100 pcs JK30 plug-in self-resetting PPTC fuses for overcurrent protection in low-voltage electronics. Each fuse is rated up to 30V and is available in multiple hold-current values (0.9A, 1.1A, 1.35A, 1.5A, 1.6A, 1.85A, 2A, 2.5A, 3A, 4A, 5A, 6A, 7A, 8A, 9A, 10A). Size specification: 0.03A. Self-resetting, plug-in type. Key benefits - Provides overcurrent protection that automatically resets after a fault, reducing downtime and part replacement. - Wide current options let you match the hold current to your load, lowering nuisance trips. - Plug-in design enables quick replacement and easy integration without complicated fuse holders. - PPTC polymer material delivers reliable, repeatable protection with low voltage drop. - Pack of 100 pieces supports multiple assemblies or spares across projects. Compatibility and use - Suitable for circuits up to 30V DC; common choices include USB chargers, battery-powered devices, LED drivers, small power supplies, and hobby electronics. Use scenarios - Protect a USB-C charger or power bank from short-circuit events. - Guard LED driver circuits or wall-wart adapters against overloads. - Provide fast, resettable protection in 12V hobby systems such as 3D printers or robotics. Tips - Choose a hold current slightly above normal operating current and consider startup surges to minimize trips.