KLU-800 Equivalent & Substitute Parts Reference

Part Overview

The KLU-800 is an 800A 600VAC cylindrical cartridge fuse manufactured by Eaton - Bussmann Electrical Division, part of the Limitron™ KLU series. This slow-blow fuse cartridge is designed for bolt mount applications in electrical and industrial systems. The product is currently active with 1022 units in stock. Substitute parts may be required due to supply availability, regional sourcing preferences, or specific voltage rating requirements for DC applications.

Substiute Parts

KLU-800

Eaton - Bussmann Electrical DivisionIn Stock: 1080KLU-800 Datasheet

Current PartRFQ

KLLU800.X

Littelfuse Inc.In Stock: 900KLLU800.X Datasheet

SimilarRFQ

KLPC800.X

Littelfuse Inc.In Stock: 1131KLPC800.X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KLU-800 is determined by the following critical parameters:

• Current Rating: Must be 800A
• Voltage Rating - AC: Must be 600 VAC minimum
• Fuse Type: Must be Cartridge
• Response Time: Must be Slow Blow
• Class: Must be L
• Mounting Type: Must be Bolt Mount
• Package / Case: Must be Cylindrical with Blade Terminal (Bolt)
• Physical Dimensions: Must be compatible with 2.500" Dia x 3.750" L envelope
• Approval Agencies: Must include CE, CSA, and UL certifications

The two substitute parts listed below meet all mandatory electrical and mechanical parameters for direct substitution in 600 VAC applications. Additional DC voltage ratings in substitute parts do not restrict their use in AC-only circuits.

Parameter Comparison

Engineering Selection Recommendations

Both KLLU800.X and KLPC800.X are qualified substitutes for the KLU-800 in 600 VAC applications. Selection between these options depends on system requirements:

KLLU800.X (Littelfuse POWR-GARD® KLLU series) is suitable for applications requiring both AC and DC voltage ratings up to 300 VDC. This part maintains full compliance with CE, CSA, and UL certifications and is ROHS3 compliant.

KLPC800.X (Littelfuse POWR-GARD® and POWR-PRO® KLPC series) is suitable for applications requiring both AC and DC voltage ratings up to 480 VDC. This part also maintains full compliance with CE, CSA, and UL certifications and is ROHS3 compliant. The higher DC breaking capacity (300kA DC) provides additional margin in mixed-voltage systems.

All three parts are active products with current manufacturing status and full regulatory approvals. Physical dimensions are compatible within tolerance (length variation of 0.002" is within standard manufacturing specifications for cylindrical cartridge fuses).

Frequently Asked Questions (FAQ)

Q: Can KLLU800.X or KLPC800.X be used as direct replacements for KLU-800 in existing 600 VAC circuits?

A: Yes. Both substitute parts meet all mandatory electrical parameters: 800A current rating, 600 VAC voltage rating, slow-blow response, Class L designation, bolt mount configuration, and cylindrical blade terminal package. Physical dimensions are compatible. All three parts carry identical regulatory approvals (CE, CSA, UL).

Q: What is the difference between KLLU800.X and KLPC800.X?

A: Both are 800A 600 VAC cartridge fuses with identical AC ratings and mechanical specifications. The primary difference is DC voltage rating: KLLU800.X is rated 300 VDC with 20kA DC breaking capacity, while KLPC800.X is rated 480 VDC with 300kA DC breaking capacity. For AC-only applications, either part is functionally equivalent.

Q: Are there packaging differences between these parts?

A: KLU-800 is supplied in bulk packaging, while both KLLU800.X and KLPC800.X are supplied in box packaging. The fuse cartridges themselves are identical in form factor and mounting interface.

Q: Do the substitute parts meet the same compliance standards as the original?

A: Yes. All three parts carry CE, CSA, and UL certifications. KLLU800.X and KLPC800.X are ROHS3 compliant, while KLU-800 is RoHS compliant. Both compliance levels are acceptable for equivalent substitution.

Q: Are there any dimensional incompatibilities?

A: No. All three parts use the same 2.500" diameter cylindrical case with blade terminal bolt mount. Length specifications are 3.750" (KLU-800) and 3.752" (both Littelfuse parts), a 0.002" variation within standard manufacturing tolerance for this product category.