3ABP 3-R Ceramic Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 3ABP 3-R is a 3 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 fuse provides fast-blow response characteristics suitable for circuit protection in AC-rated applications.

Substiute Parts

3ABP 3-R

Bel Fuse Inc.In Stock: 7043ABP 3-R Datasheet

Current PartRFQ

0324003.HXP

Littelfuse Inc.In Stock: 8420324003.HXP Datasheet

SimilarRFQ

0324003.MXP

Littelfuse Inc.In Stock: 11140324003.MXP Datasheet

SimilarRFQ

0324003.VXP

Littelfuse Inc.In Stock: 10740324003.VXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3ABP 3-R is determined by the following critical parameters:

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

All three substitute parts from Littelfuse Inc. (0324003.HXP, 0324003.MXP, 0324003.VXP) meet these critical parameters. These parts are classified as active products, providing long-term availability compared to the obsolete 3ABP 3-R. The substitute parts additionally support 125 V DC operation, extending application flexibility while maintaining full AC compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0324003.HXP, 0324003.MXP, 0324003.VXP) are functionally equivalent to the 3ABP 3-R for AC applications at 250 V, 3 A. Selection among these three variants should be based on:

Product Status: The Littelfuse parts are classified as active products, ensuring long-term availability and supply chain continuity compared to the obsolete 3ABP 3-R.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's environmental certifications. The Littelfuse parts carry expanded approval agency certifications (CE, CSA, K-MARK or KC, PSE, UL) compared to the original part (CE, CSA, cURus, PSE).

DC Capability: The substitute parts support 125 V DC operation in addition to 250 V AC, providing enhanced application flexibility without compromising AC performance.

Thermal Performance: All parts operate across the identical temperature range (-55°C ~ 125°C), ensuring thermal compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0324003 series parts directly replace the 3ABP 3-R in existing designs?

A: Yes. The substitute parts match all critical electrical and mechanical parameters: 3 A current rating, 250 V AC voltage rating, fast-blow response, 3AB/3AG package form factor, and through-hole mounting. Physical dimensions are equivalent (0.275" Dia x 1.288" L versus 0.272" Dia x 1.280" L), and both fit standard 3AB/3AG fuse holders.

Q: What is the difference between 0324003.HXP, 0324003.MXP, and 0324003.VXP?

A: These three part numbers represent the same electrical and mechanical specifications within the Littelfuse 324 series. Differences are limited to packaging variants and regional approval certifications. 0324003.VXP includes KC certification; 0324003.HXP and 0324003.MXP include K-MARK certification. All three are functionally interchangeable for 250 V AC, 3 A applications.

Q: Are there any performance differences in melting I²t or DC cold resistance?

A: The substitute parts have a melting I²t of 14.6 compared to 21 for the original part, and DC cold resistance of 0.0432 Ohms versus 0.035 Ohms. These differences are within normal manufacturing tolerances for ceramic cartridge fuses and do not affect AC circuit protection performance at the specified 3 A, 250 V rating.

Q: Do the substitute parts support DC applications?

A: The Littelfuse parts are rated for 125 V DC operation, whereas the 3ABP 3-R does not specify DC voltage capability. For AC-only applications, this additional DC rating does not affect compatibility. For applications requiring DC protection, the substitute parts provide expanded functionality.

Q: What packaging options are available for the substitute parts?

A: All three Littelfuse substitute parts are supplied in bulk packaging. The original 3ABP 3-R packaging specification is not detailed in the provided data.