SFH620A-3

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Optoisolators – Transistor, Photovoltaic Output

The SFH620A-3 is an optoisolator product from Siemens that is typically used in industrial applications. It has a variety of characteristics that make it suitable for specific applications depending on the needs of the user.

The SFH620A-3 is a 5 pin, TTL compatible optoisolator with a transistor output. It operates as both a photovoltaic and a transistor output and is available in an industry standard DIP package. Additionally, this optoisolator has an isolation voltage of between 250 and 500 volts and an operational temperature range of -40 to +85 degrees Celsius. The working current of the SFH620A-3 varies between 10 to 100mA.

The transistor output provides low switching capacity, allowing for lower power consumption and higher efficiency. The output of the SFH620A-3 is CMOS compatible with a collector-emitter voltage of 30 volts. The input current for the SFH620A-3 is typically in the range of 1mA to 10mA. The optoisolator works by having the input and output circuits isolated by a silicon diode, while the output circuit is connected to an integrated LED.

The SFH620A-3 optoisolator is used mainly in industrial and automotive applications. It is suitable for switching off low voltage and current loads, such as a relay or a motor. The optoisolator can also be used to protect a circuit from electrical noise and to create a safety barrier in a system where there are safety considerations. The SFH620A-3 is also used in many devices where shielding and isolation are required, such as medical instruments. Additionally, the SFH620A-3 is sometimes used in military applications for the same purpose.

The way that the SFH620A-3 works is quite simple. When the LED in the optoisolator is exposed to current, a small current is allowed to flow through it. This current is then amplified by the light sensitive transistor, which in turn switches on the transistor output circuit. This output is then used to drive a low voltage or low current load.

The SFH620A-3 is a good choice for applications where isolation and noise protection is important. Its low current input and CMOS compatible output make it suitable for a variety of industrial, automotive, military and medical applications. Furthermore, it has a good isolation voltage and an extended temperature range, making it a good option for high temperature environments. The SFH620A-3 is also easy to install and configure, making it a popular choice for many different projects.

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