Littelfuse 0RLS030.T Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0RLS030.T is a 30A 600VAC fast-blow cartridge fuse from the POWR-GARD® RLS series, designed for electrical and industrial applications requiring holder-mounted protection. This part is classified as obsolete, necessitating identification of active equivalent components that maintain the same electrical and mechanical specifications for continued system support and procurement.

Substiute Parts

0RLS030.T

Littelfuse Inc.In Stock: 8610RLS030.T Datasheet

Current PartRFQ

KLSR030.T

Littelfuse Inc.In Stock: 761KLSR030.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0RLS030.T is determined by strict equivalence across the following critical parameters:

• Current Rating: 30A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Response Time: Fast Blow (exact match required)
• Physical Dimensions: 0.811" Dia x 5.000" L (exact match required for holder compatibility)
• Fuse Type: Cartridge (exact match required)
• Mounting Configuration: Requires Holder (exact match required)

The KLSR030.T meets all mandatory substitution criteria while offering enhanced specifications including DC voltage capability and improved breaking capacity, with active product status and current compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The KLSR030.T is the direct substitute for the obsolete 0RLS030.T. Both components share identical electrical ratings (30A, 600 VAC), response characteristics (fast-blow), and physical dimensions (0.811" Dia x 5.000" L), ensuring mechanical and electrical compatibility within existing holder-based installations.

The KLSR030.T provides additional advantages: active product status ensures ongoing availability and supply chain continuity, ROHS3 compliance meets current environmental regulations, and enhanced breaking capacity (200kA AC versus 10kA) provides superior fault protection margins. Both parts maintain equivalent UL, CSA, and CE certifications.

Selection of the KLSR030.T eliminates obsolescence risk while maintaining full backward compatibility with the 0RLS030.T installation footprint and electrical performance envelope.

Frequently Asked Questions (FAQ)

Q: Can the KLSR030.T be used as a direct replacement for the 0RLS030.T in existing installations?

A: Yes. Both fuses share identical current rating (30A), AC voltage rating (600 VAC), response time (fast-blow), physical dimensions (0.811" Dia x 5.000" L), and holder mounting requirements. The KLSR030.T is mechanically and electrically interchangeable.

Q: What is the significance of the class difference between H and RK1?

A: Class H and Class RK1 are distinct fuse classifications. The KLSR030.T's RK1 classification provides enhanced breaking capacity (200kA AC) compared to the 0RLS030.T's Class H rating (10kA), offering improved fault current protection. Both classes are approved for the specified voltage and current ratings.

Q: Does the KLSR030.T's DC voltage rating (250 VDC) affect AC-only applications?

A: No. The KLSR030.T maintains full 600 VAC rating identical to the 0RLS030.T. The additional 250 VDC capability expands application flexibility without affecting AC performance.

Q: Are there packaging differences between these parts?

A: The 0RLS030.T is supplied without specified packaging, while the KLSR030.T is packaged in boxes. Both are cartridge fuses requiring holder installation. Packaging does not affect electrical or mechanical compatibility.

Q: Why is RoHS compliance important for this substitution?

A: The KLSR030.T is ROHS3 compliant, meeting current environmental and regulatory requirements for electrical components. The obsolete 0RLS030.T is RoHS non-compliant. Selecting the KLSR030.T ensures compliance with modern procurement and environmental standards.

Q: Are both parts approved by the same certification agencies?

A: Yes. Both the 0RLS030.T and KLSR030.T carry identical approvals: CE, CSA, and UL. Certification equivalence confirms suitability for the same regulated applications and markets.