Littelfuse KLNR400 - RK1 Class Fuse 400A@250V (200kA AIC)

Littelfuse KLNR400 is a low-voltage current-limiting fuse designed for high-interrupting-capacity circuit protection in industrial electrical systems. This RK1-class fuse features a 400A current rating and 250V voltage rating with a 200kA interrupting capacity at rated voltage, housed in a durable single-barrel construction measuring 2.09 inches in diameter. The 2 lb fuse meets stringent industry standards for reliable overcurrent protection in demanding environments. Typical applications include motor control centers, switchgear, and industrial power distribution systems where high fault current interruption is critical.

Key Features & Specifications

• Type: KLNR series current-limiting fuse, RK1 class
• Voltage Rating: 250V AC
• Current Rating: 400A
• Dimensions: 2.09" diameter single-barrel design
• Standards: UL/CSA recognized
• Applications: Industrial power distribution, motor protection
• AIC rating: 200kA@250V
• Class Rating: RK1
• Weight: 2 lb