VO615A-4X018T Isolators

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Optoisolators are devices used to electrically isolate two circuits from each other while allowing them to be connected optically. One of the most common type of optoisolators are optocouplers with a transistor photovoltaic output. The VO615A-4X018T optocoupler is an example of a transistor photovoltaic output optoisolator.

The VO615A-4X018T optocoupler has its own unique construction and operation when compared to other optoisolators. Its four terminals are separated into an input side (terminals 1-2) and an output side (terminals 3-4). The optocoupler’s internal construction consists of an infrared-emitting diode optically coupled to a phototransistor. When a voltage is applied between terminals 1-2, the diode produces light, energizing the phototransistor which, in turn, closes a switch across the output terminals (3-4). When the opposite polarity voltage is applied across 1-2 the phototransistor turns off, the output terminals 3-4 become open-circuited.

The VO615A-4X018T optocoupler has an application field that mainly concerns the protection of circuits from external stimulus. Since the optocoupler is extremely effective at electrically isolating signals, it can be used in situations where the isolation of electronics from hazardous energized components is a necessity. An optoisolator also helps prevent transient signals from interfering in a circuit, including any parasitic capacitance or inductance.

Other key features of the VO615A-4X018T optocoupler include a wide operating temperature range from -55°C to +125°C and a low control current of 25mA. The optocoupler has a maximum collector-emitter voltage of 20V and an isolation voltage between the input and output of at least 1000Vrms. It also has a maximum current transfer ratio of 500%. The optocoupler’s power dissipation is also incredibly low at 0.5W. The VO615A-4X018T optocoupler is an excellent example of a transistor photovoltaic output optoisolator that is capable of electrically isolating circuits while protecting them from external stimulus. This optocoupler provides a high degree of reliability due to its insulation resistance and low control current, and has a wide range of features to suit a variety of applications.

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