The EL817S1(C)(TA) is a single-channel phototransistor optocoupler manufactured by Everlight Electronics Co. Ltd. This device consists of an infrared emitting diode optically coupled to a phototransistor. It is designed to provide electrical isolation between input and output circuits, protecting sensitive components from high voltages or noisy signals. The EL817 series is widely used in various applications requiring galvanic isolation.

Applications

• Power supplies
• Industrial control equipment
• Microcontroller input isolation
• Signal transmission between circuits with different ground potentials
• Noise isolation in sensitive circuits

Features

• Single-channel optocoupler
• High isolation voltage
• Current transfer ratio (CTR) options available
• Compact package
• RoHS compliant

Benefits

• Provides electrical isolation between circuits
• Protects sensitive components from voltage spikes and surges
• Reduces noise and interference
• Offers design flexibility with various CTR options
• Complies with environmental regulations

Additional Details

The EL817S1(C)(TA) optocoupler typically features a high isolation voltage, often exceeding several thousand volts, providing robust protection against high-voltage transients. The current transfer ratio (CTR) is a key parameter, indicating the efficiency of the optocoupler in transferring current from the input diode to the output transistor; different grades (A, B, C, D) offer varying CTR ranges. The (C) likely indicates a specific CTR range for this particular variant. The (TA) denotes tape and reel packaging for automated assembly. This optocoupler is a versatile component for isolating and controlling signals in a wide range of electronic systems. It helps to improve system reliability and safety by preventing ground loops and isolating sensitive circuits from potentially damaging electrical events. The small package size allows for high-density mounting on circuit boards.