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Resettable Fuses - PPTC
Resettable Fuses are in stock with same-day shipping at Mouser from industry leading manufacturers. Mouser is an authorized distributor for many resettable fuse manufacturers including Bel, Bourns, Littelfuse & more.
Resettable fuses are circuit protection devices designed to automatically limit excessive current flow and recover their normal operating state once the fault condition is removed. Unlike traditional one-time fuses, they can repeatedly respond to overcurrent events without requiring replacement, helping reduce maintenance requirements and improve system uptime. These components provide an effective solution for protecting electronic circuits, power systems, and connected devices from damage caused by overloads and short circuits.
Types: The most common resettable fuse types include polymer positive temperature coefficient (PPTC) resettable fuses, radial leaded resettable fuses, surface-mount resettable fuses, high-current resettable fuses, telecommunications resettable fuses, automotive-grade resettable fuses, and battery protection resettable fuses, each designed for specific current limiting and circuit protection requirements.
Applications: Resettable fuses are widely used in power supplies, battery packs, industrial automation systems, consumer electronics, telecommunications equipment, automotive electronics, USB-powered devices, and embedded systems to protect circuits from overcurrent and fault conditions.
Selection requirements: To choose resettable fuses, evaluate hold current, trip current, maximum voltage rating, response time, resistance characteristics, operating temperature range, package type, fault recovery behavior, and suitability for the intended electrical and environmental conditions.
