MF-S150

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PTC Resettable Fuses are an essential type of protection circuit in many electrical and electronic systems. The MF-S150 utilizes a Pt resistor, also known as a Positive Temperature Coefficient Resistor (PTCR) as its switching element. It functions as a self-resetting overload protection device.

The circuit electromechanically operates by responding to the rising temperature of the adjacent components. It also consists of two terminals, with one side used as the input and the other side as the output. When the input voltage is greater than the output voltage, the Pt element in the fuse reacts to the heat of the nearby components and decreases its resistance. This results in the fuse tripping and hence when this happens the electrical circuit cuts off the power.

The MF-S150 fuse is designed to be used in conjunction with other current protection devices such as fuses or circuit breakers. This type of fuse is especially suitable in applications where over-current protection cannot be provided by traditional over-current protection devices. Its biggest advantage is that it can be used in harsh environments as the Pt resistor element is heat-resistant up to 150°C.

The MF-S150 can be used in various applications, including power supplies, data processing equipment, computers, and communication systems, among others. It is commonly used on cables such as Ethernet, USB and HDMI, where current control is required. In these applications, the fuse offers safety against over voltage, short circuits, and over-current protection.

In order to understand the working principle of the MF-S150, it is essential to first look at the basic components of the system. Firstly, the Pt resistor element is the main part responsible for the tripping of the fuse. It is a special resistor that increases its resistance with increasing temperature. This element ensures that the fuse trips at a pre-determined temperature, which is usually around 150°C.

The other components of the MFS150 include a casing, spring contacts, an externally-set calibration switch and a reset manually switch. The casing holds the spring contacts firmly, and the contacts transfer heat from the resistor element to the casing. The externally-set calibration switch adjusts the tripping temperature of the fuse while the manually adjustable reset switch allows the user to reset the fuse and thus reset the tripping temperature.

In conclusion, the MF-S150 is a PTC Resettable Fuse that provides efficient and reliable current protection to various applications across a range of industries. Its thermal design ensures that it trips at the pre-set temperature, which in turn reduces the risk of over-current or over-voltage damage to the protected system. The fuse is specifically designed for applications where traditional over-current protection devices are unsuitable, and thus it is suitable for devices such as data processing equipment, computers, and communication systems.

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