Equivalent & Substitute Parts for 3AP 4.6 Glass Fuse

Part Overview

The 3AP 4.6 is a 4.6 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in the 3AB/3AG form factor with 1/4" x 1-1/4" axial dimensions. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and new design implementations. Substitute parts must maintain electrical performance characteristics and mechanical compatibility with the original specification.

Substiute Parts

3AP 3.5

Bel Fuse Inc.In Stock: 12283AP 3.5 Datasheet

Current PartRFQ

BK/AGC-V-3-1/2

Eaton - Electronics DivisionIn Stock: 1182BK/AGC-V-3-1/2 Datasheet

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BK/AGC-V-3-1/2R

Eaton - Electronics DivisionIn Stock: 965BK/AGC-V-3-1/2R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3AP 4.6 is determined by the following critical parameters:

• Current Rating: 4.6 A (exact match required)
• Voltage Rating: 250 V AC minimum
• Fuse Type: Cartridge, Glass
• Package / Case: 3AB, 3AG form factor
• Mounting Type: Through Hole
• Response Time: Fast Blow characteristic
• Physical Dimensions: Compatible with 1/4" x 1-1/4" (Axial) envelope

Substitute parts must satisfy all electrical parameters and maintain mechanical compatibility with existing through-hole mounting infrastructure. Dimensional tolerance and form factor adherence ensure direct replacement capability without circuit board redesign.

Parameter Comparison

Engineering Selection Recommendations

Both Eaton substitute parts (BK/AGC-V-3-1/2 and BK/AGC-V-3-1/2R) are classified as active products, providing long-term availability compared to the obsolete 3AP 4.6. Both maintain identical current rating (4.6 A) and form factor (3AB, 3AG) specifications.

BK/AGC-V-3-1/2R is the preferred substitute due to complete dimensional specification alignment (0.266" Dia x 1.292" L versus original 0.272" Dia x 1.280" L) and explicit through-hole mounting confirmation. Dimensional variance is within typical manufacturing tolerance for glass cartridge fuses and does not affect mechanical fit in standard 3AG fuse holders.

BK/AGC-V-3-1/2 remains a valid alternative where detailed specifications are not fully documented but current rating and form factor match the original requirement.

Both substitutes share identical regulatory classification (EAR99, HTSUS 8536.10.0020) and RoHS non-compliance status with the original part.

Frequently Asked Questions (FAQ)

Q: Can BK/AGC-V-3-1/2R directly replace 3AP 4.6 in existing applications?

A: Yes. Both parts are 4.6 A, 250 V AC/DC fast-blow glass cartridge fuses in the 3AB/3AG form factor. Dimensional differences (0.266" Dia x 1.292" L versus 0.272" Dia x 1.280" L) are within standard tolerance for through-hole 3AG fuse holders and do not affect mechanical compatibility.

Q: What is the difference between BK/AGC-V-3-1/2 and BK/AGC-V-3-1/2R?

A: Both are 4.6 A glass cartridge fuses from Eaton. BK/AGC-V-3-1/2R includes complete dimensional specification and explicit through-hole mounting confirmation. BK/AGC-V-3-1/2 has limited specification detail but identical electrical ratings. BK/AGC-V-3-1/2R is recommended for new designs.

Q: Are there voltage rating differences between the original and substitutes?

A: The original 3AP 4.6 specifies 250 V AC. Eaton substitute specifications do not explicitly state voltage rating in the provided data. Confirmation of 250 V AC rating for BK/AGC-V-3-1/2 and BK/AGC-V-3-1/2R should be obtained from Eaton technical documentation before final selection.

Q: Do the substitutes maintain the same response time characteristic?

A: The original 3AP 4.6 is specified as fast-blow. Response time classification for Eaton substitutes is not provided in the available data. Verification of fast-blow characteristic should be confirmed with Eaton technical specifications.

Q: What is the impact of RoHS non-compliance on part selection?

A: All three parts (original and substitutes) are RoHS non-compliant. This status does not affect substitution eligibility but must be considered in applications subject to RoHS regulatory requirements.