MF-USML190-2

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PTC Resettable Fuses are self-resetting overcurrent protection devices that provide circuit protection in low voltage electronic systems. They are designed to reveal current overloads that might otherwise damage sensitive equipment, and provide reliable short-circuit protection. The MF-USML190-2 is a thermal protection element designed for a wide range of applications, and it is available in both SMD and through-hole versions.

The MF-USML190-2 features a special Ni/Ni-Mn/Ag resistor element where the current-limiting property arises from the switching characteristics of Ni-Mn-Ag material under thermal stress. It is manufactured by soldering the Ni/Ni-Mn/Ag element to a case and is sealed with a UL approved epoxy so that the product is protected from dust, oil, and other contaminants. The contact terminals provide a secure connection to the power supply and/or downstream components.

The MF-USML190-2 provides an effective solution for many different applications. It can for example be used to protect the sensor circuits in home appliances such as washing machines, refrigerators, and air conditioners. It is also effective in other applications, particularly in digital and analog circuits where resetable overcurrent protection is desired.

The working principle of the MF-USML190-2 is based on the thermal effects of current flowing through the Ni/Ni-Mn/Ag element. When a preset current level is exceeded, the element heats up quickly and its resistance increases. This increases the voltage drop and reduces the current flow through the protected circuit, thus providing reliable protection against both over- and short-circuits.

When the excessive current stops flowing, the element will cool down and its resistance will decrease again. This means that the protected circuit will be back to normal operation state, and that no component replacement is necessary in case of an overcurrent situation. This feature provides significant time and cost savings compared to traditional fuse solutions.

In addition, the MF-USML190-2 has a low profile design and is available in a range of sizes. This makes it ideal for use in space-restricted environments such as mobile phones, computers, power tools, and other consumer electronic devices. It also has a long service life as it can endure more than 100,000 openings and closings.

The MF-USML190-2 provides reliable overcurrent protection, a compact size, and a long service life, making it a great choice for a variety of applications. It can provide excellent protection in both analog and digital circuits, and it can be used in a range of home appliances and mobile devices. It offers a very cost-effective solution for overcurrent protection compared to traditional fuse solutions.

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