MINISMDE190F-2

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PTC Resettable Fuses are used widely to protect motors, appliances, electronic circuits and other applications against damage from overloading, overcurrent, short circuits and thermal runaway. The MINISMDE190F-2 is a resettable fuse designed for providing reliable, repeatable protection for DC circuits whilst also protecting against thermal overload.

The MINISMDE190F-2 is designed specifically to act as a thermal and electrical overload protection device. This fuse has a trip threshold that can vary according to conditions. It is a two leg device containing two high temperature components: a PTC element and a bimetal system. The fuse acts as a circuit breaker which can provide reliable protection in areas that are too difficult to access with traditional fuses such as motor starting.

The application of MINISMDE190F-2 fuses can reduce the cost of intermittent over-current or short circuit protection. The PTC element responds to heat, such that an increase in temperature caused by an overload or short circuit will cause the PTC element to rapidly trip and interrupt the current. This results in a reliable circuit breaker that can provide fast, repeatable protection against thermal overloads.

The working principle of the MINISMDE190F-2 is based on a self-heating bolometer. When the bolometer is heated, a metal element inside it expands, which in turn causes a reduction in the electrical resistance of the bolometer and an increase in the current through the PTC element. When the maximum current is reached, the PTC element will rapidly react by tripping and interrupting the circuit.

The MINISMDE190F-2 is designed to be placed in-line with the electrical circuit it is designed to protect. In the event of an over-current or over-load, the PTC element will activate and break the circuit. Once the current has been interrupted, the elements will cool down and reset, allowing the circuit to be re-energized. This helps to ensure a reliable protection against thermal overloading.

The MINISMDE190F-2 is an ideal choice for applications such as DC power supplies, motor controls, and other applications that require reliable and repeatable protection against both thermal overloading and electrical overloading. It has advantages over traditional fuses as it has the ability to rapidly respond to thermal overloads while protecting against electrical overloading. Furthermore, the MINISMDE190F-2 can be reset and reused providing a cost effective protection solution.

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