Littelfuse 0LKS006.S Equivalent & Substitute Parts

Part Overview

The Littelfuse 0LKS006.S is a 6A 600VAC fast-blow fuse link cartridge designed for electrical and industrial applications. This component is classified as obsolete, making identification of compatible substitute parts essential for system maintenance and component replacement. The fuse link requires a holder for installation and operates within the POWR-GARD® LKS series. Due to its obsolete status, sourcing equivalent or superior alternatives is necessary for ongoing system support.

Substiute Parts

0LKS006.S

Littelfuse Inc.In Stock: 10320LKS006.S Datasheet

Current PartRFQ

KLSR006.T

Littelfuse Inc.In Stock: 742KLSR006.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0LKS006.S is determined by the following critical parameters:

• Current Rating: 6A (must match exactly)
• Voltage Rating - AC: 600 VAC (must match or exceed)
• Response Time: Fast Blow (must match)
• Mounting Type: Requires Holder (must be compatible)
• Approval Certifications: CE, CSA, UL (must maintain compliance)
• Physical Compatibility: Cartridge form factor with holder compatibility

The KLSR006.T meets these substitution criteria while offering enhanced specifications including dual voltage capability (600 VAC / 250 VDC), higher breaking capacity (200kA AC / 20kA DC), and active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The KLSR006.T is the manufacturer-recommended substitute for the obsolete 0LKS006.S. Both components maintain identical current ratings (6A) and AC voltage ratings (600 VAC), ensuring functional compatibility in existing circuits. Both components carry CE, CSA, and UL certifications, maintaining regulatory compliance across electrical and industrial applications.

The KLSR006.T offers significant advantages over the main part: active product status ensures long-term availability, RoHS3 compliance aligns with current environmental regulations, and substantially higher breaking capacity (200kA AC versus 10kA) provides enhanced protection margins. The addition of 250 VDC rating capability extends application flexibility without compromising AC performance.

Physical dimensions differ slightly in length (127.00mm versus 95.20mm), but both maintain the same 20.60mm diameter and cartridge form factor. Holder compatibility must be verified for the specific installation, as the increased length of the KLSR006.T may require assessment in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the KLSR006.T directly replace the 0LKS006.S in all applications?

A: The KLSR006.T matches the critical electrical parameters (6A, 600 VAC, fast-blow response) and maintains identical certifications. Physical compatibility depends on holder design and available mounting space, as the KLSR006.T is 31.80mm longer. Verify holder compatibility before installation.

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

A: Class H and Class RK1 are distinct fuse classifications with different breaking capacities and application ranges. The 0LKS006.S operates as Class H with 10kA breaking capacity, while the KLSR006.T operates as Class RK1 with 200kA AC breaking capacity. Both are fast-blow fuses suitable for electrical and industrial protection, but RK1 provides higher fault current protection.

Q: Does the KLSR006.T's RoHS3 compliance affect performance?

A: RoHS3 compliance indicates the component meets current environmental standards for hazardous substance restrictions. This compliance does not alter electrical performance or protection characteristics; it reflects manufacturing standards and material composition.

Q: Why is the KLSR006.T longer than the 0LKS006.S?

A: The increased length (127.00mm versus 95.20mm) accommodates the enhanced internal design of the RK1 class cartridge, which contributes to the higher breaking capacity (200kA AC). The diameter remains constant at 20.60mm, maintaining holder compatibility for standard cartridge holders.

Q: Is the 250 VDC rating on the KLSR006.T usable in AC-only circuits?

A: Yes. The KLSR006.T is rated for both 600 VAC and 250 VDC operation. In AC-only circuits operating at 600 VAC, the DC rating does not affect performance; the component functions identically to the 0LKS006.S for AC applications.