Littelfuse 0RLS110.X Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0RLS110.X is a 110A, 600 VAC cylindrical fuse cartridge from the POWR-GARD® RLS series, designed for electrical and industrial applications requiring fast-blow response characteristics. This part is classified as obsolete, necessitating identification of active equivalent components that maintain functional compatibility while meeting current availability and compliance requirements.

Substiute Parts

0RLS110.X

Littelfuse Inc.In Stock: 12180RLS110.X Datasheet

Current PartRFQ

KLSR110.X

Littelfuse Inc.In Stock: 1206KLSR110.X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0RLS110.X is determined by the following critical parameters:

• Current Rating: 110A (exact match required)
• AC Voltage Rating: 600 VAC (minimum requirement)
• Fuse Type: Cartridge with blade terminals
• Response Characteristic: Fast Blow
• Mounting Configuration: Requires holder compatibility
• Approval Certifications: CE, CSA, UL compliance

The KLSR110.X qualifies as a direct substitute based on matching current rating, AC voltage rating, fuse type, response time, and mounting requirements. The substitute part provides enhanced specifications including DC voltage capability (300 VDC) and increased breaking capacity (200kA AC), representing a performance upgrade while maintaining backward compatibility with existing holder installations.

Parameter Comparison

Engineering Selection Recommendations

The KLSR110.X is the qualified substitute for the obsolete 0RLS110.X based on the following engineering criteria:

• Functional Equivalence: Both parts maintain identical current rating (110A), AC voltage rating (600 VAC), fuse type (cartridge), response characteristic (fast blow), and mounting configuration (requires holder).
• Certification Alignment: Both parts carry CE, CSA, and UL approvals, ensuring regulatory compliance across equivalent application domains.
• Product Availability: The KLSR110.X is active production status with confirmed inventory, whereas the 0RLS110.X is obsolete.
• Compliance Enhancement: The KLSR110.X achieves ROHS3 compliance, addressing modern environmental and regulatory requirements not met by the original part.
• Performance Upgrade: The substitute provides increased breaking capacity (200kA AC versus 10kA) and extended voltage capability (300 VDC), representing a performance improvement without compromising backward compatibility.

Frequently Asked Questions (FAQ)

Q: Can the KLSR110.X be used as a direct replacement in existing 0RLS110.X installations?

A: Yes. Both parts share identical current rating (110A), AC voltage rating (600 VAC), cartridge fuse type, fast-blow response, and holder-based mounting configuration. The KLSR110.X is mechanically and electrically compatible with existing holder installations designed for the 0RLS110.X.

Q: What is the physical difference between these parts?

A: The KLSR110.X has a longer cylindrical body (9.626" L versus 6.878" L). Verify that the fuse holder accommodates the increased length before installation.

Q: Does the KLSR110.X provide additional capabilities?

A: The KLSR110.X includes 300 VDC voltage rating and 200kA AC breaking capacity compared to the 0RLS110.X specification of 10kA. These represent performance enhancements that do not affect AC 600 VAC applications.

Q: Are both parts certified to the same standards?

A: Yes. Both the 0RLS110.X and KLSR110.X carry CE, CSA, and UL approvals.

Q: Why is the 0RLS110.X obsolete?

A: The 0RLS110.X is classified as obsolete by the manufacturer. The KLSR110.X from the POWR-GARD® KLSR series is the active production equivalent.