Littelfuse LITRLS RLS Series Class H Fast-Acting Fuse, 600VAC

Littelfuse RLS Series Class H Fast-Acting Fuse, 600VAC

The Littelfuse RLS Series is a Class H fast-acting fuse engineered for reliable overcurrent protection in industrial and commercial power circuits, available in amp ratings from 100A to 110A to match a range of feeder and branch-circuit loads. Rated 600VAC with a 10000A interrupting rating, this knife-blade fuse delivers fast-acting (F) time-current response to protect equipment, feeders, and branch circuits from short-circuit and overload conditions. The RLS Series cross-references directly to Littelfuse's modern Class RK5 (FLSR/FLSR_ID) and Class RK1 (LLSRK/LLSRK_ID) fuse families, giving electrical contractors and maintenance teams a clear, verified upgrade path when servicing or replacing fuses in existing panels and fuse blocks.

Key Features

• Ampere Rating: Available in 100A and 110A ratings, sized for demanding industrial and commercial loads.
• Voltage Rating: 600VAC rating supports use across higher-voltage industrial power distribution circuits.
• Fast-Acting Opening: Fast-Acting (F) time-current response interrupts overcurrent conditions quickly to help limit equipment damage.
• Interrupting Rating: 10000A@600VAC interrupting rating delivers the fault-clearing capacity required for demanding industrial and commercial circuits.
• Knife-Blade Package: Knife-Blade terminal configuration seats securely in compatible fuse blocks and disconnect switches for a reliable connection.
• Class H Cross-Reference: Cross-references to Littelfuse Class RK5 (FLSR/FLSR_ID) and Class RK1 (LLSRK/LLSRK_ID) fuses, simplifying replacement or upgrade sourcing.
• Series Designation: Identified within Littelfuse's RLS Series fuse lineup, alongside related RLN, LKS, and LKN part types sharing the same cross-reference family.

Certifications & Compliance

• UL Listed
• CSA Certified

Technical Specifications

• Series: RLS

Typical Applications

• Industrial Motor and Equipment Circuit Protection
• Panelboard and Switchboard Overcurrent Protection
• Commercial and Industrial Power Distribution Systems
• Fuse Block and Disconnect Switch Installations
• Replacement or Upgrade for Legacy Class H Fuse Installations

Why Littelfuse?

Littelfuse builds the RLS Series to established Class H fuse performance benchmarks, backed by UL Listing and CSA Certification for code-compliant circuit protection. With a 10000A interrupting rating at 600VAC and Fast-Acting time-current response across the 100A-110A range, this fuse is engineered to deliver dependable protection for professional electrical installations. Its documented cross-reference to Littelfuse's current Class RK5 and Class RK1 fuse families gives contractors and facility teams a trusted path to sourcing verified replacements and long-term serviceability.