MF-RX300/72-AP

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PTC resettable fuses are only current sensing devices that act as an over-current protection device. It provides a reliable, adjustable and safe method of protecting electrical and electronic circuits against abnormally high currents. The MF-RX300/72-AP is a PTC resettable fuse that offers high current protection with multiple ports of protection.

The MF-RX300/72-AP has a tripping current of 300 amperes (A) and tripping voltage of 72 volts (V). It has an operating temperature range of -40°C to +85°C and a 5-minute hold current of 255A. It is RoHS compliant and resets with an automatic recovery. It has a high surge current rating of 11 kA and a hot recycling time of less than 1 ms. It also features over-temperature protection and short circuit protection. The port type is an M5 screw terminal.

The MF-RX300/72-AP is typically used for Information Technology Equipment (ITE), Battery Packs, Uninterruptible Power Supplies (UPS) and Automotive Applications. In ITE applications, the MF-RX300/72-AP provides a reliable over-current protection circuit for circuit boards and cable harnesses. In battery applications, the device protects battery cells from over-charging and over-current conditions.

The working principle of a PTC resettable fuse is fairly simple. The device features a fuse element which consists of a polymeric material with a current-dependent resistance. When the current flowing through the element exceeds a predefined value, the element rapidly increases its resistance, limiting current flow and thus protecting the protected load. When the over-current condition is removed, the element\'s resistance drops to normal levels, allowing the protected circuit to resume its normal operation. Thanks to its automatic resetting capabilities, the device eliminates the need for manual resetting, saving time and cost.

The MF-RX300/72-AP is a versatile and reliable protection device that can be used in a variety of applications. It provides a cost-effective and easy-to-implement solution for protecting circuits from fault conditions and provides superior protection against high currents. Additionally, its automatic resetting capabilities save time and cost, making it an ideal choice for a wide range of applications.

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