0LKS005.S Equivalent & Substitute Parts

Part Overview

The 0LKS005.S is a 5A 600VAC cartridge fuse link from Littelfuse Inc.'s POWR-GARD® LKS series. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing maintenance and system support. The fuse link requires a holder for installation and is designed for fast-blow response in electrical and industrial applications. Due to its obsolete status, equivalent active alternatives must be evaluated based on electrical compatibility and mechanical fit parameters.

Substiute Parts

0LKS005.S

Littelfuse Inc.In Stock: 7400LKS005.S Datasheet

Current PartRFQ

KLSR005.T

Littelfuse Inc.In Stock: 836KLSR005.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0LKS005.S is determined by the following critical parameters:

• Current Rating: Must be 5A to maintain circuit protection design intent
• Voltage Rating - AC: Must be rated for 600 VAC minimum
• Response Time: Fast Blow characteristic must be preserved
• Mounting Type: Must require holder (cartridge form factor)
• Approval Certifications: Must maintain CE, CSA, and UL approvals for regulatory compliance
• Physical Dimensions: Cartridge diameter and length must be compatible with existing holder hardware

The KLSR005.T meets these substitution criteria as an active alternative from the same manufacturer, with enhanced electrical specifications and improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

The KLSR005.T is the manufacturer-recommended substitute for the 0LKS005.S. Both components share identical current and AC voltage ratings with matching fast-blow response characteristics and holder-based mounting requirements. Both maintain CE, CSA, and UL certifications.

The KLSR005.T offers the following advantages:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance meets current environmental regulations
• Enhanced breaking capacity (200kA AC versus 10kA) provides superior fault protection
• Additional 250 VDC rating extends application flexibility
• Slightly longer physical length (5.000" versus 3.748") requires verification of holder compatibility

The primary consideration for substitution is physical length compatibility with existing holder hardware. The KLSR005.T's increased length (127.00mm versus 95.20mm) must be confirmed as acceptable within the installation environment before deployment.

Frequently Asked Questions (FAQ)

Q: Can the KLSR005.T be used as a direct replacement for the 0LKS005.S?

A: The KLSR005.T matches all critical electrical parameters (5A, 600 VAC, fast-blow response). However, the physical length difference (127.00mm versus 95.20mm) requires confirmation that the existing holder accommodates the longer cartridge. Mechanical fit must be verified before installation.

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

A: Class designation reflects fuse construction and breaking capacity characteristics. The 0LKS005.S is Class H with 10kA breaking capacity. The KLSR005.T is Class RK1 with 200kA AC breaking capacity, providing enhanced protection in high-fault-current environments. Both classes are suitable for industrial and electrical applications.

Q: Does the KLSR005.T's 250 VDC rating affect AC-only applications?

A: No. The additional 250 VDC rating does not impact AC circuit performance. The 600 VAC rating remains the controlling specification for AC applications. The DC rating simply extends the component's application range.

Q: Are both parts approved for the same regulatory standards?

A: Yes. Both the 0LKS005.S and KLSR005.T carry CE, CSA, and UL certifications, meeting equivalent regulatory requirements for electrical and industrial applications.

Q: Why is the KLSR005.T longer than the 0LKS005.S?

A: The increased length (127.00mm versus 95.20mm) is associated with the RK1 class construction and enhanced breaking capacity design. This is a standard design characteristic and does not affect electrical performance in AC circuits.