Littelfuse 0RLS100.V Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0RLS100.V is a 100A, 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 alternatives that maintain functional compatibility while meeting current availability and compliance requirements.

Substiute Parts

0RLS100.V

Littelfuse Inc.In Stock: 7460RLS100.V Datasheet

Current PartRFQ

KLSR100.V

Littelfuse Inc.In Stock: 810KLSR100.V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse KLSR100.V qualifies as a direct substitute based on the following critical parameters:

• Current Rating: Both parts are rated at 100A
• AC Voltage Rating: Both parts are rated at 600 VAC
• Fuse Type: Both are cartridge-type fuses
• Response Time: Both exhibit fast-blow characteristics
• Mounting Configuration: Both require a holder and use cylindrical blade terminals
• Approval Certifications: Both carry CE, CSA, and UL approvals

The KLSR100.V represents an enhanced alternative, offering extended voltage capability (300 VDC rating) and superior breaking capacity (200kA AC versus 10kA AC), while maintaining full compatibility with the original 0RLS100.V specifications for AC applications at 600 VAC and 100A.

Parameter Comparison

Engineering Selection Recommendations

The KLSR100.V is the recommended substitute for the obsolete 0RLS100.V based on the following factors:

• Active Product Status: The KLSR100.V is an active product with current manufacturing and availability, whereas the 0RLS100.V is obsolete
• Certification Continuity: Both parts maintain identical approval certifications (CE, CSA, UL), ensuring regulatory compliance across applications
• Enhanced Compliance: The KLSR100.V achieves ROHS3 compliance, addressing modern environmental and regulatory requirements
• Functional Equivalence: The substitute maintains 100A current rating and 600 VAC AC voltage rating, ensuring direct compatibility in existing 600 VAC AC circuits
• Improved Performance Margin: The KLSR100.V provides significantly higher breaking capacity (200kA AC), offering enhanced protection margins in industrial electrical systems

The dimensional difference (length: 5.874" versus 7.874") must be verified for physical fit within existing fuse holders before implementation.

Frequently Asked Questions (FAQ)

Q: Can the KLSR100.V be used as a direct replacement for the 0RLS100.V in 600 VAC AC applications?

A: Yes. Both parts share identical current rating (100A), AC voltage rating (600 VAC), fuse type (cartridge), response time (fast-blow), and approval certifications (CE, CSA, UL). The KLSR100.V is electrically and functionally equivalent for 600 VAC AC circuits.

Q: What is the significance of the dimensional difference between these parts?

A: The KLSR100.V is 2.0 inches longer (7.874" L versus 5.874" L). Physical verification of the fuse holder cavity is required to confirm the substitute will fit within the existing mounting assembly before installation.

Q: Why does the KLSR100.V have a higher breaking capacity?

A: The KLSR100.V is classified as RK1, whereas the 0RLS100.V is classified as H. The RK1 classification provides enhanced breaking capacity (200kA AC) compared to the H classification (10kA), offering superior fault protection in modern industrial electrical systems.

Q: Does the KLSR100.V's 300 VDC rating affect its use in 600 VAC AC applications?

A: No. The 300 VDC rating is an additional capability that does not impact AC performance. The part remains fully rated for 600 VAC AC operation and is suitable for replacement in existing AC circuits.

Q: Is RoHS compliance a requirement for this substitution?

A: RoHS compliance depends on application and regulatory jurisdiction. The KLSR100.V achieves ROHS3 compliance, whereas the 0RLS100.V does not. If RoHS compliance is mandated, the KLSR100.V satisfies this requirement.

Q: Are there any compatibility concerns with existing fuse holders?

A: Compatibility depends on holder design and cavity dimensions. The cylindrical blade terminal configuration is identical between parts, but the length difference (2.0 inches) requires physical verification that the KLSR100.V will seat properly within the existing holder assembly.