The EL816S1(D)(TA)(AT) is a phototransistor optocoupler manufactured by Everlight Electronics Co., Ltd. Optocouplers, also known as optoisolators, provide electrical isolation between circuits, allowing signals to be transmitted without a direct electrical connection. This is particularly useful in applications where high voltage or noisy environments could damage sensitive components or create safety hazards.

Applications

• Power Supplies: Used in switching power supplies to provide feedback and control signals while maintaining electrical isolation between the primary and secondary sides.
• Industrial Control Systems: Integrated into programmable logic controllers (PLCs) and other industrial control equipment for isolating input and output signals.
• Motor Control: Employed in motor drives and controllers to isolate control signals from the high-voltage motor circuitry.
• Data Communication: Used in data communication interfaces to isolate data signals and protect against voltage transients.
• Medical Equipment: Integrated into medical devices to ensure patient safety by providing electrical isolation.

Features

• High Isolation Voltage: Provides a high level of electrical isolation between the input and output circuits.
• Current Transfer Ratio (CTR): Offers a specified current transfer ratio, ensuring efficient signal transfer.
• Low Input Current: Requires a low input current for activation, reducing power consumption.
• Compact Package: Available in a compact package for easy integration into space-constrained designs.
• Safety Certifications: Meets various safety standards, such as UL and VDE, ensuring safe operation.

Benefits

• Electrical Isolation: Protects sensitive circuits from high voltage and electrical noise.
• Improved System Reliability: Prevents ground loops and reduces the risk of damage from voltage transients.
• Enhanced Safety: Ensures safe operation in high-voltage environments.
• Simplified Circuit Design: Eliminates the need for complex isolation circuitry.
• Compact Footprint: Allows for integration into small form factor devices.

Additional Details

The EL816S1(D)(TA)(AT) optocoupler consists of an infrared emitting diode (IRED) and a phototransistor. When current flows through the IRED, it emits infrared light, which activates the phototransistor. The phototransistor then conducts current, transferring the signal to the output circuit. The electrical isolation between the input and output is achieved by the physical separation of the IRED and phototransistor. This optocoupler is designed for a wide range of operating temperatures and is available in various package options. The specific CTR values are dependent on the applied current, which ensures consistent output. The device is RoHS compliant. The suffix (D)(TA)(AT) likely refers to specific testing or tape and reel options.