3ABP 8-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 3ABP 8-R is an 8A 250VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG form factor applications. This part is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs. The fuse provides fast-blow protection with a breaking capacity of 200A at rated voltage and operates across a temperature range of -55°C to 125°C.

Substiute Parts

3ABP 8-R

Bel Fuse Inc.In Stock: 7293ABP 8-R Datasheet

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0324008.HXP

Littelfuse Inc.In Stock: 8510324008.HXP Datasheet

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0324008.MXP

Littelfuse Inc.In Stock: 41750324008.MXP Datasheet

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0324008.VXP

Littelfuse Inc.In Stock: 9760324008.VXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3ABP 8-R is determined by the following critical parameters:

• Current Rating: 8 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)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

All three substitute parts from Littelfuse Inc. (0324008.HXP, 0324008.MXP, 0324008.VXP) meet these core substitution criteria. These parts are active products with enhanced specifications including DC voltage ratings and higher breaking capacities, providing improved performance margins while maintaining mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The three Littelfuse 324 series substitutes (0324008.HXP, 0324008.MXP, 0324008.VXP) are direct functional replacements for the obsolete 3ABP 8-R. All three parts maintain active product status, ensuring long-term availability and supply chain continuity.

Certification coverage differs slightly across the substitute options:

• 0324008.HXP: CE, CSA, K-MARK, PSE, UL
• 0324008.MXP: CE, CSA, K-MARK, PSE, UL
• 0324008.VXP: CE, CSA, KC, PSE, UL

All substitutes carry ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original part. The Littelfuse parts provide enhanced breaking capacity (750A AC, 10kA DC versus 200A) and include DC voltage ratings (125V DC), offering improved performance margins for applications requiring dual AC/DC operation.

Frequently Asked Questions (FAQ)

Q: Can 0324008.HXP, 0324008.MXP, and 0324008.VXP be used interchangeably with the 3ABP 8-R?

A: Yes. All three Littelfuse parts meet the core substitution criteria: 8A current rating, 250V AC voltage rating, 3AB/3AG form factor, fast-blow response, through-hole mounting, and -55°C to 125°C operating temperature range. Mechanical fit and electrical performance are compatible.

Q: What is the difference between the three Littelfuse substitute options?

A: The three parts (0324008.HXP, 0324008.MXP, 0324008.VXP) are electrically and mechanically identical. The primary difference is certification coverage: 0324008.VXP includes KC certification in place of K-MARK. Selection should be based on regional regulatory requirements for your application.

Q: Are there dimensional differences between the original and substitute parts?

A: Minor dimensional variations exist. The 3ABP 8-R measures 0.272" diameter x 1.280" length, while the Littelfuse substitutes measure 0.275" diameter x 1.288" length. These differences fall within standard mechanical tolerances for 3AB/3AG form factor cartridge fuses and do not affect mounting or performance in standard through-hole applications.

Q: What is the significance of the melting I²t difference?

A: The original 3ABP 8-R has a melting I²t of 184, while the Littelfuse substitutes have 105. Lower I²t values indicate faster thermal response. The Littelfuse parts will interrupt fault currents more quickly, providing enhanced protection characteristics while maintaining the same 8A nominal current rating.

Q: Can these fuses be used in DC applications?

A: The original 3ABP 8-R is rated for AC only. The Littelfuse substitutes include a 125V DC rating, enabling use in dual AC/DC circuits. If your application is AC-only, this additional capability does not affect compatibility or performance.

Q: Which substitute should I select for new designs?

A: For new designs, any of the three Littelfuse parts (0324008.HXP, 0324008.MXP, 0324008.VXP) are suitable. 0324008.MXP has the highest inventory availability (4100 pcs), making it the preferred choice for volume production. Select based on regional certification requirements if your application has specific geographic compliance needs.