RKEF090

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PTC Resettable Fuses is a type of non-overload current protection designed specifically for applications, such as chargers, transformers and motors. This is the same type of protection that has traditionally been used in power strips, desktop computers and laptops. The PTC Resettable Fuses are easy to use and install, and can be used for any application where protection against over-temperature, over-current and over-voltage is required.The RKEF090 is a advanced PTC Resettable Fuses and its application fields include electric reduction motors, transformers, chargers and automotive power supply systems. It can protect the products from overload current, short circuit and thermal runaway.The RKEF090 is composed of two parts, a Mov(metal oxide varistor) and a fuse element. Usually when the equipments under normal working condition, the current running through the breaker will kept staying in a relatively small status, and when the current rises to a certain anount, usually it’s about 2.2 times the normal running current, the breaker temperature will rise and make the fuse element fuse and cut the circuit.The working principle of RKEF090 is based on the reset time-delay mechanism. The RKEF090 starts work when the power switch turns on. It can limit the current when the rated current is exceeded during current surge. When the current overload situation takes place, the PTC Resettable Fuses will expand its volume automatically due to the heat generated by the electric current. This will force the plug element to break down the connection between the circuit board and end terminal, forcing the current to stay in a safe zone.At the same time, the PTC Resettable Fuses will also restrict the temperature from getting too high by limiting the current in case of overloads. When the temperature and current drop back to a safe level, the reset mechanism will begin its process, the PTC Resettable Fuses will shrink back to its normal size and reset becompleted.With the RKEF090, the user can feel a real peace of mind knowing their electronic devices are secure and protected from power overloads. This Resettable Fuses offers excellent protection against over-current, over-voltage, and over-temperature and can be used in numerous applications.

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