Littelfuse 0LKS070.T Equivalent & Substitute Parts

Part Overview

The Littelfuse 0LKS070.T is a 70A 600VAC cylindrical fuse link designed for electrical and industrial applications. This component is classified as obsolete, making identification of suitable substitute parts essential for system maintenance and component replacement. The fuse link requires a holder for installation and provides fast-blow response characteristics with a 10kA breaking capacity at rated voltage. Due to its obsolete status, active equivalent models are necessary to ensure continued availability and system reliability.

Substiute Parts

0LKS070.T

Littelfuse Inc.In Stock: 9210LKS070.T Datasheet

Current PartRFQ

KLSR070.V

Littelfuse Inc.In Stock: 795KLSR070.V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse KLSR070.V serves as the manufacturer-recommended substitute for the 0LKS070.T. Substitution eligibility is determined by the following critical parameters:

• Current Rating: Both parts rated at 70A
• Voltage Rating - AC: Both rated at 600 VAC
• Response Time: Both provide fast-blow characteristics
• Mounting Type: Both require holder installation
• Package / Case: Both feature cylindrical design with blade terminals
• Approval Certifications: Both carry CE, CSA, and UL approvals

The KLSR070.V represents an upgrade path, offering enhanced specifications including 300 VDC capability, higher breaking capacity (200kA AC / 20kA DC), and active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The KLSR070.V is the appropriate substitute for the obsolete 0LKS070.T based on the following factors:

• Both parts maintain identical current and AC voltage ratings, ensuring functional equivalence in 70A 600VAC circuits
• Both components carry identical approval certifications (CE, CSA, UL), meeting regulatory requirements
• The KLSR070.V offers superior breaking capacity specifications and active product status, providing enhanced reliability and long-term availability
• The KLSR070.V achieves RoHS3 compliance, addressing modern environmental and regulatory standards
• Physical compatibility is maintained through identical cylindrical design and blade terminal configuration, though dimensional length differs by 2.0mm

The transition from Class H (0LKS070.T) to Class RK1 (KLSR070.V) represents a specification enhancement suitable for industrial and electrical applications requiring higher fault current protection.

Frequently Asked Questions (FAQ)

Q: Can the KLSR070.V directly replace the 0LKS070.T in existing installations?

A: Yes, the KLSR070.V provides direct functional replacement for 70A 600VAC applications. Both components share identical current and voltage ratings, fast-blow response characteristics, and blade terminal configuration. Physical mounting compatibility is maintained through identical holder requirements and cylindrical design. The length difference of 2.0mm (149.20mm vs 200.00mm) must be verified against available holder space.

Q: What is the significance of the Class change from H to RK1?

A: Class H and Class RK1 represent different fuse classifications with distinct breaking capacity ratings. The KLSR070.V (RK1) provides substantially higher breaking capacity (200kA AC vs 10kA AC), offering enhanced protection in circuits with higher available fault currents. This represents an upgrade in protective capability.

Q: Does the KLSR070.V's 300 VDC rating affect AC-only applications?

A: No. The 300 VDC rating on the KLSR070.V is an additional capability that does not impact performance in 600VAC applications. The part maintains full compatibility with the original 600VAC specification.

Q: Are there any compliance differences between these parts?

A: Both parts carry CE, CSA, and UL approvals. The KLSR070.V achieves RoHS3 compliance, while the 0LKS070.T is RoHS non-compliant. For applications subject to RoHS requirements, the KLSR070.V is the compliant choice.

Q: What inventory considerations apply to this substitution?

A: The 0LKS070.T is obsolete with limited remaining stock (890 pcs). The KLSR070.V is an active product with current inventory availability (699 pcs), ensuring reliable long-term sourcing for future replacements and system maintenance.