Littelfuse 0RLS090.V Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0RLS090.V is a 90A 600VAC cylindrical fuse cartridge from the POWR-GARD® RLS series, designed for electrical and industrial applications requiring fast-blow protection. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain the same electrical and mechanical compatibility within the cartridge fuse category.

Substiute Parts

0RLS090.V

Littelfuse Inc.In Stock: 10340RLS090.V Datasheet

Current PartRFQ

KLSR090.V

Littelfuse Inc.In Stock: 1057KLSR090.V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse KLSR090.V qualifies as a manufacturer-recommended substitute based on the following critical parameters:

• Current Rating Match: Both parts are rated at 90A
• AC Voltage Compatibility: Both parts support 600 VAC operation
• Fuse Type Consistency: Both are cartridge-type fuses with blade terminals
• Response Characteristic: Both employ fast-blow response time
• Mounting Compatibility: Both require a holder for installation
• Cylindrical Package: Both use cylindrical, blade terminal construction
• Regulatory Approvals: Both carry CE, CSA, and UL certifications

The KLSR090.V represents an upgrade path from the obsolete RLS series to the active POWR-GARD® KLSR series while maintaining electrical and mechanical compatibility for 600 VAC applications.

Parameter Comparison

Engineering Selection Recommendations

The KLSR090.V is the active equivalent for the obsolete 0RLS090.V based on product lifecycle status and regulatory compliance. The substitute maintains identical current and AC voltage ratings, ensuring electrical compatibility in 600 VAC circuits. Both parts carry equivalent international certifications (CE, CSA, UL), supporting deployment in regulated industrial and electrical applications.

The KLSR090.V offers enhanced breaking capacity (200kA AC versus 10kA) and RoHS3 compliance, representing a performance and environmental improvement over the original part. The dimensional difference in length (7.874" versus 5.874") must be verified for physical fit within the existing fuse holder assembly.

Frequently Asked Questions (FAQ)

Q: Can the KLSR090.V directly replace the 0RLS090.V in existing installations?

A: Electrical compatibility is confirmed for 600 VAC circuits at 90A. Physical compatibility depends on fuse holder dimensions. The KLSR090.V is 2 inches longer; verify that the holder accommodates the increased length before installation.

Q: What is the difference between Class H and Class RK1 fuses?

A: Class designation indicates the fuse's performance characteristics and breaking capacity. The KLSR090.V (RK1) provides significantly higher breaking capacity (200kA AC) compared to the 0RLS090.V (Class H, 10kA), offering enhanced protection in high-fault-current environments.

Q: Does the KLSR090.V support DC applications?

A: Yes. The KLSR090.V is rated for 300 VDC operation in addition to 600 VAC. The original 0RLS090.V does not specify DC capability. If DC operation is required, the KLSR090.V provides this additional functionality.

Q: Are both parts RoHS compliant?

A: The 0RLS090.V is RoHS non-compliant. The KLSR090.V is ROHS3 compliant, meeting current environmental regulations for new equipment designs and procurement.

Q: What certifications apply to both parts?

A: Both the 0RLS090.V and KLSR090.V carry CE, CSA, and UL approvals, supporting use in North American and European industrial applications.