

• High Isolation Voltage: Offers significant electrical isolation between the input and output.
• High Collector-Emitter Voltage (VCEO): Ensures robust performance under various voltage conditions.
• Compact Package: Available in a compact package for space-constrained applications.
• Fast Switching Speed: Enables rapid signal transfer with minimal delay.
• RoHS Compliant: Complies with environmental standards for lead-free manufacturing.

Benefits

• Enhanced Safety: Galvanic isolation provides enhanced safety by preventing high-voltage hazards.
• Noise Immunity: Reduces noise interference in sensitive circuits.
• Signal Isolation: Isolates sensitive circuits from high-voltage or noisy environments.
• Improved System Reliability: Protects control systems from voltage spikes and surges.
• Simplified Design: Facilitates easier integration into existing circuits.

Additional Details

The EL816M is typically supplied in a standard DIP package. Key specifications include a forward voltage of approximately 1.2V for the IRED and a collector-emitter breakdown voltage of around 80V for the phototransistor. The operating temperature range is typically between -30°C and +100°C. The current transfer ratio (CTR) is a critical parameter and varies depending on the specific grade of the EL816M. Designers should consult the datasheet for precise CTR values and other performance characteristics. The device's reliability and robust design make it suitable for diverse applications requiring electrical isolation.