GSA 4 Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The GSA 4 is a 4A 250VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for 3AB and 3AG holder applications with a 1/4" x 1-1/4" form factor. The main part (GSA 4) carries an obsolete product status, making substitute identification critical for ongoing system support and component procurement. Direct replacements and parametric equivalents are available from active product lines that maintain electrical and mechanical compatibility.

Substiute Parts

GSA 4

Bel Fuse Inc.In Stock: 1226GSA 4 Datasheet

Current PartRFQ

GSA 4-R

Bel Fuse Inc.In Stock: 3622GSA 4-R Datasheet

DirectRFQ

0001.2510

SCHURTER Inc.In Stock: 165340001.2510 Datasheet

SimilarRFQ

TCA-4A

OptiFuseIn Stock: 4282TCA-4A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GSA 4 ceramic fuse is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

Electrical Parameters: Current rating (4 A), AC voltage rating (250 V), fuse type (cartridge ceramic), and response time (slow blow) must match exactly.

Mechanical Parameters: Package designation (3AB, 3AG) and physical dimensions (1/4" x 1-1/4" or 6.35mm x 31.80mm) must be identical to ensure holder compatibility.

Substitute Categories:

• Direct Manufacturer Substitute (GSA 4-R): Same manufacturer (Bel Fuse Inc.), identical electrical and mechanical specifications, active product status with improved compliance.
• Similar Manufacturer Substitute (0001.2510): Different manufacturer (SCHURTER Inc.), different package form factor (5mm x 20mm), different holder requirements. Electrical parameters match (4A, 250VAC) but mechanical incompatibility with 3AB/3AG holders disqualifies this as a direct substitute.
• Parametric Equivalent (TCA-4A): Different manufacturer (OptiFuse), identical electrical and mechanical specifications, active product status with full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

GSA 4-R (Bel Fuse Inc.): This is the primary substitute for the obsolete GSA 4. It is manufactured by the same supplier, maintains identical electrical and mechanical specifications, and carries active product status. The GSA 4-R achieves ROHS3 compliance and includes cURus certification, addressing regulatory requirements beyond the original part. This substitute provides direct compatibility with existing 3AB and 3AG holder installations without design modification.

TCA-4A (OptiFuse): This parametric equivalent provides an alternative from a different manufacturer while maintaining identical electrical and mechanical parameters. The TCA-4A is active, ROHS3 compliant, and certified to cULus and UL 248 standards. It is mechanically and electrically interchangeable with the GSA 4 in 3AB and 3AG holder applications.

0001.2510 (SCHURTER Inc.): This part is not suitable as a substitute for the GSA 4 despite matching electrical parameters (4A, 250VAC). The 5mm x 20mm package form factor is mechanically incompatible with 3AB and 3AG holders, which require 1/4" x 1-1/4" dimensions. This part would require holder replacement and system redesign.

Frequently Asked Questions (FAQ)

Q: Can the GSA 4-R be used as a direct replacement for the GSA 4?

A: Yes. The GSA 4-R is electrically and mechanically identical to the GSA 4 and is compatible with all 3AB and 3AG holder installations. No design changes are required.

Q: What is the difference between GSA 4 and GSA 4-R?

A: Both parts share identical electrical and mechanical specifications. The primary differences are product status (GSA 4 is obsolete; GSA 4-R is active), RoHS compliance (GSA 4 is non-compliant; GSA 4-R is ROHS3 compliant), and certification scope (GSA 4-R includes cURus certification).

Q: Can TCA-4A replace GSA 4 in my application?

A: Yes, if your application uses 3AB or 3AG holders. The TCA-4A matches all electrical and mechanical parameters of the GSA 4 and is compatible with the same holder types.

Q: Why is 0001.2510 listed if it cannot replace GSA 4?

A: The 0001.2510 shares the same current rating (4A) and AC voltage rating (250V) as the GSA 4, but its 5mm x 20mm package form factor is mechanically incompatible with 3AB and 3AG holders. It is included for reference to clarify why it is not a suitable substitute.

Q: What holder types are compatible with GSA 4 substitutes?

A: GSA 4, GSA 4-R, and TCA-4A all require 3AB or 3AG holders. The 1/4" x 1-1/4" (6.35mm x 31.80mm) form factor is standard across these three parts.

Q: Are there any compliance differences between the substitute parts?

A: GSA 4-R and TCA-4A are both ROHS3 compliant and carry active product status. GSA 4 is RoHS non-compliant and obsolete. GSA 4-R includes CE, CSA, cURus, and PSE certifications. TCA-4A is certified to cULus and UL 248 standards.