Littelfuse 0LKS175.V Fuse Link - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0LKS175.V is a 175A 600VAC cylindrical fuse link from the POWR-GARD® LKS series, designed for electrical and industrial applications requiring fast-blow response characteristics. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain system functionality and ensure continued availability for replacement and new installations.

Substiute Parts

0LKS175.V

Littelfuse Inc.In Stock: 8200LKS175.V Datasheet

Current PartRFQ

KLSR175.X

Littelfuse Inc.In Stock: 966KLSR175.X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse KLSR175.X cartridge fuse qualifies as a manufacturer-recommended substitute based on the following critical parameters:

• Current Rating Match: Both parts are rated at 175A, ensuring equivalent load protection
• AC Voltage Rating Match: Both parts maintain 600 VAC rating, compatible with the original application voltage
• Response Time Match: Both employ fast-blow characteristics for identical circuit protection behavior
• Mounting Compatibility: Both require holder mounting with cylindrical blade terminals
• Manufacturer Continuity: Both are Littelfuse products within the POWR-GARD® family, ensuring design consistency
• Approval Certifications: Both carry CE, CSA, and UL certifications, maintaining regulatory compliance

The primary distinction is the fuse type transition from Fuse Link (Class H) to Cartridge (Class RK1), which represents an upgrade in breaking capacity and operational performance while maintaining core protective function at the specified current and voltage ratings.

Parameter Comparison

Engineering Selection Recommendations

The KLSR175.X cartridge fuse is the appropriate substitute for the obsolete 0LKS175.V fuse link based on the following engineering criteria:

Product Status: The 0LKS175.V is obsolete, while the KLSR175.X maintains active product status with current manufacturing and inventory availability (888 pcs in stock versus 785 pcs for the obsolete part).

Regulatory Compliance: Both parts carry identical approval certifications (CE, CSA, UL). The KLSR175.X achieves ROHS3 compliance, representing an improvement in environmental standards compared to the non-compliant 0LKS175.V.

Electrical Performance: The 175A current rating and 600 VAC voltage rating are identical, ensuring equivalent protection in AC applications. The KLSR175.X provides enhanced breaking capacity (200kA AC versus 10kA), offering superior fault current handling without compromising the primary protective function.

Physical Compatibility: Both parts employ cylindrical blade terminals and require holder mounting. The KLSR175.X is 2.748" longer (244.50mm versus 174.70mm), which must be verified against available holder depth in the installation.

DC Capability: The KLSR175.X adds 300 VDC rating, providing expanded application flexibility for mixed AC/DC systems.

Frequently Asked Questions (FAQ)

Q: Can the KLSR175.X directly replace the 0LKS175.V in existing installations?

A: The KLSR175.X is electrically equivalent at 175A 600VAC with identical fast-blow response. Physical verification is required: the substitute is 2.748" longer and must fit within the existing holder assembly. Blade terminal compatibility must be confirmed with the specific holder model.

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

A: Class H fuses (0LKS175.V) have a breaking capacity of 10kA. Class RK1 fuses (KLSR175.X) have a breaking capacity of 200kA AC, providing enhanced protection against high fault currents. Both classes maintain identical response time and current rating characteristics.

Q: Does the KLSR175.X provide DC protection?

A: Yes. The KLSR175.X is rated for 300 VDC in addition to 600 VAC, whereas the 0LKS175.V does not specify DC capability. This makes the substitute suitable for applications requiring both AC and DC circuit protection.

Q: Are there any compliance differences between these parts?

A: The KLSR175.X is ROHS3 compliant, while the 0LKS175.V is RoHS non-compliant. Both carry CE, CSA, and UL certifications. The substitute represents an improvement in environmental compliance standards.

Q: What should be verified before installation?

A: Confirm holder depth accommodates the 244.50mm length of the KLSR175.X. Verify blade terminal compatibility with the existing holder assembly. Confirm that the application does not require the specific Class H characteristics of the original part.