Bussmann FRS-R-100 Class RK5 Fuse, 100 A, Dual, Blade end x Blade end, 200 kAIC, 10 sec Response

Description

Features

• Engineered with an advanced dual-element, time-delay design, the Bussmann FRS-R-100 provides a minimum 10-second time-delay at 500% of its rated current. This delayed response allows high-inrush startup currents from industrial motors, transformers, and heavy machinery to pass safely while still offering ultra-reliable, fast-acting short-circuit protection if a true electrical fault occurs.
• This fuse belongs to the industry-standard UL Class RK5 branch-circuit category, featuring a rejection groove on the blade terminal to ensure physical compatibility only with standard Class R fuse blocks and disconnect switches. This critical safety design prevents lower-rated or incorrect fuse types from being mistakenly installed into your system, safeguarding personnel and downstream electrical infrastructure.
• Fabricated to safely manage heavy-duty industrial loads, this component is rated for a continuous current of 100 Amps at up to 600 VAC (and up to 300 VDC). It boasts an exceptional interrupting rating of 200,000 Amps RMS Symmetrical, allowing it to easily clear catastrophic high-energy short circuits without rupturing, preventing severe arc flash incidents and equipment destruction.
• Constructed with a high-strength fiberglass tube body and heavy-duty brass knife-blade end terminals, the FRS-R-100 is built to withstand extreme thermal cycling, heavy vibrations, and high-pressure contact clips. The robust materials maintain strict calibration over decades of continuous use, eliminating the mechanical failures and aging degradation common in budget alternatives.
• The FRS-R-100 is fully certified to UL 248-11 standards and CSA Class 1422-02 requirements, providing high-tier current-limitation that significantly reduces peak let-through current and magnetic forces during a fault.

Documentation & Downloads

Specifications