SFH 3015 FA-2/3

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Phototransistors are versatile optical sensors widely used in a variety of applications. They are capable of detecting discrepancies between varying light levels and responding accordingly. The SFH 3015 FA-2/3 is a light sensor based on a phototransistor and designed to detect the presence or intensity of visible light in an area. It is capable of detecting level differences as small as 0.2% and has a low activation threshold of 7 mV.

The SFH 3015 FA-2/3 is constructed from an NPN phototransistor housed in a leadless miniflat package. The package consists of a metal enclosure that houses the transistor and two platinum contacts located at the bottom, providing power and ground connections. An internal circuit boards is also given, that consists of two resistors and one capacitor for loading, a reverse biased diode for suppressing voltage transients and a bias voltage regulator. The whole setup is very compact and requires no additional mounting hardware.

The working principle of the SFH 3015 FA-2/3 is based on the fact that when an LED is illuminated by photons of light, a current will be generated in the phototransistor due to the photoelectric effect. This current will be amplified by the built-in transistor and sent to the output pin as a voltage signal, which can then be used as a control signal in electronics circuits. The transistor used in the SFH 3015 FA-2/3 has a high gain and low current quiescent state, allowing it to process low light levels efficiently and accurately.

The SFH 3015 FA-2/3 can be used in a variety of applications such as light sensing in an automated system, object detection in robotics, or motion detection in security systems. It can be used as a stand-alone device or combined with a control circuit to form a complete system. With its narrow activation thresholds and small incremental changes, it is ideal for sensitive applications such as in medical equipment, visual prosthetics, and robotic perception systems.

In summary, the SFH 3015 FA-2/3 is an NPN phototransistor used as an optical sensor in a range of applications. It consists of a miniflat package containing a circuit board with two resistors and one capacitor, a reverse biased diode for voltage suppression, and a bias voltage regulator. The working principle is based on the fact that an LED will generate a current in the transistor when illuminated by photons of light. This current will be amplified and sent to the output pin as a voltage signal, which can then be used as a control signal in electronics circuits. The SFH 3015 FA-2/3 is ideal for sensitive applications due to its narrow activation thresholds and small incremental changes.

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