JK30 Plug-in Self-Resetting PPTC Fuses — 100 pcs Key benefits Automatic overcurrent protection that resets itself after a fault, reducing downtime and eliminating single-use fuse replacements. Multiple hold-current options let you match protection to your load, reducing nuisance trips while maintaining safety. Plug-in design for fast replacement and simple integration without special fuse holders or soldering. PPTC polymer construction delivers repeatable protection with low voltage drop and stable performance over repeated trips. Pack of 100 supports multiple assemblies, spares, or production runs. Key specifications Model: JK30 plug-in PPTC fuse Quantity: 100 pieces Voltage rating: up to 30V DC Hold-current options: 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 Type: self-resetting, plug-in Material: PPTC (polymeric positive temperature coefficient) How this product solves common problems Prevents permanent damage from short circuits and overloads while avoiding the need to source and replace one-time fuses. Offers flexible current selection so you can choose protection that matches normal operating current and tolerates expected inrush or startup currents. Reduces repair time with plug-in cartridges that can be swapped quickly by technicians or end users. Compatibility and typical uses Designed for low-voltage DC circuits up to 30V: USB chargers, power banks, small DC power supplies, battery-powered devices, LED drivers, and hobby electronics. Common applications include USB-C chargers and power banks, LED driver protection and wall-wart adapters, and resettable protection in 12V hobby systems such as 3D printers, robotics, and RC equipment. Practical use scenarios Protect a USB-C charger or portable power bank from short-circuit events while allowing the device to recover automatically when the fault clears. Guard LED driver circuits or wall-wart adapters against overloads without replacing fuses after each event. Add fast, resettable protection to 12V hobby electronics (3D printers, robotics controllers, RC systems) to minimize downtime during testing and development. Installation and selection tips Choose a hold current slightly above your normal operating current to avoid unnecessary trips. Account for startup or inrush currents (motors, capacitive loads) when sizing protection. Confirm the application stays within the 30V DC rating. Use the plug-in form factor for easy maintenance and quick swaps during assembly or servicing. What you get 100 JK30 plug-in PPTC fuses, self-resetting, multiple hold-current options as listed above, suitable for low-voltage DC protection up to 30V. No additional tools or specialized holders are required for installation; replaceable plug-in fuses let you restore protection quickly after a fault.