Westinghouse 5CLSA-18R Current Limiting High Voltage Fuse

The Westinghouse 5CLSA-18R is a 390 A current-limiting high-voltage fuse rated for 5.08 kV, engineered for dependable overcurrent protection and rapid fault interruption in medium-voltage power distribution systems. With a CLS-22 fuse class designation and MPN 5CLSA-18R, it is intended for installation in switchgear, motor control centers, and other medium-voltage equipment used in industrial facilities and utility infrastructure. It provides essential overcurrent protection and fault interruption to protect circuits and downstream devices during overload events while supporting replacement and retrofit projects in manufacturing and utility environments. Common replacements listed for this Westinghouse fuse include Eaton CLSA-18R, Bussmann EJO-5.5E, and Littelfuse KLPC, reflecting its role as a standard option for upgrading legacy switchgear and power distribution networks. Typical applications encompass industrial electrical protection and power distribution across switchgear, medium-voltage equipment, and motor control systems, where reliable current limiting and high-voltage interruption are required.