Equivalent & Substitute Parts for 0RLS003.T

Part Overview

The 0RLS003.T is a 3A 600VAC fast-blow fuse cartridge from Littelfuse Inc.'s POWR-GARD® RLS series, designed for electrical and industrial applications requiring holder-mounted protection. This part is classified as obsolete, making identification of compatible substitutes essential for system maintenance and component procurement. The substitute part maintains the same current rating, voltage specification, and physical dimensions while offering enhanced performance characteristics and active product status.

Substiute Parts

0RLS003.T

Littelfuse Inc.In Stock: 10660RLS003.T Datasheet

Current PartRFQ

KLSR003.T

Littelfuse Inc.In Stock: 777KLSR003.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The KLSR003.T qualifies as a direct substitute for the 0RLS003.T based on the following critical parameters:

• Current Rating: Both parts are rated at 3A
• AC Voltage Rating: Both parts are rated at 600 VAC
• Fuse Type: Both are cartridge-type fuses requiring holder mounting
• Response Time: Both exhibit fast-blow characteristics
• Physical Dimensions: Identical at 0.811" Dia x 5.000" L (20.60mm x 127.00mm)
• Approval Certifications: Both carry CE, CSA, and UL approvals

The KLSR003.T additionally provides 250 VDC capability and operates under the RK1 fuse class with significantly higher breaking capacity (200kA AC, 20kA DC versus 10kA), making it suitable for applications requiring enhanced performance margins.

Parameter Comparison

Engineering Selection Recommendations

The KLSR003.T is the appropriate substitute for the obsolete 0RLS003.T. Both parts share identical electrical ratings for AC operation (3A, 600 VAC) and physical form factors, ensuring direct mechanical and electrical compatibility within existing holder assemblies.

The KLSR003.T offers additional advantages: active product status ensures ongoing availability, ROHS3 compliance meets current environmental regulations, and the enhanced breaking capacity (200kA AC) provides superior fault protection margins. The RK1 fuse class designation reflects improved performance characteristics compared to the H class of the original part.

For applications operating exclusively at 600 VAC AC, the KLSR003.T provides equivalent protection with enhanced reliability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the KLSR003.T be used as a direct replacement for the 0RLS003.T in existing installations?

A: Yes. Both parts are identical in current rating (3A), AC voltage rating (600 VAC), physical dimensions (0.811" Dia x 5.000" L), and mounting requirements (holder-mounted cartridge). The KLSR003.T will function identically in any circuit designed for the 0RLS003.T.

Q: What is the difference between the H and RK1 fuse classes?

A: The H class (0RLS003.T) and RK1 class (KLSR003.T) are both fast-blow cartridge fuse classifications. The RK1 class provides higher breaking capacity (200kA AC versus 10kA), offering enhanced protection in circuits with higher available fault currents.

Q: Does the KLSR003.T's 250 VDC rating affect its use in 600 VAC applications?

A: No. The 250 VDC rating is an additional capability that does not impact AC operation. The part maintains full 600 VAC performance and is suitable for applications requiring either AC or DC protection.

Q: Why is the 0RLS003.T listed as obsolete?

A: Product obsolescence reflects manufacturer discontinuation. The KLSR003.T represents the active equivalent, offering the same core functionality with improved performance specifications and regulatory compliance.

Q: Are both parts certified by the same approval agencies?

A: Yes. Both the 0RLS003.T and KLSR003.T carry CE, CSA, and UL certifications, ensuring compliance with international electrical safety standards.