GSA 2 Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The GSA 2 is a 2 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc. with a slow-blow response characteristic. This component is classified as obsolete, requiring identification of active equivalent alternatives for continued system support and procurement. Substitute parts must maintain identical electrical ratings, mechanical form factors, and approval certifications to ensure direct interchangeability in 3AB/3AG holder applications.

Substiute Parts

GSA 2

Bel Fuse Inc.In Stock: 1015GSA 2 Datasheet

Current PartRFQ

GSA 2-R

Bel Fuse Inc.In Stock: 1758GSA 2-R Datasheet

DirectRFQ

0001.2507

SCHURTER Inc.In Stock: 103730001.2507 Datasheet

SimilarRFQ

0326002.VXP

Littelfuse Inc.In Stock: 10880326002.VXP Datasheet

SimilarRFQ

TCA-2A

OptiFuseIn Stock: 4208TCA-2A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GSA 2 are classified based on the following substitution criteria:

Direct Manufacturer Equivalent (GSA 2-R): Identical current rating (2 A), voltage rating (250 V AC), package form factor (3AB, 3AG, 1/4" x 1-1/4"), and response time (slow blow). Active product status with enhanced RoHS3 compliance and improved DC cold resistance specification.

Similar Mechanical/Electrical Equivalents (0326002.VXP, 0001.2507, TCA-2A): Parts matching the core electrical parameters (2 A, 250 V AC, ceramic cartridge, slow blow) with compatible holder requirements. Variations exist in DC voltage ratings, breaking capacity, and melting I²t values, which do not affect AC circuit protection performance at the specified ratings.

Substitution logic is based strictly on:

• Current rating: 2 A (mandatory match)
• AC voltage rating: 250 V (mandatory match)
• Fuse type: Ceramic cartridge (mandatory match)
• Response time: Slow blow (mandatory match)
• Mechanical compatibility: 3AB/3AG holder or equivalent 1/4" x 1-1/4" form factor (mandatory match)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: GSA 2-R

The GSA 2-R is the direct manufacturer equivalent from Bel Fuse Inc. with active product status. It maintains identical electrical and mechanical specifications to the obsolete GSA 2, with improved DC cold resistance (0.115 Ohms vs. 0.14 Ohms) and RoHS3 compliance. Approval certifications include CE, CSA, cULus, and PSE, providing broad regulatory coverage. This part is the preferred replacement for direct substitution in existing designs.

Secondary Recommendation: 0326002.VXP (Littelfuse Inc.)

The 0326002.VXP maintains identical package form factor (3AB, 3AG, 1/4" x 1-1/4") and electrical ratings for AC operation. It provides enhanced DC voltage rating (125 V DC) and higher breaking capacity for DC circuits (10kA DC). RoHS3 compliant with CE, CSA, PSE, and UL certifications. Suitable for applications requiring extended DC protection capability.

Alternative Recommendation: TCA-2A (OptiFuse)

The TCA-2A provides identical AC electrical ratings and mechanical compatibility with 3AB/3AG holders. Active product status with RoHS3 compliance and cULus/UL 248 certification. Recommended for applications where OptiFuse supply chain integration is preferred.

Not Recommended for Direct Substitution: 0001.2507 (SCHURTER Inc.)

The 0001.2507 uses a different mechanical form factor (5mm x 20mm) requiring a different holder type. While electrical ratings match for AC operation, mechanical incompatibility with 3AB/3AG holders prevents direct substitution without system redesign.

Frequently Asked Questions (FAQ)

Q: Can GSA 2-R be used as a direct replacement for GSA 2?

A: Yes. GSA 2-R is the direct manufacturer equivalent with identical current rating (2 A), AC voltage rating (250 V), package form factor (3AB, 3AG, 1/4" x 1-1/4"), and response time (slow blow). It is compatible with existing 3AB/3AG holders without modification.

Q: What is the difference between GSA 2 and 0326002.VXP?

A: Both parts share identical AC electrical ratings (2 A, 250 V) and mechanical compatibility (3AB, 3AG, 1/4" x 1-1/4" holders). The 0326002.VXP provides additional DC voltage rating (125 V DC) and higher DC breaking capacity (10kA DC), making it suitable for mixed AC/DC applications. Melting I²t differs (80 vs. 61), reflecting different thermal response characteristics.

Q: Why is 0001.2507 listed as a similar part but not recommended?

A: The 0001.2507 uses a 5mm x 20mm form factor, which is mechanically incompatible with 3AB/3AG holders required for GSA 2 applications. Although electrical ratings match for AC operation, substitution would require changing the fuse holder, making it unsuitable for direct replacement.

Q: Are all substitute parts RoHS3 compliant?

A: GSA 2-R, 0326002.VXP, 0001.2507, and TCA-2A are all RoHS3 compliant. The original GSA 2 is RoHS non-compliant. Compliance status should be verified against specific procurement requirements.

Q: What approval certifications should I verify for my application?

A: All substitute parts carry multiple regulatory certifications (CE, CSA, UL, PSE, cULus, VDE, etc.). Verify that the selected part includes certifications required by your specific application region and standards body. GSA 2-R provides the broadest certification coverage matching the original part.

Q: Can TCA-2A be used in place of GSA 2?

A: Yes, for AC circuit protection applications. TCA-2A maintains identical AC electrical ratings (2 A, 250 V), response time (slow blow), and mechanical compatibility (3AB, 3AG, 1/4" x 1-1/4" holders). It is an active product with RoHS3 compliance and cULus/UL 248 certification.