The JK30 Plug-In Self-Resettable Fuse provides dependable overcurrent protection for low‑voltage circuits with automatic recovery. It protects wiring and components without the need for fuse replacement after a fault, helping keep systems up and running. Key benefits - Wide current options: available in ratings from 0.9A to 10A (the 4A version described here), so you can tailor protection to your circuit. - 30V rating: suitable for low‑voltage DC applications up to 30V. - Self-resetting protection: once the fault is removed, the fuse automatically returns to normal operation. - Plug‑in design: quick, easy insertion into compatible holders or sockets for fast deployment. - Size note: the dimensions described here correspond to the 4A version, with smaller or larger variants available in the same family. - Reliable construction: compact, durable, and designed for space‑constrained layouts in automotive, electronics, and lighting projects. What it protects - Electrical circuits from overcurrent and short circuit events. - Wiring insulation and sensitive components in low‑voltage systems. Use scenarios - In a 12V LED lighting installation to prevent wiring damage from short circuits. - In a small automotive accessory circuit to automatically restore service after a fault clears. - In a 5–24V electronics project or prototype to guard power rails against overcurrent without replacing fuses.