250R180MR

PTC resettable fuses are an effective solution to repeatedly occurring overcurrent situations. They feature a thermal sensing element which, when subjected to an overcurrent condition, causes the device to enter the tripped state. In this state, the device\'s current rating drops substantially, allowing the current through the device to reduce and the overcurrent fault condition to clear. The device will remain in the tripped state until the overcurrent fault is cleared and the device is allowed to cool. Once the device cools, the device will reset, allowing the current to flow normally again.

The two most common types of PTC resettable fuses are 250R and 180MR. The 250R is designed for low voltage applications and is typically used in consumer electronics, power supplies, and motor control applications. The 180MR is designed for higher voltage applications and is typically used in automotive, telecom, and HVAC applications.

The 250R features a design which can act as an over-current protection device for low voltage AC/DC applications. The 250R is designed with two thermal sensing elements which are in close physical contact. The current rating of the 250R is typically set via the use of resistors. When an over-current occurs in an AC/DC circuit, the two sensing elements react, causing the temperature of the device to rise. Once the temperature has increased to a certain point, the device will trip, thus causing the current rating to drop and reduce the over-current in the circuit.

The 180MR is designed for use in higher voltage applications. Like the 250R, it features two thermal sensing elements which are in close contact with each other. The current rating is typically set via the use of capacitors. When an over-current occurs in an AC/DC circuit, the two sensing elements react, causing the voltage of the device to increase. Once the voltage has increased to a certain point, the device will trip, thus causing the current rating to drop and reduce the over-current in the circuit.

The two types of PTC resettable fuses are designed to provide electrical protection against over-currents, which can help prevent damage to electrical systems. The 250R is ideal for low voltage applications, while the 180MR is designed for use in higher voltage applications. Both types of devices feature a design which can allow for the resetting of the device, thus allowing the device to protect the system again upon resumption of normal operating conditions.

PTC resettable fuses can provide increased protection and efficiency for AC/DC systems. They are designed to provide protection against over-currents and can be reset after an over-current fault has been cleared. The two most common types of PTC resettable fuses are the 250R and the 180MR. Each device features its own unique design and features that make them ideal for specific applications. As more applications utilize PTC resettable fuses, their popularity and effectiveness will continue to increase.