SFH600-2

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Optoisolators, also known as optocouplers, are a form of electrical isolation used to interconnect discrete components in a signalaing system while providing galvanic isolation from one to the other. This helps to ensure noise immunity and prevents interference between the two systems. The SFH600-2 is one such optoisolator, with a transistor, photovoltaic output, and a range of applications.

This device has a 4N25 type optocoupler consisting of an infrared LED emitter, phototransistor detector, and a base resistor. It operates in the visible spectral range of 400 - 1100 nm, and the output transistor collector is connected directly to the optocoupler’s LED emitter. The device operates at a forward voltage of 1.3 - 1.7V with a current of no more than 30mA.

The photovoltaic output is ideal for applications such as interfacing digital logic or microprocessors with analog circuits, and for the isolation of high speed logic signals. It is also useful in motor control, switching circuits, regulating circuits, and relay string control. It features a low impedance collector-emitter and has a negligible saturation voltage, even at high input currents.

In operation, the infrared LED is driven by the signal source, such as a switch, logic gate or digital buffer. The phototransistor then converts the incoming signal into an output current in the transistor collector. The output current is proportional to the amount of light that reaches the optocoupler’s detector, making it ideal for high-speed switching applications. The output transistor also provides a fast rise time and fast response time.

The SFH600-2 optoisolator is also designed for convenient mounting, with a hermetically sealed rugged construction. This makes it suitable for various environments, including industrial and chemical. It has a maximum continuous operating temperature of 105°C and an insulation resistance of greater than 10^12Ω. This makes it ideal for electrical isolation in sensitive applications.

The SFH600-2 optoisolator is therefore a reliable and versatile means of providing electrical isolation between two components. With its 4N25 type optocoupler and photovoltaic output it is ideal for digital logic or microprocessor applications and for controlling relay strings. It also has a low impedance collector-emitter and is suitable for a range of different environments and operating temperatures.

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