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PTC Resettable Fuses

PTC (Positive Temperature Coefficient) resettable fuses are an increasingly common form of electrical protection, used for a variety of applications. The B59970C0080A051 is a fully encapsulated, non-inductive, resettable PTC fuse. It is designed to quickly and automatically shut off power in the event of an overload, thus preventing potentially costly and dangerous damage to electrical equipment.

Application Field

The B59970C0080A051 is most often used in high-current, low-Voltage applications such as battery packs, power converters, and other equipment that requires advanced protection. It is also suitable for high-current, low-voltage (up to 30V) automotive applications. Because it is a resettable fuse, the B59970C0080A051 offers the advantage of being able to be restored to its normal state, without needing to be replaced, thus giving its user greater control over power times, currents, and voltages.

Working Principle

When an overload situation occurs, a PTC resettable fuse works by detecting a sudden rise in current, which rapidly increases the temperature of the fuse element and causes it to expand. This expansion causes the electrical contacts to open, cutting off the flow of electrical current and preventing damage to device or equipment. To reset the fuse, the user simply needs to reduce the current or voltage, allowing the element to cool down and return to its original state.

The B59970C0080A051 is a particularly versatile PTC resettable fuse. It has a maximum voltage of 30 V and can handle currents ranging from 0.01 to 11 A, making it well-suited to a wide range of applications. It also features a compact design, low profile, and predictable overload response, all of which make it an ideal choice for space-saving and cost-effective protection.

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