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The MERSEN RF30 is a 250-volt renewable fuse designed for overcurrent protection in electrical distribution systems. Renewable fuses allow the fusible element to be replaced after operation, making them a serviceable alternative to one-time-use fuses in applications where repeated servicing is expected. This fuse is installed by licensed electricians in panel boards, disconnect switches, and branch circuit applications where a rebuildable fuse design is specified. The 250-volt rating makes it suitable for standard single-phase and multi-phase low-voltage branch circuits.
The RF30 is used in commercial and industrial electrical installations where renewable fuse holders are already in service. It fits into existing renewable fuse blocks and holders designed for this fuse class. Electricians servicing older electrical infrastructure or facilities that standardize on renewable fuse technology will find this a direct-fit replacement for worn or operated fusible elements.
Designed as an OEM-style replacement for renewable fuse holders and disconnect blocks rated for 250-volt renewable fuses.
Installation and servicing should be performed by a qualified electrician in accordance with NEC requirements. De-energize and lock out the circuit before opening any fuse holder or disconnect. Verify that the replacement fusible element matches the ampere rating of the original before reassembling the fuse body. Never operate a fuse holder with a missing or damaged fuse body end cap.
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