PTS18126V125

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PTC Resettable fuses are a specialized type of fuse that are designed to be self-resetting and able to reset after a current overload condition. The PTC Resettable fuse, or polyfuse, is a type of heat sensitive polymer that is designed to act as an electrical safety device by preventing damage from over-current or over-voltage conditions. The most common application of the PTC Resettable fuse is in the form of an over-current protector. This fuse has become increasingly important in safety and is now seen as a critical component in many electronic devices.

The PTC Resettable fuse model PTS18126V125 is an over-current protector with a rated interrupting current of 7.5A. It is a single-pole, normally-on (NON) safety device. It is a two-part device made up of a PTC thermistor element inserted into a clamp-style holder which protects the PTC element from thermal overload and also provides a method to secure the element into the circuit. It is suitable for use in applications that require an interruption of excess current.

The working principle of the PTC Resettable fuse lies in the thermistor element. The element is a semiconductor that reacts to an increase in temperature by suddenly reducing its electrical resistance. When an overload occurs, the current flowing through the thermistor element heats it up and causes it to switch from a low resistance to a very high resistance. This reduces the current drawn and thus prevents any further damage to the device.

Once the overload is removed, the PTC Resettable fuse can reset itself. This reset process is triggered by a decrease in temperature. As the temperature decreases, the resistor begins to behave normally again, and the fuse can re-establish its protective role. It is this self-resetting action that makes the PTC Resettable fuse so important for safety.

The PTC Resettable fuse is an important component of many electrical products. It is used in consumer and professional electrical devices such as power supplies and motor controllers. It is also found in fire and smoke alarms, IT equipment, brake systems, and solar panel systems. Its ability to quickly reset itself makes it a valuable asset when dealing with power surges and over-current events.

In conclusion, the PTC Resettable fuse model PTS18126V125 is a single-pole, normally-on (NON) safety device designed to protect electrical systems from over-current and over-voltage conditions. It works by using a heat-sensitive thermistor element that reacts to an increase in temperature by switching from a low resistance to a very high resistance, thus limiting the current drawn and protecting the circuit. Once the overload is removed, the PTC Resettable fuse will reset itself and begin to function normally again. This type of fuse is typically found in consumer and industrial electrical products such as power supplies, fire and smoke alarms, IT equipment, brake systems, and solar panel systems.

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