KLU-700 Equivalent & Substitute Parts

Part Overview

The KLU-700 is a 700A 600VAC cylindrical cartridge fuse with bolt mount configuration, manufactured by Eaton - Bussmann Electrical Division under the Limitron™ KLU series. This component is classified as an L-class slow-blow fuse designed for electrical and industrial applications requiring high current protection at 600VAC. The part maintains active product status with 722 units currently in stock.

Equivalent and substitute parts are identified to provide procurement flexibility, ensure supply chain continuity, and support applications where alternative manufacturers' components meet identical electrical and mechanical specifications.

Substiute Parts

KLU-700

Eaton - Bussmann Electrical DivisionIn Stock: 810KLU-700 Datasheet

Current PartRFQ

KLLU700.X

Littelfuse Inc.In Stock: 1107KLLU700.X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KLU-700 is determined by strict equivalence across the following critical parameters:

• Current Rating: 700A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Class: L (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Bolt Mount (exact match required)
• Package Configuration: Cylindrical, Blade Terminal (Bolt) (exact match required)
• Physical Dimensions: 2.500" Dia x 3.750" L nominal (tolerance within manufacturing standards)
• Breaking Capacity: 200kA minimum at rated voltage

The KLLU700.X manufactured by Littelfuse Inc. satisfies all substitution criteria for AC applications at 600VAC. Additional DC voltage capability (300VDC) and enhanced breaking capacity for DC (20kA) represent extended functionality beyond the base KLU-700 specification and do not preclude substitution for AC-only applications.

Parameter Comparison

Engineering Selection Recommendations

Both the KLU-700 and KLLU700.X maintain active product status with full regulatory compliance (CE, CSA, UL certifications). Selection between these components should be based on:

• Supply availability and lead time requirements
• Packaging format preference (Bulk vs. Box)
• RoHS compliance level requirements (RoHS Compliant vs. ROHS3 Compliant)
• DC voltage capability needs (KLLU700.X provides 300VDC rating; KLU-700 is AC-rated)

For applications requiring only 600VAC operation, either component provides equivalent electrical and mechanical performance. The KLLU700.X offers extended functionality through dual AC/DC voltage rating and represents a direct substitute without performance degradation.

Frequently Asked Questions (FAQ)

Q: Can KLLU700.X replace KLU-700 in existing installations?

A: Yes. The KLLU700.X meets all critical electrical parameters (700A, 600VAC, L-class, slow-blow response) and physical dimensions required for direct substitution in bolt-mount applications. Dimensional tolerance (3.752" vs. 3.750" length) is within standard manufacturing variation.

Q: What is the difference between KLU-700 and KLLU700.X?

A: Both components are electrically equivalent at 700A 600VAC. The KLLU700.X provides additional 300VDC capability and enhanced DC breaking capacity (20kA). For AC-only circuits, this additional rating does not affect performance or compatibility.

Q: Are there packaging differences between these parts?

A: Yes. KLU-700 is supplied in Bulk packaging, while KLLU700.X is supplied in Box packaging. This affects inventory management and handling but does not impact electrical or mechanical compatibility.

Q: Do both parts carry the same regulatory certifications?

A: Yes. Both KLU-700 and KLLU700.X carry CE, CSA, and UL approvals, confirming compliance with applicable safety and performance standards.

Q: Which part should I select for new designs?

A: Selection depends on application requirements. For 600VAC-only circuits, either part is suitable. If future DC voltage capability or dual-voltage flexibility is anticipated, KLLU700.X provides extended functionality. Both maintain active product status and full regulatory compliance.