CMF55845R00BEEB

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Through Hole Resistors are mainly used to prevent the current flow from exceeding its certain level. They serve as a safety device to protect the circuit from damage due to overcurrents and, when used correctly, can increase the stability and reliability of a circuit. CMF55845R00BEEB is a through-hole resistor from Murata Electronics, belonging to Murata\'s Multi-Function Series of resistors.

The main application field of CMF55845R00BEEB is current-limiting and inrush-limiting. It is widely used in SMPS design, such as DC-DC converters, AC-DC adaptors, DC-AC inverters, and AC-AC regulators. In addition to current-limiting and inrush-limiting applications, they also provide protection from overvoltage and overcurrent transients in automotive and industrial ECUs.

CMF55845R00BEEB is constructed with a ceramic body and features an optimum combination of metal alloy and organic materials. Its open construction enables the resistor to be visible to the naked eye ensuring easy inline inspection. It has excellent resistance against humidity, thermal shock, oxidation, and temperature cycling.

The working principle of CMF55845R00BEEB is based on a negative temperature coefficient (NTC) thermistor. It is designed to have a higher resistance at chilled condition and a lower resistance at rising temperature. This property ensures higher insulation performance and low current at low temperatures and higher current at high temperatures. When an overcurrent or inrush-current is exceeded, the resistance is reduced and the instantaneous current flow is limited.

CMF55845R00BEEB has a very low dynamic resistance which enables it to respond quickly to any inrush. It also operates in temperatures from -55°C to 150°C, and has a high rated voltage up to 600V. The total capacitance range is between 10pF to 1000pF, making them suitable for high speed switching applications. Furthermore, it is RoHS compliant and UL recognized.

Overall, CMF55845R00BEEB is a high precision multi-function series resistor from Murata Electronics, suitable for current-limiting and inrush-limiting applications. It features a ceramic construction with excellent resistance against thermal shock and oxidation, and is RoHS compliant. It has a low dynamic resistance for fast response to inrush currents, and a high operating temperature range. The combination of its features makes it a great choice for microwave, medium, and high voltage applications.

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