OPB881N51

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Optical Sensors, also known as photodetectors, detect changes in light intensity and convert this information into a corresponding electrical signal. Photointerrupters are one type of optical sensors, which use light interruption to monitor the presence or absence of an object in a certain area. Slot Type Photointerrupters act as optoelectronic switches, typically used for counting or position sensing applications. Transistor output types, such as the OPB881N51, are specifically designed for automated systems.The OPB881N51 joins Sharp Corporation’s lineup of Slot Type Photointerrupters with its Transistor output. It is constructed using a GaAlAs infrared LED and an integrated phototransistor as one unit that is installed between a light-resistant material and a slot opening.Benefiting from its Transistor output mode, the OPB881N51 is suitable for applications including counter counting, circuits of card readers, PCB inspection, assembly lines, and home appliance control. Furthermore, it has a wide range of standard operating voltages, providing greater versatility and compatibility for various automated system requirements.To start off, some of its key technical features include an operating voltage range of 4.5V to 18V, an output current of 20mA max, a collector-emitter (VCE) sat voltage from 0.35V typ to 0.5V max, an operating temperature range of -30°C to 75 °C, and a storage temperature range of -40°C to 85°C.Different from conventional Slot Type Photointerrupters, the OPB881N51 boasts a higher speed response, which detects the light interruption more rapidly. It also features reverse-polarity protection and fast start-up times with high noise immunity features, ensuring more reliable operation in highly automated systems. On the other hand, its 1.3mm x 0.5mm dimension in the chip form allows easy embedding into automated systems or control boards.To sum up, the OPB881N51 Transistor Output Slot Type Photointerrupter is useful for applications for counter counting, cards readers, PCB inspection, assembly lines, and home appliance control. With its wide operating voltage range and high speed response features, its reliable operation is ensured under any conditions. It is also designed with small physical dimensions in the chip form for versatile mounting options. As a result, the OPB881N51 is an ideal choice for automated systems with its small size, easy-to-use form, and high performance.

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