MF-R700-2-99

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PTC Resettable Fuses have become increasingly popular in industrial applications the past few decades. The MF-R700-2-99 is one of the latest products in this category of resettable fuses that has many applications in industrial settings. This article will tackle the applications and working principles of the MF-R700-2-99.

The MF-R700-2-99 is a PTC Resettable Fuse (also known as Polyfuse) made from Polydiimethylsiloxane or PDMS resin. It is a two-element construction with a resistor and a metal stud. The resistor acts as the heating element while the metal stud works as a temperature monitor. The stud has a temperature range of -50 to 125°C.

The MF-R700-2-99 is suitable for industrial short-circuit protection in a variety of applications from 5 Amps to 100 Amps. The fuse is known for its ability to rapidly detect and trip in the event of a short circuit, making it particularly useful in instrumentation and motor control applications. Furthermore, it features low harmonic distortion and a cycle response time of less than 10ms, making it highly reliable and allowing it to be a part of complex circuits.

The working principle of the MF-R700-2-99 is fairly simple. Due to the presence of the resistor, the fusing characteristics are determined by the resistance value as well as the ambient temperature. When a short circuit occurs, the resistor’s thermal build-up will exceed the glass transition temperature of the PDMS, thus causing the fuse element to soften and disconnect the circuit. This brief period of time is called the “trip time”. Once the short-circuit is removed, the thermal energy dissipates and the fuse resumes its normal state.

The MF-R700-2-99 is recommended for over-current protection in power supplies, UPS, servo drives, and SMPS circuits. It can also be used in desktop, laptop, and tablet computers to provide protection against short circuits and to help maintain the safety of the user. Additionally, it is often employed in communications equipment, power conversion systems, and power adapters for consumer electronics like smartphones and televisions.

Applications of PTC Resettable Fuses like the MF-R700-2-99 are widespread due to their reliability, cycle response time, and quick detection of faults. The working principles behind these fuses are straightforward, making them ideal for properties with known current limits. All in all, the MF-R700-2-99 is an excellent choice for short-circuit protection in a variety of industrial applications.

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