RS PRO 1A FF Ceramic Cartridge Fuse 5 x 20 mm 250V ac Super Fast Acting 420-072

RS PRO 420-072 Ceramic Cartridge Fuse 1A FF is a super fast acting fuse designed for electrical circuit protection operating at 250V AC. It features a compact 5 x 20 mm ceramic body constructed to withstand high operating temperatures and electrical stresses. This fuse is specifically engineered for semiconductor device protection where rapid response to over-current conditions is critical.

The RS PRO range offers miniature cartridge fuses characterized by ultra rapid (FF) blowing characteristics, making them suitable for sensitive components such as thyristors, diodes, and transistors. The 1 ampere fuse rating ensures appropriate current limiting for low power circuits and provides effective short circuit and overcurrent protection.

The ceramic body ensures electrical insulation and mechanical robustness, while the fuse’s high breaking capacity (HBC) reduces risk of damage during fault conditions. Its dimensions of 5 mm diameter and 20 mm length conform to standard fuse sizes widely used in industrial control panels, household appliances, automotive electrical systems, pumps, and HVAC equipment.

Compliant with UL and RoHS certifications, RS PRO fuses meet strict quality and safety standards. These fuses are designed and manufactured in Germany ensuring high reliability and product consistency. Users must replace the fuse once blown to maintain operational safety and circuit integrity, as fuses are one-time protective devices.

Typical applications include circuit protection in industrial machinery, commercial electrical distribution, home residential electrical systems, and automotive electronics. The fuse’s cylindrical shape and standard size allow easy installation in compatible fuse holders for quick maintenance.

Miniature ceramic Cartridge Fuse measuring 5 mm diameter by 20 mm length. Ultra rapid (FF) fuse speed for fast acting overload protection. Rated current of 1 ampere suitable for low current applications. High breaking capacity ensures safe interruption of fault currents.

Cylindrical ceramic body material for thermal and electrical resistance. Designed for protection of semiconductors like thyristors, diodes, and transistors. Operating temperature range up to 0°C maximum as specified. Complies with UL and RoHS standards and is manufactured in Germany.

Ideal for industrial, commercial, residential, and automotive electrical protection uses. Fits standard 5 x 20 mm fuse holders commonly used in boards and panels. Explore more RS PRO electrical protection devices and fuses at EnvMart for reliable industrial and commercial circuit safety solutions.