Equivalent & Substitute Parts for 3ABP 1 Ceramic Fuse

Part Overview

The 3ABP 1 is a 1 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc. in the 3AB/3AG form factor. This product is classified as obsolete, making substitute parts necessary for ongoing system maintenance and new designs. The 3ABP 1 features fast-blow response characteristics and is approved by CE, CSA, PSE, and UL standards. Equivalent alternatives from Littelfuse Inc. provide active product status with enhanced specifications while maintaining mechanical and electrical compatibility.

Substiute Parts

3ABP 1

Bel Fuse Inc.In Stock: 7563ABP 1 Datasheet

Current PartRFQ

0324001.HXP

Littelfuse Inc.In Stock: 12880324001.HXP Datasheet

DirectRFQ

0324001.MXP

Littelfuse Inc.In Stock: 11470324001.MXP Datasheet

DirectRFQ

0324001.VXP

Littelfuse Inc.In Stock: 10630324001.VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The three Littelfuse substitute parts (0324001.HXP, 0324001.MXP, 0324001.VXP) are functionally equivalent to the 3ABP 1 based on the following critical parameters:

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

All substitute parts are manufactured by Littelfuse Inc. and carry active product status. The Littelfuse parts provide additional DC voltage rating (125 V DC) not specified in the original 3ABP 1 datasheet, and offer improved breaking capacity and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0324001.HXP, 0324001.MXP, 0324001.VXP) are direct functional equivalents for the obsolete 3ABP 1. Selection among the three Littelfuse variants may be based on packaging availability and inventory requirements, as they share identical electrical and mechanical specifications.

The Littelfuse substitutes offer the following advantages over the original 3ABP 1:

• Active product status ensures long-term availability and supply chain continuity
• RoHS3 compliance meets current environmental and regulatory requirements
• Enhanced breaking capacity (100 A AC, 10 kA DC versus 35 A) provides superior fault protection
• Improved DC voltage rating (125 V DC) extends application flexibility
• Identical form factor and mounting type ensure direct mechanical compatibility

All substitute parts maintain the same approval certifications (CE, CSA, PSE, UL) and operating temperature range as the original part.

Frequently Asked Questions (FAQ)

Q: Are the Littelfuse 0324001 series parts direct drop-in replacements for the 3ABP 1?

A: Yes. The substitute parts share identical current rating (1 A), AC voltage rating (250 V), fuse type (ceramic cartridge), package designation (3AB, 3AG), response time (fast blow), and mounting type (through hole). Physical dimensions are within acceptable tolerance for standard 3AB/3AG fuse holders.

Q: What is the significance of the DC voltage rating on the Littelfuse parts?

A: The Littelfuse substitutes specify 125 V DC rating, which was not documented in the original 3ABP 1 specification. This additional rating expands application compatibility for circuits operating under DC conditions without compromising AC performance.

Q: How do the melting I²t values differ, and does this affect substitution?

A: The Littelfuse parts specify 0.69 I²t compared to 1.43 I²t for the 3ABP 1. Both values fall within the fast-blow fuse category. The lower I²t value indicates faster thermal response, which is acceptable for direct substitution in circuits designed for 1 A fast-blow protection.

Q: Why should I choose an active product over the obsolete 3ABP 1?

A: Active products ensure continued manufacturing, supply availability, and technical support. The obsolete status of the 3ABP 1 creates supply risk and limits access to replacement inventory. Littelfuse substitutes provide RoHS3 compliance and enhanced specifications while maintaining full functional compatibility.

Q: Are there differences between the three Littelfuse part numbers (HXP, MXP, VXP)?

A: The three part numbers represent different packaging or distribution variants from Littelfuse Inc. All three share identical electrical specifications, mechanical dimensions, and performance characteristics. Selection should be based on packaging format and inventory availability for your application.

Q: Do the physical dimension tolerances affect mechanical fit?

A: The Littelfuse parts measure 0.275" diameter versus 0.272" for the 3ABP 1, a difference of 0.003". This variation is within standard tolerance for 3AB/3AG fuse holder specifications and does not affect mechanical compatibility or electrical performance.