MF-RX012/250-2-2

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PTC Resettable Fuses are an important tool for keeping electrical systems safe and secure. The MF-RX012/250-2-2 is one of many such fuses designed to offer optimal safety and efficiency. This article aims to explain the application field and working principle of the MF-RX012/250-2-2.

What are PTC Resettable Fuses?

PTC Resettable Fuses (also known as polyfuses) are devices used to protect electrical circuits from overcurrents. They work by detecting when the current exceeds the threshold and then quickly activating a switch to shut off the current. This preserves the circuit from damage and prevents the fire hazard associated with uncontrolled electric arcs. Unlike traditional fuses, PTC Resettable Fuses can be reset after they have been triggered, allowing for their reuse.

MF-RX012/250-2-2 Overview

The MF-RX012/250-2-2 is a particular example of a PTC Resettable Fuse. It is designed to be used in automotive, home appliances, and other electronic applications. It has a current rating of 250 A and a voltage rating of 12 V. The fuse also has an off-state resistance of 10 mΩ and an on-state resistance of 140 mΩ. This means that when the fuse is in its normal, off-state, it will remain relatively low resistance, but when it has been triggered, it will switch to a higher resistance to prevent further current flow.

Application Fields & Working Principles

The MF-RX012/250-2-2 can be used in a variety of applications. It is particularly well-suited for use in home appliances, automotive systems, and other low-power DC circuits. In these applications, the PTC Resettable Fuse will be able to detect any overcurrents and quickly shut off the power supply to prevent further damage. Once the fault has been rectified, the fuse can be reset and the circuit can go back to working normally.

The working principle of the MF-RX012/250-2-2 is quite simple. As mentioned above, the fuse has an off-state resistance of 10 mΩ and an on-state resistance of 140 mΩ. When the current is below the threshold, the fuse will remain in its low resistance, off-state. However, when the current exceeds the threshold, the fuse will switch to its high resistance, on-state. This will cause the voltage to drop, limiting the current to a safe level.

Once the fault has been rectified, the MF-RX012/250-2-2 can be reset by pressing the reset button on the device. This will cause the resistance to drop back to its low resistance, off-state, allowing the circuit to function normally once again. The reset process is quick and easy, making the PTC Resettable Fuse an ideal choice for a variety of applications.

Conclusion

The MF-RX012/250-2-2 is a PTC Resettable Fuse that can offer optimal safety and efficiency in a variety of applications. It has a current rating of 250 A and a voltage rating of 12 V, and its off-state resistance is 10 mΩ while its on-state resistance is 140 mΩ. This allows the fuse to detect overcurrents and quickly shut off the power supply to protect the circuit. Once the fault has been rectified, the fuse can be reset and the circuit can go back to working normally.

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