The ELQ3H4(TA)-G Optocoupler with SOP-16_4.4mm RoHS is a solid state electrical component manufactured by Everlight, and is commonly used in signal transmission and isolation applications. It consists of a light-emitting diode (LED) and a phototransistor in a leaded device, and has two terminals: an LED terminal (anode) and a detector terminal (cathode). Its purpose is to transfer a signal between two circuits while providing galvanic isolation between the two circuits, thus preventing electrical field buildup and reducing noise interference. It meets EU RoHS Directive 2011/65/EU, and is available in multiple versions and packages, including SOP-16_4.4mm RoHS.