SMD1812P150TSA

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PTC Resettable Fuses are an important category of fuses used in many industrial and automotive applications. PTCs offer a number of benefits over traditional fuses including greater safety, reliability, and cost savings. The SMD1812P150TSA is a popular PTC Resettable Fuse used in a variety of applications.

The SMD1812P150TSA is a surface mount device with an operating temperature range of -40°C to +85°C. It has a maximum voltage rating of 16V DC, a maximum current rating of 150A, and a hold current rating of 70A. The fuse is designed to open (trip) when the current passing through it exceeds the programmed hold current. When the current drops below the hold current, the fuse closes (resets) and can continue to be used.

The SMD1812P150TSA is widely used in automotive applications, such as in car audio systems and vehicle charging systems. It is also used in industrial applications such as automation systems and UPS systems. In all of these applications, the SMD1812P150TSA provides critical protection against over-current and overload conditions.

The working principle of the SMD1812P150TSA relies on a PTC (positive temperature coefficient) element. This element is made from a special conductive polymer that has a positive temperature coefficient, meaning that its resistance increases with temperature. The PTC element is connected in series with the current path. When the device is working normally, the current passes through the PTC element and its resistance is low, allowing the current to flow freely. However, when the current exceeds the rated maximum, the temperature of the PTC element begins to rise, which increases its resistance. This causes the current to drop, and the device to trip, thus protecting the circuit.

Once the current has been reduced to below the hold current rating, the temperature of the PTC element will drop and its resistance will return to its low level, resetting the device and allowing it to be reused. The SMD1812P150TSA thus provides efficient and reliable protection for automotive and industrial applications.

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