MF-SMHT136-2 Circuit Protection

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PTC resettable fuses, such as the MF-SMHT136-2, are an important component of many electrical machines and systems. The thermal-magnetohydrodynamic (TMH) design of the MF-SMHT136-2 is the latest development in resettable fuse technology, offering enhanced performance features such as reliable overcurrent protection and low on-state resistance compared with traditional fuses. In this article, we will discuss the various applications of the MF-SMHT136-2, as well as its working principle.

Applications of the MF-SMHT136-2

The MF-SMHT136-2 is most commonly used in automotive, industrial, and consumer applications. In automotive applications, it is often used to protect car batteries and circuit boards from short circuits and other potential electrical faults. In industrial applications, it is typically used to protect motors, power supplies, and other electrical components from overvoltage and overcurrent. In consumer products, such as computers and other electronic devices, it can be used to protect circuits from overvoltage and overcurrent, as well as to provide surge protection.

The MF-SMHT136-2 can also be used in ultra-portable devices, such as cell phones and wearables, to protect circuitry from overheating due to high temperatures or overcurrent. This makes it ideal for applications where space is a premium and a high-performance resettable fuse is needed to protect delicate electronics. Additionally, it can be used in medical devices, such as imaging equipment, to provide short-circuit protection and long-term safety.

Working Principle of the MF-SMHT136-2

The MF-SMHT136-2 operates using a thermal magnetohydrodynamic (TMH) design. This type of resettable fuse works by detecting an overcurrent event and then triggering a small current through a heating element, which then heats up the fuse element to a pre-determined temperature. Once this temperature is reached, the fuse element is rapidly cooled by a magnetohydrodynamic (MHD) chamber. During the cooling process, a spring-loaded pin is reset to the open position, which then re-establishes circuit protection and allows the device to be reconnected.

The TMH design of the MF-SMHT136-2 also features a low on-state resistance which helps to reduce circuit power dissipation and improve device reliability. Additionally, it has an increased temperature rise due to the thermal-magnetohydrodynamic design, which enables it to protect circuits more effectively in extreme temperatures and harsh environments. This helps to increase the safety of the circuit, as well as the lifespan of the device.

Conclusion

The MF-SMHT136-2 is an advanced resettable fuse that is ideal for applications that require reliable overcurrent protection and low on-state resistance. It is commonly used in automotive, industrial, and consumer electronics applications, as well as in ultra-portable devices, such as cell phones and wearables, to protect circuits from overheating. Additionally, its thermal-magnetohydrodynamic (TMH) design enables it to reset the spring-loaded pin to the open position quickly and reliably after an overcurrent event.

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