SMD260F-2 Circuit Protection

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PTC Resettable Fuses are specifically designed to provide protection against over-current conditions. They are considered a more reliable form of protection than conventional fuses, since they offer reliable resetting capability even after multiple over-current conditions. The SMD260F-2 is a PTC Resettable Fuse used in many different applications.

The SMD260F-2 is a 1.2 amp time delay fuse. It has a maximum operating temperature of 125°C, and is rated for 125VAC. The reset temperature range is from 75°C to 95°C, and the fuse has a peak pulse current of 4 amps. The SMD260F-2 is an axial leaded device and is packaged in an 8-lead TO-220AB package, with a height of 6.85mm. The overall size of the fuse is 40mm Square, and it has a maximum profile height of 8mm.

The SMD260F-2 has two main applications: motor control and electronic lighting control. In the motor control application, the SMD260F-2 is used to protect motors from excessive over-current conditions. The fuse will trip at the 1.2 amps, and reset itself when the current drops below the reset temperature. In the electronic lighting control application, the fuse is used to control and manage the power output to electronic lights. This helps maintain a safe operating range for the lights, and protects them from over-current conditions that could cause damage.

The working principle of the SMD260F-2 is based on the combination of a PTC element (positive temperature coefficient) and a ferrite bead. When the current through the fuse exceeds the rated value (1.2 amps), the ferrite bead heats up and the PTC element heats up, tripping the fuse at the preset level. The PTC element has a positive temperature coefficient, meaning that it will only reset once the current has been lowered and the temperature has dropped back below the reset temperature range.

In summary, the SMD260F-2 is a PTC Resettable Fuse used in motor control and electronic lighting control applications. It has a maximum operating temperature of 125°C, and trips at 1.2 amps and resets once the temperature has dropped back below the reset temperature range. The combination of a PTC element and ferrite bead form the working principle of the SMD260F-2.

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