Equivalent & Substitute Parts for 3AP 2-R Glass Cartridge Fuse

Part Overview

The 3AP 2-R is a 2 A, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG package format. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and procurement.

Substiute Parts

3AP 2-R

Bel Fuse Inc.In Stock: 8323AP 2-R Datasheet

Current PartRFQ

0318002.HXP

Littelfuse Inc.In Stock: 7650318002.HXP Datasheet

SimilarRFQ

0318002.MXP

Littelfuse Inc.In Stock: 9600318002.MXP Datasheet

SimilarRFQ

0318002.VXP

Littelfuse Inc.In Stock: 7160318002.VXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3AP 2-R are qualified based on the following mandatory parameters:

• Current Rating: 2 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (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)
• RoHS Status: ROHS3 Compliant (exact match required)

All three substitute parts from Littelfuse Inc. (0318002.HXP, 0318002.MXP, 0318002.VXP) meet these criteria and are classified as active products.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse 318 series alternatives (0318002.HXP, 0318002.MXP, 0318002.VXP) are direct functional equivalents to the obsolete 3AP 2-R. Selection among these active alternatives is based on procurement availability and packaging requirements:

• 0318002.MXP: 948 Pcs in stock (highest availability)
• 0318002.HXP: 712 Pcs in stock
• 0318002.VXP: 653 Pcs in stock

All substitute parts carry expanded regulatory approvals (CE, CSA, KC, PSE, UL) compared to the original part, providing enhanced compliance coverage for international applications.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0318002 series parts directly replace the Bel Fuse 3AP 2-R?

A: Yes. All three Littelfuse variants (0318002.HXP, 0318002.MXP, 0318002.VXP) meet the mandatory electrical and mechanical specifications: 2 A current rating, 250 V AC voltage rating, fast-blow response, 3AB/3AG package format, and through-hole mounting. Physical dimensions are equivalent within tolerance.

Q: What is the difference between 0318002.HXP, 0318002.MXP, and 0318002.VXP?

A: These part numbers represent different packaging or tape/reel configurations within the Littelfuse 318 series. All three are electrically and mechanically identical and interchangeable for through-hole applications.

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

A: The substitute parts carry additional regulatory approvals (KC, PSE) beyond the original part's certifications. This provides broader compliance for global applications without reducing compatibility.

Q: What are the dimensional tolerances for the 3AB/3AG package?

A: The original part specifies 0.272" Dia x 1.280" L (6.90mm x 32.50mm). Substitute parts specify 0.275" Dia x 1.288" L (6.99mm x 32.72mm). These dimensions are within standard 3AB/3AG package tolerances and are mechanically compatible with existing through-hole footprints.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. All parts are rated for 250 V AC/DC operation and are suitable for both circuit types within the specified voltage and current limits.