Equivalent & Substitute Parts for 3AB 3 Ceramic Fuse

Part Overview

The 3AB 3 is a 3 A, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and procurement. The fuse is designed for fast-blow response and requires a compatible holder for installation. Due to its obsolete status, sourcing direct replacements from active product lines is essential for maintenance and new designs.

Substiute Parts

3AB 3

Bel Fuse Inc.In Stock: 11073AB 3 Datasheet

Current PartRFQ

3AB 3-R

Bel Fuse Inc.In Stock: 11493AB 3-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3AB 3-R serves as a direct equivalent to the 3AB 3 based on the following critical parameters:

• Current Rating: Identical at 3 A
• Voltage Rating (AC): Identical at 250 V
• Fuse Type: Identical cartridge ceramic construction
• Response Time: Identical fast-blow characteristic
• Package / Case: Identical 3AB, 3AG, 1/4" x 1-1/4" form factor
• Breaking Capacity: Identical 100 A rating
• Melting I²t: Identical value of 21
• Operating Temperature Range: Identical -55°C ~ 125°C
• DC Cold Resistance: Identical 0.035 Ohms
• Physical Dimensions: Identical 0.250" Dia x 1.252" L

The primary distinction is product status: the 3AB 3 is obsolete, while the 3AB 3-R is active. The 3AB 3-R is available in bulk packaging and maintains full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 3AB 3-R is the direct replacement for the 3AB 3. Both parts are manufactured by Bel Fuse Inc. and maintain identical electrical and mechanical specifications. The 3AB 3-R is the preferred selection due to its active product status and ROHS3 compliance, which aligns with current regulatory requirements. The 3AB 3-R carries CE, CSA, cURus, and PSE certifications, providing equivalent approval coverage to the obsolete 3AB 3. For new designs and ongoing procurement, the 3AB 3-R should be specified in place of the 3AB 3.

Frequently Asked Questions (FAQ)

Q: Can the 3AB 3-R be used as a direct replacement for the 3AB 3?

A: Yes. The 3AB 3-R is electrically and mechanically identical to the 3AB 3. Both are 3 A, 250 V AC/DC ceramic cartridge fuses with fast-blow response, identical breaking capacity, and identical physical dimensions. The 3AB 3-R is the active equivalent.

Q: What is the difference between the 3AB 3 and 3AB 3-R?

A: The primary differences are product status and compliance. The 3AB 3 is obsolete and RoHS non-compliant. The 3AB 3-R is active and ROHS3 compliant. All electrical and mechanical parameters are identical.

Q: Are there any compatibility concerns when switching from 3AB 3 to 3AB 3-R?

A: No. Both parts use the identical 3AB, 3AG, 1/4" x 1-1/4" package form factor and require the same holder. Installation and electrical performance are identical.

Q: What certifications does the 3AB 3-R carry?

A: The 3AB 3-R carries CE, CSA, cURus, and PSE certifications. These provide equivalent regulatory coverage for most applications.

Q: Is the 3AB 3-R available in different packaging options?

A: The 3AB 3-R is available in bulk packaging. The 3AB 3 was available in standard packaging. Both contain the same fuse component.