Equivalent & Substitute Parts for 3AB 8 Ceramic Fuse

Part Overview

The 3AB 8 is an 8A 250VAC ceramic cartridge fuse manufactured by Bel Fuse Inc. in the 3AB series. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system maintenance and component replacement. The fuse is designed for fast-blow response in applications requiring 250V AC/DC protection with a 1/4" x 1-1/4" form factor. Substitute parts must maintain electrical equivalence across current rating, voltage rating, response time, and physical dimensions to ensure proper circuit protection without modification to existing fuse holders.

Substiute Parts

3AB 8

Bel Fuse Inc.In Stock: 10803AB 8 Datasheet

Current PartRFQ

3AB 8-R

Bel Fuse Inc.In Stock: 16773AB 8-R Datasheet

DirectRFQ

0001.1013

SCHURTER Inc.In Stock: 43750001.1013 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3AB 8 ceramic fuse is determined by strict equivalence in the following parameters:

• Current Rating: 8 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

Two substitute categories are identified:

Direct Substitutes (Same Form Factor): Parts maintaining the 3AB, 3AG, 1/4" x 1-1/4" package specification. These provide drop-in replacement capability without holder modification.

Functional Equivalents (Different Form Factor): Parts meeting all electrical parameters but utilizing different physical dimensions (5mm x 20mm). These require compatible holder hardware and are suitable for new designs or systems with multi-holder capability.

Parameter Comparison

Engineering Selection Recommendations

3AB 8-R (Bel Fuse Inc.): This is the primary substitute for the obsolete 3AB 8. It maintains identical electrical specifications, form factor, and breaking capacity. The 3AB 8-R is active in production with ROHS3 compliance and expanded certification coverage (cURus added). This part provides direct compatibility with existing 3AB/3AG fuse holders without any system modification. Inventory availability is higher than the main part (1587 pcs vs. 983 pcs).

0001.1013 (SCHURTER Inc.): This part meets all electrical requirements (8A, 250V AC, Fast Blow, ceramic cartridge) and operates within the same temperature range. However, the 5mm x 20mm form factor differs from the 3AB/3AG specification, requiring a compatible holder. The 0001.1013 offers higher breaking capacity (1.5kA vs. 200A) and lower melting I²t (81.9 vs. 184), making it suitable for applications where enhanced fault tolerance is beneficial. This option is appropriate for new designs or retrofit applications where holder compatibility can be verified. ROHS3 compliance and broader international certifications (KC, VDE, PSE/JET) support global deployment.

Frequently Asked Questions (FAQ)

Q: Can the 3AB 8-R directly replace the obsolete 3AB 8 without any modifications?

A: Yes. The 3AB 8-R maintains identical electrical specifications (8A, 250V AC, Fast Blow), form factor (1/4" x 1-1/4"), and breaking capacity (200A). It is compatible with all existing 3AB and 3AG fuse holders without modification.

Q: What is the difference between the 3AB 8-R and the 0001.1013 substitute?

A: Both parts are electrically equivalent at 8A, 250V AC with fast-blow response. The 3AB 8-R uses the 3AB/3AG form factor (1/4" x 1-1/4"), while the 0001.1013 uses a 5mm x 20mm form factor. The 0001.1013 requires a compatible 5x20mm fuse holder and offers higher breaking capacity (1.5kA vs. 200A).

Q: Is the 0001.1013 suitable for direct replacement in existing systems?

A: The 0001.1013 is electrically equivalent but physically incompatible with 3AB/3AG holders due to its 5mm x 20mm dimensions. It is suitable only for systems with compatible 5x20mm holders or for new designs where holder selection can be specified.

Q: What compliance advantages do the substitute parts offer?

A: Both 3AB 8-R and 0001.1013 are ROHS3 compliant, whereas the original 3AB 8 is RoHS non-compliant. The 3AB 8-R maintains the original certification set (CE, CSA, PSE, UL) with the addition of cURus. The 0001.1013 provides broader international certifications including KC, VDE, and PSE/JET, supporting deployment in additional markets.

Q: Are there inventory considerations for selecting a substitute?

A: The 3AB 8-R has higher current inventory (1587 pcs) compared to the original 3AB 8 (983 pcs), supporting immediate availability for replacement applications. The 0001.1013 has the highest inventory level (4319 pcs), providing extended supply assurance for high-volume requirements.