Littelfuse LLSRK-225ID - Class RK1 Fuse 225A 600V (200kA AIC @ 300VDC)

The Littelfuse LLSRK-225ID is a Class RK1 dual-element time-delay fuse engineered to provide reliable circuit protection against overcurrents and short-circuits in industrial power distribution systems. It features a 600V AC voltage rating and 225A current rating, capable of interrupting up to 200,000 amperes at 300V DC. Constructed with a robust ceramic body and tin-plated copper ferrules, this fuse offers excellent thermal stability and mechanical durability for demanding environments. The device complies with UL/CSA standards for branch circuit protection and is specifically designed for motor circuit protection, feeder circuit protection, and industrial control panel applications where high interrupting capacity and time-delay characteristics are required.

Key Features & Specifications

• Type: Class RK1 dual-element time-delay fuse with ceramic body and tin-plated copper ferrules
• Voltage Rating: 600V AC
• Current Rating: 225A
• AIC Rating: 200,000A @ 300V DC
• Dimensions: Industry-standard RK1 physical dimensions
• Standards: UL 248-12, CSA C22.2 No. 248.12
• Applications: Motor circuit protection, feeder circuits, industrial control panels, power distribution systems
• Weight: 5.19 lb
• Mounting: Standard fuse clip or block mounting
• Operating Temperature: -50°C to +125°C
• Interrupting Rating: 200kA RMS symmetrical
• Time Delay: Provides time-delay characteristics to withstand motor starting currents