SFH601-4X009T

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Optoisolators - Transistor, Photovoltaic Output, offer excellent electrical isolation between input and output circuits. The SFH601-4X009T is a reliable, high performance isolation device designed for a wide range of applications. This device has a photovoltaic output transistor, allowing high speed data transmission without the need for long cables.

Structural Design

The SFH601-4X009T is an optocoupler with a transistor output stage and a multicolor indicator LED. It consists of a gallium arsenide infrared emitting diode (IRED) with series and parallel connected silicon photodiodes and a silicon NPN transistor connected in a Darlington configuration. The optocoupler has a zero-cross compatible LED with an integrated high-voltage limiter to provide protection against short-term over-voltage conditions. The device is provided in a surface-mount package with five electrical connection pads.

Working Principal and Electrical Characteristics

This optoisolator works by converting an input signal from the input circuit into optical energy, which is then converted back into electrical energy in the output circuit. In the SFH601-4X009T, an input signal to the diode causes the diode to emit photons in the visible spectrum, which are then detected by the photodiodes. The photodiodes convert the photons into current, which is then amplified by the transistor, producing an output signal in the output circuit.

The SFH601-4X009T has an AC/DC conversion ratio of 400V/mW, enabling the device to provide high voltage isolation of up to 1,500V. It also features high frequency noise immunity, a wide temperature range up to 105°C, and an extended storage temperature range between -40°C and 145°C. In addition, the device has fast switching speed, with a maximum rise and fall times of 36 ns and 27 ns, respectively.

Application Field

The SFH601-4X009T is commonly used for motor speed control, solar panel control, inverters, power supplies, lighting and LED displays, and industrial automation. The device can also be used to provide isolation between circuits in telecommunications equipment, medical equipment, and measurement and control equipment. The device’s wide operating temperature range makes it suitable for more extreme environments, such as automotive and aviation applications.

Conclusion

The SFH601-4X009T is a reliable, high-performance optoisolator with a photovoltaic output and a wide operating temperature range. It is designed for applications that need high speed data transmission and high voltage isolation, such as motor speed control, solar panel control, and telecommunications equipment. The device offers fast switching time and excellent noise immunity, making it an ideal choice for a variety of applications.

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