KRP-C-650SP Equivalent & Substitute Parts

Part Overview

The KRP-C-650SP is a 650A cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 600 VAC and 300 VDC operation. This LOW-PEAK™ KRP-C series fuse is designed for bolt mount applications in electrical and industrial systems requiring slow blow response characteristics. The part is currently active in production with 756 units in stock. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility exist, enabling system designers to source alternative components from qualified manufacturers while maintaining circuit protection performance.

Substiute Parts

KRP-C-650SP

Eaton - Bussmann Electrical DivisionIn Stock: 865KRP-C-650SP Datasheet

Current PartRFQ

KLPC650.X

Littelfuse Inc.In Stock: 882KLPC650.X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KRP-C-650SP is determined by the following critical parameters:

• Current Rating: Must be 650A
• AC Voltage Rating: Must be 600 VAC minimum
• Fuse Type: Must be Cartridge with Slow Blow response
• Mounting Type: Must be Bolt Mount with compatible blade terminal configuration
• Physical Dimensions: Must be compatible with 2.500" Dia x 3.750" L envelope
• Class: Must be Class L
• Approval Certifications: Must include CE, CSA, and UL certifications

The KLPC650.X from Littelfuse Inc. meets these substitution criteria. While the DC voltage rating differs (480 VDC versus 300 VDC), this represents an enhanced capability that does not restrict application in 300 VDC circuits. The breaking capacity specifications differ between the two parts; however, both are rated for industrial and electrical applications with appropriate fault current handling.

Parameter Comparison

Engineering Selection Recommendations

Both the KRP-C-650SP and KLPC650.X are active production components with full CE, CSA, and UL certifications, meeting regulatory requirements for industrial and electrical applications. The KRP-C-650SP is the primary specification component. The KLPC650.X serves as a qualified substitute when supply constraints or procurement requirements necessitate an alternative source.

Selection between these parts should be based on:

• Availability: The KLPC650.X currently has 809 units in stock versus 756 units for the KRP-C-650SP
• Regulatory Compliance: Both parts meet identical certification standards (CE, CSA, UL)
• Environmental Requirements: The KLPC650.X carries ROHS3 compliance and REACH Unaffected status, providing enhanced environmental documentation
• DC Voltage Margin: The KLPC650.X provides 480 VDC rating versus the specified 300 VDC requirement, offering additional operational margin in DC circuits
• Packaging: The KRP-C-650SP is supplied in bulk packaging; the KLPC650.X is supplied in box packaging

Physical dimensions are equivalent within manufacturing tolerance (0.002" difference in length).

Frequently Asked Questions (FAQ)

Q: Can the KLPC650.X replace the KRP-C-650SP in all applications?

A: Yes, for applications operating at or below 600 VAC and 300 VDC. The KLPC650.X is rated for 480 VDC, which exceeds the specified 300 VDC requirement. Both parts are Class L cartridge fuses with identical 650A current ratings, slow blow response, and bolt mount configuration.

Q: What is the significance of the different breaking capacity ratings?

A: The KRP-C-650SP is rated 300kA AC and 100kA DC. The KLPC650.X is rated 200kA AC and 300kA DC. Both ratings are appropriate for industrial electrical systems. The application circuit design must verify that the selected fuse breaking capacity meets or exceeds the maximum available fault current at the installation point.

Q: Are the physical dimensions identical?

A: Dimensions are equivalent within manufacturing tolerance. The KRP-C-650SP is 2.500" Dia x 3.750" L; the KLPC650.X is 2.500" Dia x 3.752" L. The 0.002" length difference is within standard mechanical tolerance for bolt mount cartridge fuses and does not affect mechanical fit or electrical performance.

Q: What packaging differences exist between these parts?

A: The KRP-C-650SP is supplied in bulk packaging. The KLPC650.X is supplied in box packaging. Packaging selection may affect inventory management and handling procedures but does not impact electrical or mechanical compatibility.

Q: Do both parts meet the same regulatory certifications?

A: Yes. Both the KRP-C-650SP and KLPC650.X carry CE, CSA, and UL certifications. The KLPC650.X additionally carries ROHS3 compliance and REACH Unaffected status, providing enhanced environmental compliance documentation.

Q: Which part should be specified for new designs?

A: The KRP-C-650SP is the primary specification component as the Eaton - Bussmann LOW-PEAK™ KRP-C series fuse. The KLPC650.X should be specified as an approved substitute only when supply, procurement, or environmental compliance requirements necessitate an alternative source.