3ABP 4-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 3ABP 4-R is a 4 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG form factor applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The fast-blow response characteristic and ceramic construction provide reliable overcurrent protection in industrial and commercial electrical circuits.

Substiute Parts

3ABP 4-R

Bel Fuse Inc.In Stock: 9163ABP 4-R Datasheet

Current PartRFQ

0324004.HXP

Littelfuse Inc.In Stock: 11540324004.HXP Datasheet

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0324004.MXP

Littelfuse Inc.In Stock: 44160324004.MXP Datasheet

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0324004.VXP

Littelfuse Inc.In Stock: 8050324004.VXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3ABP 4-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The three Littelfuse 324 series parts (0324004.HXP, 0324004.MXP, 0324004.VXP) meet all substitution criteria. These parts provide additional DC voltage rating capability (125 V DC) and enhanced breaking capacity, which do not compromise compatibility with applications designed for the 3ABP 4-R.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse 324 series substitutes (0324004.HXP, 0324004.MXP, 0324004.VXP) are functionally equivalent to the 3ABP 4-R and are recommended for direct replacement. The substitutes maintain active product status, ensuring long-term availability and supply chain continuity.

The Littelfuse parts carry expanded regulatory approvals (CE, CSA, K-MARK or KC, PSE, UL) compared to the original part (CE, CSA, cURus, PSE), providing broader compliance coverage for international applications. All substitute parts maintain ROHS3 compliance and REACH unaffected status.

Dimensional tolerance between the original part (0.272" Dia x 1.280" L) and substitutes (0.275" Dia x 1.288" L) is within acceptable mechanical clearance for standard 3AB/3AG fuse holders. The enhanced breaking capacity of the substitute parts (750 A AC, 10 kA DC versus 200 A) provides superior fault protection without affecting normal circuit operation.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0324004 series parts be used as direct replacements for the 3ABP 4-R?

A: Yes. All three Littelfuse variants (0324004.HXP, 0324004.MXP, 0324004.VXP) meet the critical substitution parameters: 4 A current rating, 250 V AC voltage rating, ceramic cartridge construction, fast-blow response, 3AB/3AG form factor, and through-hole mounting. Dimensional and electrical characteristics are compatible with applications designed for the 3ABP 4-R.

Q: What is the difference between the three Littelfuse substitute part numbers?

A: The three Littelfuse parts (0324004.HXP, 0324004.MXP, 0324004.VXP) are electrically and mechanically identical. Differences exist only in packaging configuration and regulatory approvals. 0324004.VXP includes KC approval; 0324004.HXP and 0324004.MXP include K-MARK approval. Selection should be based on regional compliance requirements and packaging availability.

Q: Are there any mechanical compatibility concerns with the dimensional differences?

A: Dimensional variation between the original part (0.272" Dia x 1.280" L) and substitutes (0.275" Dia x 1.288" L) is minimal and falls within standard mechanical tolerance for 3AB/3AG fuse holder applications. No mechanical modification is required for installation.

Q: Does the higher breaking capacity of the substitute parts affect circuit operation?

A: No. Breaking capacity is a fault-condition specification that defines the maximum current the fuse can safely interrupt. Higher breaking capacity does not alter normal circuit behavior or fuse response characteristics. The 4 A fast-blow rating remains unchanged.

Q: What regulatory approvals should I consider for my application?

A: The original 3ABP 4-R carries CE, CSA, cURus, and PSE approvals. Littelfuse substitutes carry CE, CSA, PSE, and UL approvals, with regional variants including K-MARK or KC. Select the substitute variant that matches your target market regulatory requirements.