Littelfuse LLSRK-400ID - RK1 Class Fuse 400A (300kA AIC @600V)

Littelfuse LLSRK-400ID is a low voltage current-limiting fuse from the Powr-Gard family designed to provide high-interrupting capacity protection for industrial electrical systems. It features a 600V AC voltage rating and a 400A current rating, capable of safely interrupting faults up to 300kA at 600V AC. The fuse is constructed as a single-barrel unit with a 2.59-inch diameter and utilizes clip-style connections, meeting the RK1 class rating for time-delay characteristics. This fuse complies with industry standards for high-performance circuit protection and is engineered for demanding applications including industrial control panels, motor branch circuits, and feeder circuits where reliable overcurrent protection is critical.

Key Features & Specifications

• Type: LLSRK_ID, RK1 Class Time-Delay Current-Limiting Fuse
• Voltage Rating: 600V AC
• Current Rating: 400A
• AIC Rating: 300kA@600V AC
• Class Rating: RK1
• Connection: Clip
• Barrels: 1
• Diameter: 2.59 inches
• Weight: 15 lb
• Item Subcategory: Low Voltage
• Family: Powr-Gard