1812L260ZR

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PTC Resettable Fuses are widely used in electronic products and motors due to their high thermal stability and low cost. The 1812L260ZR is one of the latest products in this category. It is a radial leaded, over-current protection device with a Leakage current rating of 10A. It is a Surface Mount Device (SMD) that is designed to protect circuits from short circuit events.

Functionality

The 1812L260ZR acts like a standard fuse, in that it provides over-current protection, but unlike a standard fuse, it can be easily reset. This is accomplished through the use of a polymeric Positive Temperature Coefficient (PTC) element as the active element. The PTC is a material that has a positive temperature coefficient, meaning that its resistance increases with increasing temperatures. When the current exceeding the rated value passes through the PTC, the temperature of the PTC increases and its resistance value increases, resulting in a decrease in current flow. This over-current protection helps protect the circuit from over-current events.

Application Field

The 1812L260ZR is frequently used in electrical and electronic applications, such as consumer electronics, computer equipment, communications equipment, medical equipment, automotive applications, and household appliances. It is also commonly used in transient protection circuits, and is particularly suitable for high inrush current applications. The device can be used in a wide temperature range from -55°C to +125°C.

Working Principle

The 1812L260ZR is an over-current protection device that utilizes a PTC element to trip itself when the current exceeds the rated value. The PTC element consists of a series of metal particles embedded in a ceramic material, and is surrounded by an insulator. When the current passes through the PTC, the heat generated by the electric current causes the PTC element to expand and reduce its electrical resistance. This results in a decrease in current flow and the device trips, cutting off the current to the circuit. To reset the device, the current must be reduced to allow the PTC element to cool and contract, thus restoring its electrical resistance to its initial value, thereby resetting the device.

The 1812L260ZR is a cost- effective, reliable device which can be used in a variety of applications. Its low cost and ease of resetting make it an ideal over-current protection device for many applications.

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