MF72-033D7

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Inrush Current Limiters (ICL), or often referred to as inrush limiting devices, are an important component for equipment that requires an inrush resistor or inrush limiting resistors. ICLs help ensure proper power system performance by preventing dangerous voltage transients and short circuit current events. ICLs can protect delicate electronics as well as prevent damage to expensive electrical equipment and provide power system protection.

The MF72-033D7 Inrush Current Limiter is an example of an ICL designed to protect various electrical equipment from current surges when high power devices turn on. A single MF72-033D7, used in an ICL application, offers protection from high current and voltage transient events, such as load switching, input filter tweaks, motor starting and short circuits. The MF72-033D7 features a PTC thermistor which can limit the inrush current within a few milliseconds of activation.

The MF72-033D7 is applicable for use in a variety of applications, from home electronics to large industrial drives. It can be used in residential HVAC systems, residential data centers, gasoline/electric hybrid vehicles, office equipment, medical devices, solar energy systems, industrial drives and controllers as well as power supplies. The MF72-033D7 is a highly adaptable product, meaning it can be deployed in both established applications where limited space is available and customized applications where larger power capabilities are required.

The working principle of the MF72-033D7 relies on the characteristics of a PTC thermistor. When a high current passes through a PTC thermistor, it causes a self-heating effect, which increases its resistance and in turn, decreases the current that flows through it. This thermal effect is what helps protect equipment connected in the downstream of the circuit. The MF72-033D7 features a resistance value of 6 ohms at 25°C and a temperature coefficient of resistance of 0.4%/°C. The device can operate at a range of -55°C to 130°C and has a residual resistance of 0.8 ohms at 130°C and 1 ohm at 150°C. The MF72-033D7 is rated with a maximum working voltage of 250V, a maximum rated current of 50A, and a peak current of 70A.

The MF72-033D7 also features DIN 42671/IEC 60950 certification, so users can be assured of compliance with applicable safety standards. In addition, the device is constructed using Halogen free PBT plastic, which is not only a safer material than traditional PBT plastic, but is also more resistant to wear and tear. It is also RoHS compliant, making it a safe and reliable choice for industrial applications.

The MF72-033D7 Inrush Current Limiter is an effective and reliable component for controlling and limiting high inrush currents. The device\'s self-heating PTC thermistor provides fast response time and its halogen-free PBT plastic ensures durability in harsh environments. It is also highly efficient with its low resistance values and certification compliance. With its wide range of applications, the MF72-033D7 can help protect electrical equipment from dangerous current surges.

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