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

Littelfuse LLSRK-400 is a Class RK1 low-voltage fuse designed for high-interrupting capacity circuit protection in industrial power distribution systems. It features a 600V AC voltage rating and 400A current rating with a 300kA interrupting capacity at 600V AC for reliable fault protection. The fuse has a compact cylindrical design with a 2.59" diameter and clip-style connection, constructed as a single-barrel unit weighing 15 lb. It meets industry standards for RK1 fuses, providing time-delay characteristics to withstand temporary overloads while responding quickly to short circuits. Typical applications include motor control centers, switchgear, and industrial control panels requiring durable overcurrent protection.

Key Features & Specifications

• Type: Class RK1 time-delay fuse, single barrel construction
• Voltage Rating: 600V AC
• Current Rating: 400A
• Dimensions: 2.59" diameter
• Standards: RK1 classification
• Applications: Industrial power distribution, motor protection, switchgear
• Connection: Clip-style terminals
• AIC rating: 300kA @ 600V AC
• Weight: 15 lb