3ABP 500-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The 3ABP 500-R is a 500 mA ceramic cartridge fuse manufactured by Bel Fuse Inc., rated for 250 V AC operation in a 3AB, 3AG form factor (1/4" x 1-1/4" axial). This product is currently obsolete, making equivalent substitutes necessary for ongoing maintenance and repair applications. The fuse is designed for fast-blow response in through-hole mounting configurations and carries CE, CSA, and cURus approvals.

Substiute Parts

3ABP 500-R

Bel Fuse Inc.In Stock: 11763ABP 500-R Datasheet

Current PartRFQ

0324.500HXP

Littelfuse Inc.In Stock: 11120324.500HXP Datasheet

DirectRFQ

0324.500MXP

Littelfuse Inc.In Stock: 11520324.500MXP Datasheet

DirectRFQ

0324.500VXP

Littelfuse Inc.In Stock: 10760324.500VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3ABP 500-R is determined by strict equivalence across the following parameters: current rating (500 mA), AC voltage rating (250 V), fuse type (ceramic cartridge), package form factor (3AB, 3AG, 1/4" x 1-1/4"), response time (fast blow), and mounting configuration (through hole). The substitute parts listed—0324.500HXP, 0324.500MXP, and 0324.500VXP—all manufactured by Littelfuse Inc.—meet these core electrical and mechanical requirements. These substitutes are active products with current manufacturing status, providing reliable alternatives to the obsolete 3ABP 500-R.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitutes (0324.500HXP, 0324.500MXP, 0324.500VXP) are active products with current manufacturing support, providing direct replacements for the obsolete 3ABP 500-R. The substitutes carry CE, CSA, and UL certifications, meeting the regulatory requirements of the original part. The Littelfuse parts offer enhanced DC voltage rating (125 V) and improved DC breaking capacity (10kA) compared to the original specification, making them suitable for applications requiring both AC and DC operation. All parts maintain ROHS3 compliance and identical operating temperature ranges. Selection among the three Littelfuse variants should be based on specific application requirements and packaging preferences, as they are electrically and mechanically equivalent.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0324.500HXP, 0324.500MXP, or 0324.500VXP directly replace the 3ABP 500-R?

A: Yes. All three Littelfuse parts are direct substitutes. They share identical current ratings (500 mA), AC voltage ratings (250 V), fuse type (ceramic cartridge), package form factor (3AB, 3AG, 1/4" x 1-1/4"), response time (fast blow), and operating temperature range (-55°C ~ 125°C). Physical dimensions are equivalent, enabling direct mounting in existing through-hole applications.

Q: What are the differences between the three Littelfuse substitute parts?

A: The 0324.500HXP, 0324.500MXP, and 0324.500VXP are electrically and mechanically identical. All three are manufactured by Littelfuse in the 324 series with identical electrical specifications. Differences, if any, relate to packaging or internal manufacturing variants not specified in the provided data.

Q: Does the DC voltage rating of the Littelfuse substitutes affect AC-only applications?

A: No. For AC-only applications operating at 250 V AC, the additional DC voltage rating (125 V) of the Littelfuse substitutes does not impact performance. The AC voltage rating remains the controlling parameter for AC circuit protection.

Q: Are the Littelfuse substitutes certified for the same regulatory standards?

A: The Littelfuse substitutes carry CE, CSA, and UL certifications. The original 3ABP 500-R carries CE, CSA, and cURus certifications. Both certification sets meet industrial safety requirements. Applications requiring specific certification should confirm compatibility with system requirements.

Q: What is the significance of the melting I²t difference between the original and substitutes?

A: The original 3ABP 500-R has a melting I²t of 0.14, while the Littelfuse substitutes have 0.115. This indicates the substitutes respond slightly faster to overcurrent conditions. For applications with precise thermal coordination requirements, this difference should be evaluated against circuit protection coordination curves.