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The TLP7920(B.F) is a fast-acting, 500 mA, high voltage ultra-small photorelay, manufactured by Toshiba. It is a transistor output optically coupled isolator that features light detection on a narrow beam emitted by an infrared emitting diode. It is widely used in industrial and consumer electronics to sense and control power circuits, as they help in preventing undesired electrical interference and noise between circuits. The device is widely used applications such as programmable logic controllers (PLCs), AC/DC power supplies, and electrical/electronic motors/ pumps. It has a wide range of operating temperature of -40 to +125 °C, making it ideally suitable for harsh operating conditions. It also features a compact package size of 6.0 x 4.5 x 3.5 mm, making it convenient for a variety of applications.