Equivalent & Substitute Parts for 3ABP 7 Ceramic Fuse

Part Overview

The 3ABP 7 is a 7 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG package format (1/4" x 1-1/4" axial). This fuse is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible protection devices. The fast-blow response characteristic and ceramic construction provide reliable overcurrent protection in industrial and commercial applications.

Substiute Parts

3ABP 7

Bel Fuse Inc.In Stock: 9613ABP 7 Datasheet

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0324007.HXP

Littelfuse Inc.In Stock: 10230324007.HXP Datasheet

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0324007.MXP

Littelfuse Inc.In Stock: 18600324007.MXP Datasheet

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0324007.VXP

Littelfuse Inc.In Stock: 10760324007.VXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3ABP 7 is determined by strict equivalence across the following critical parameters:

• Current Rating: 7 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)

All three substitute parts—0324007.HXP, 0324007.MXP, and 0324007.VXP—manufactured by Littelfuse Inc., meet these core substitution criteria. These parts are functionally equivalent for applications requiring 7 A protection at 250 V AC in the specified package format. The substitute parts offer additional DC voltage rating (125 V DC) and enhanced breaking capacity, which do not preclude their use as direct replacements in AC-only applications.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0324007.HXP, 0324007.MXP, 0324007.VXP) are functionally equivalent to the obsolete 3ABP 7 for AC applications at 250 V, 7 A. Selection among these three options should be based on the following factors:

Product Status & Compliance: All substitute parts carry active product status and ROHS3 compliance, addressing the obsolescence and RoHS non-compliance limitations of the original 3ABP 7. All three maintain the required certifications (CE, CSA, PSE, UL) with additional regional approvals.

Inventory Availability: 0324007.MXP offers the highest inventory level (1,800 pcs), followed by 0324007.HXP (961 pcs) and 0324007.VXP (1,042 pcs). Inventory considerations may influence selection for high-volume applications.

Dimensional Tolerance: Substitute parts exhibit minor dimensional variations (0.275" Dia x 1.288" L vs. 0.272" Dia x 1.280" L for the original). These variations remain within standard mechanical tolerances for 3AB/3AG package specifications and do not affect functional compatibility in standard fuse holders.

Electrical Performance: Substitute parts provide enhanced breaking capacity (750 A AC vs. 200 A) and lower melting I²t values (71 vs. 141), indicating faster response characteristics. These improvements do not compromise backward compatibility in existing circuits designed for the 3ABP 7.

Frequently Asked Questions (FAQ)

Q: Can 0324007.HXP, 0324007.MXP, and 0324007.VXP be used interchangeably as substitutes for the 3ABP 7?

A: Yes. All three Littelfuse parts meet the core substitution criteria: 7 A current rating, 250 V AC voltage rating, fast-blow response, 3AB/3AG package format, and through-hole mounting. They are electrically and mechanically equivalent for this application.

Q: What is the significance of the 125 V DC rating on the substitute parts?

A: The substitute parts include a 125 V DC rating, whereas the original 3ABP 7 specifies only AC voltage. This additional rating does not affect AC-only applications and provides expanded functionality for circuits requiring dual AC/DC protection capability.

Q: Are there dimensional differences between the 3ABP 7 and the substitute parts?

A: Minor dimensional variations exist: the original measures 0.272" Dia x 1.280" L (6.90mm x 32.50mm), while substitutes measure 0.275" Dia x 1.288" L (6.99mm x 32.72mm). These differences fall within standard mechanical tolerances for 3AB/3AG fuse holders and do not affect physical compatibility.

Q: Why do the substitute parts have lower melting I²t values?

A: The substitute parts exhibit melting I²t of 71 compared to 141 for the original 3ABP 7. This indicates a faster thermal response, which provides improved protection characteristics without affecting compatibility in circuits designed for 7 A fast-blow protection.

Q: Are the substitute parts RoHS compliant?

A: Yes. All three substitute parts (0324007.HXP, 0324007.MXP, 0324007.VXP) are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete 3ABP 7.

Q: What certifications do the substitute parts carry?

A: All substitute parts maintain CE, CSA, PSE, and UL certifications. Additionally, 0324007.HXP and 0324007.MXP include K-MARK approval, while 0324007.VXP includes KC approval, providing broader regional compliance coverage.