H11F33SD

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Optoisolators - Transistor, Photovoltaic Output are one of the most common devices used in a wide range of applications, from industrial equipment, security, aerospace and medical sectors. The H11F33SD is a type of optoisolator, commonly used as a signal isolation device, with a photo-emitting transistor (PET) output and a photovoltaic (PV) detection circuit. This makes it an ideal solution for applications which require high-voltage, low-current or high-current, low-voltage isolation, as well as for high signal-to-noise ratio applications.

The PET element in the H11F33SD optoisolator is a bistable NPN bipolar transistor, featuring a collector-emitter voltage rating higher than the voltage between the base and its emitter. A suitable current applied to its base allows the transistor to act as a switch, in turn allowing a current to flow from the sensor LED to the photodiode in the PV circuit. The transistor switch is non-polar, meaning it can be powered with either polarity, and can also be driven at speeds up to 500kHz.

The output of the H11F33SD optoisolator is an open-collector photovoltaic (PV) detection circuit. It provides a voltage drop of typically 0.1V, a rise time of 0.6μs, a fall time of 1.2μs, and rise-fall times which can be varied up to 30μs/60μs, depending on the model. The PV circuit also provides the optoisolator with isolation voltage ratings up to 11,000Vp, making it suitable for a variety of applications.

The H11F33SD optoisolator is available in both unipolar and multipolar versions. The unipolar version features a single-ended LED output, and the multipolar version has two, for a total of 24 channels. Both versions provide reliable signal isolation, with a rise-fall time typically in the range of 0.3-1.4μs.

The H11F33SD optoisolator is found in a variety of electronic equipment—especially digital and sensing applications—where reliable signal isolation between controllers and actuators is critical. It can be used in industrial applications such as programmable logic controllers, laser machining, and aircraft systems, as well as medical systems like oxygen ratings and ECG monitoring on catheters.

The H11F33SD optoisolator has a wide range of applications due to its high isolation voltage ratings, fast rise-fall times, and compatibility with both unipolar and multipolar versions. Its PET output and PV detection circuit enable it to act as a signal isolation device, which makes it an ideal solution for applications where high voltages, low currents, and high signal-to-noise ratios are required. The H11F33SD optoisolator is the perfect choice for many applications, from industrial to medical.

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