PVM-8

A PVM-8 fuse is a type of speciality fuse developed as an alternative to typical blade-style fuses. The PVM-8, designed and manufactured by Littelfuse, Inc., is a cylindrical-style, quarter-turn fusing solution, offering improved electrical properties, a higher cycle life and greater resetting reliability over traditional blade-style designs. This article will discuss the applications and working principles of PVM-8 fuses.

Application

PVM-8 fuses are suitable for applications that require higher electrical reliability and low cycling rates. These applications include sensitive equipment such as medical devices, power supplies, switches, capacitors, generators, pumps, and other equipment that requires the use of a high-performance fuse. These fuses are perfect for sensitive applications, offering a reliable and proven solution for protecting both the equipment and the environment.

PVM-8 fuses are also suitable for use in automotive, commercial, industrial, and marine applications. In automotive applications, PVM-8 fuses are used for items such as power windows, radio systems, and starter motors. In commercial and industrial applications, PVM-8 fuses are used to protect motor controls, lighting systems, and other sensitive equipment. The PVM-8 fuse is also used in marine applications to protect batteries, navigation systems, and radios.

Working Principle

The PVM-8 fuse is designed using a special spring-loaded cavity design, which allows it to open quickly and reliably when its specified temperature is exceeded, protecting equipment from possible destruction or short circuits. The fuse also features a quarter-turn lockout mechanism, which prevents premature operation of the fuse.

When the current load exceeds the fuse’s specified ampere rating, the internal spring-loaded cavity opens, allowing the internal filament to melt, and effectively cutting off the current. As the current is cut off, the fuse opens and allows the current to dissipate. The fuse then cools and is ready for resetting. The fuses are designed to protect against short circuits, and will reset automatically if the current load is reduced below the specified ampere rating.

The PVM-8 fuse also features a built-in lockout mechanism, which prevents the fuse from resetting during a short circuit. The lockout mechanism must be manually reset before the fuse will reset itself. This feature prevents the fuse from resetting under currents that would cause further damage to the system.

These fuses are designed for applications that require a more reliable and safer solution than traditional blade-style fuses. They offer improved electrical properties, higher cycle life, and greater resetting reliability over traditional blade-style designs. The fuses are UL-rated, and capable of handling up to 8 amperes of current.