This fuse power adapter is designed specifically for non-destructive expansion of power supply for car electrical appliances. It is compatible with the 12V passenger car power supply system and can directly lead out the standard cigarette lighter power supply interface from the original medium-sized fuse box. It does not require wire breaking modification throughout the process and provides stable power supply for car Chargers, driving recorders, inflation pumps and other equipment. It is a practical safety accessory for hidden wiring and expanded power supply interfaces in cars.

The power supply end adopts a standard medium-sized plug-in fuse power supply structure, matched with a U-shaped forked grounding terminal, and adopts a dual circuit independent insurance design: one circuit fully receives the original car circuit fuse, fully retains the overload and short-circuit protection mechanism of the original car circuit, and does not change the safety logic of the original car circuit; Another way is to equip the newly added cigarette lighter circuit with independent fuse protection. When the external equipment experiences overload or short circuit faults, the fuse of the newly added circuit will be blown first, without interfering with the normal operation of the original vehicle circuit throughout the process, thus avoiding safety risks caused by circuit modification structurally. The grounding terminal adopts a standard fork type cold pressed terminal, which can be directly fixed on the vehicle grounding screw, making installation convenient and the grounding circuit stable and reliable.

The cigarette lighter mother base adopts a high-temperature resistant and flame-retardant engineering plastic integrated molding shell, and the port is equipped with a metal reinforced lining ring, which is wear-resistant and deformation resistant, and is not easy to crack or damage after long-term insertion and extraction; The internal high elasticity conductive contact piece has sufficient clamping force, and after inserting into the car electrical plug, it fits tightly and is not easy to loosen or fall off, suitable for all standard cigarette lighter male head devices. The tail of the mother seat is equipped with a multi ring anti bending wire protection structure, which can evenly disperse the stress generated by the pulling and repeated bending of the wire, effectively alleviate the fatigue loss of the wire root, reduce the problems of outer skin cracking and internal wire breakage, and significantly extend the overall service life of the product.

The wire adopts red and black dual core automotive grade flame-retardant PVC wire, with clear color distinction between positive and negative poles, and standardized wiring that is not easily reversed; The internal conductor is made of high-purity oxygen free copper core, with stable current carrying capacity and low power transmission loss. Under rated load, the temperature rise is stable under long-term power on conditions, and it is not easy to generate heat and oxidize. All wiring connections are reinforced with heat shrink tubing insulation, which has excellent sealing and protection performance, can prevent oxidation and short circuits, and is suitable for complex use environments such as temperature differences and bumpy vibrations inside the vehicle. The conductive clip inside the fuse holder is made of copper nickel plated material, which fits tightly with the fuse plug and has extremely low contact resistance, making it less prone to problems such as false connection heating and contact ignition.

This adapter is widely compatible with various passenger cars equipped with medium-sized fuse boxes, with simple and convenient installation and operation, no need for professional tools, no damage to the original vehicle wiring harness structure, and no impact on the vehicle's original factory warranty. It can be used to expand various 12V cigarette lighter interface devices such as car phone chargers, car refrigerators, driving recorders, car inflators, and interior ambient lights. It is particularly suitable for scenarios where the original car cigarette lighter interface is insufficient and requires hidden wiring for power supply. It is a specialized accessory for expanding car power supply that considers practicality, safety, and convenience.