A4BQ3000 Low Voltage Fuse Equivalent & Substitute Parts

Part Overview

The A4BQ3000 is a low voltage fuse manufactured by Mersen USA Newburyport-MA L.L.C., rated for 600V at 3000A. This component is classified as an L-class fuse cartridge designed for industrial and electrical applications requiring high current protection. The part is currently active in production and ROHS3 compliant. Substitute parts may be required due to inventory availability, regional sourcing preferences, or specific application requirements where alternative manufacturers' specifications align with system design parameters.

Substiute Parts

A4BQ3000

Mersen USA Newburyport-MA L.L.C.In Stock: 846A4BQ3000 Datasheet

Current PartRFQ

KLPC3000X

Littelfuse Inc.In Stock: 1014KLPC3000X Datasheet

SimilarRFQ

KRP-C-3000SP

Eaton - Bussmann Electrical DivisionIn Stock: 958KRP-C-3000SP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A4BQ3000 are qualified based on the following critical parameters:

• Current Rating: 3000A (3kA equivalent)
• Voltage Rating - AC: 600V minimum
• Fuse Class: L-class cartridge
• Response Time: Slow Blow
• Mounting Type: Bolt Mount
• Fuse Form Factor: Cylindrical with blade terminal

The identified substitutes KLPC3000X and KRP-C-3000SP meet these core electrical and mechanical requirements. Both are L-class cartridge fuses with 3kA current ratings and 600VAC voltage ratings, enabling direct functional equivalence in applications designed for the A4BQ3000.

Parameter Comparison

Engineering Selection Recommendations

All three fuses—A4BQ3000, KLPC3000X, and KRP-C-3000SP—are active production components with current regulatory compliance. The KLPC3000X and KRP-C-3000SP both carry CE, CSA, and UL approvals, meeting international safety standards. All parts are RoHS compliant, satisfying environmental regulations for industrial electrical applications.

Selection between these parts should be based on:

• Inventory availability and lead time requirements
• Specific breaking capacity requirements at rated voltage (KLPC3000X: 200kA AC / 300kA DC; KRP-C-3000SP: 300kA AC / 100kA DC)
• DC voltage rating compatibility (KLPC3000X: 480VDC; KRP-C-3000SP: 300VDC)
• Physical dimensions and mounting space constraints
• Preferred supplier relationships and regional sourcing

Frequently Asked Questions (FAQ)

Q: Can KLPC3000X and KRP-C-3000SP be used interchangeably with A4BQ3000?

A: Both substitutes meet the core electrical specifications: 3kA current rating, 600VAC voltage rating, L-class cartridge type, and slow-blow response. However, verify DC voltage requirements and breaking capacity specifications for your specific application before substitution.

Q: What is the difference in physical dimensions between the substitutes?

A: KLPC3000X measures 5.000" Dia x 4.000" L (127.00mm x 101.6mm). KRP-C-3000SP measures 5.000" Dia x 3.750" L (127.00mm x 95.25mm). Both have identical diameter but differ in length by 0.25 inches. Verify mounting space availability before selection.

Q: Are all three fuses RoHS compliant?

A: Yes. A4BQ3000 and KLPC3000X are ROHS3 compliant. KRP-C-3000SP is RoHS compliant. All meet environmental regulatory requirements for industrial applications.

Q: What certifications do the substitute parts carry?

A: Both KLPC3000X and KRP-C-3000SP carry CE, CSA, and UL approvals, meeting international safety standards for electrical components.

Q: How do the DC voltage ratings differ between substitutes?

A: KLPC3000X is rated for 480VDC. KRP-C-3000SP is rated for 300VDC. If your application requires DC operation, select the substitute matching your system voltage requirements.