B59221R0250B010

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PTC resettable fuses are a type of over-current protection device, providing protection against short circuit and overload events. The basic concept behind a PTC resettable fuse is simple: it’s a temperature-sensitive device that opens when an electrical overload occurs, and then resets itself as the overloaded condition is removed. This type of protection is becoming increasingly popular, as it eliminates the need for traditional fuses and provides a longer-term form of protection for electrical components and devices.

The B59221R0250B010 is a member of the B59221 family of resettable fuse products from Eaton. These devices feature a current rating of 250A, a static resistance of 0.22 ohms, and a typical trip time of 0.3 seconds. In addition to the resettable fuses, Eaton also offers a wide range of other related products, such as surge arresters, fusible links, and protection relays.

The B59221R0250B010 is designed to provide over-current protection for a variety of applications. It is commonly used in power supplies, motor control circuits, and other AC/DC systems. In particular, it is ideal for applications that require frequent current interruptions, as it is able to reset itself after each trip. It is also suitable for inrush current protection or current leakage protection.

The working principle of the B59221R0250B010 is based on a thermal element. When the current passing through the device exceeds its rated current, a heat-generating element inside the device is activated. This element then heats the internal components, causing them to expand and thus opening the circuit. As the temperature inside the fuse drops and the components cool down, the circuit is then automatically reset. Therefore, when the fuse trips, no external intervention is required to reset it.

The B59221R0250B010 is a highly reliable and cost-effective device for over-current protection. It eliminates the need for replacing fuses and provides a long-term protection solution. The thermal element allows the fuse to reset itself after a temporary overload or surge event, reducing the likelihood of damage to vulnerable circuits or components. Additionally, the device offers multiple benefits including a quick trip time, low resistance, and a wide operating temperature range.

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