Littelfuse KLSR200 200A Class RK1 Fast-Acting Fuse – Knife-Blade – 600VAC/300VDC

The Littelfuse KLSR200 is a Class RK1 fast-acting current-limiting fuse designed for reliable short-circuit protection in industrial and commercial power systems. Built with a single-element silver link construction, it provides rapid response to overcurrent conditions. This fuse is commonly used for protecting surge-sensitive equipment such as variable speed drives, rectifiers, and other electronic loads, though it may require oversizing in inductive applications to avoid nuisance operation from inrush currents.

Voltage and Rating

• Current Rating: 200 Amps
• Voltage Rating: 600 Volts AC
• DC Voltage Rating: 300 Volts DC
• Interrupting Rating: 200 kA AIR (up to 20 kA @ 300 VDC)

Key Specifications

• Fuse Type: Fast-Acting (F)
• Fuse Class: Class RK1
• Mounting Type: Knife-Blade
• Series: KLSR
• Family Style: Current Limiting Fuse
• Application: Short-circuit protection for industrial electrical systems

Technical Specifications

• Opening Characteristic: Fast-Acting
• Current Limiting: Yes
• Interrupt Amperage: 200,000 Amps
• Construction: Single-element silver link design
• Suitable For: Variable speed drives, rectifiers, surge-sensitive equipment
• Safety Rating: High interrupting capacity reduces need for extensive fault calculations

Product Data

• Manufacturer: Littelfuse
• Model Number: KLSR200
• Series: KLSR RK1 Fast-Acting Fuse

Features

• Extremely current-limiting performance for fast fault interruption
• Reliable protection up to 200 kA available fault current
• Helps minimize equipment damage from short-circuit energy
• Knife-blade design for standard fuse holders
• Ideal for industrial distribution and electronic protection systems