GSA 7-R Equivalent & Substitute Parts

Part Overview

The GSA 7-R is a 7 A, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc. This slow-blow fuse is designed for applications requiring overcurrent protection in industrial and commercial equipment. The part is active in production with 922 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for designs utilizing this fuse specification.

Substiute Parts

GSA 7-R

Bel Fuse Inc.In Stock: 1032GSA 7-R Datasheet

Current PartRFQ

0326007.MXP

Littelfuse Inc.In Stock: 11250326007.MXP Datasheet

DirectRFQ

TCA-7A

OptiFuseIn Stock: 2575TCA-7A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GSA 7-R are qualified based on the following electrical and mechanical parameters:

• Current Rating: 7 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

All identified substitutes meet these core parameters and are therefore electrically and mechanically interchangeable in applications designed for the GSA 7-R.

Parameter Comparison

Engineering Selection Recommendations

All three parts—GSA 7-R, 0326007.MXP, and TCA-7A—are active products with ROHS3 compliance and meet the core electrical and mechanical specifications for 7 A, 250 V AC/DC ceramic cartridge fuse applications.

The 0326007.MXP (Littelfuse) offers higher breaking capacity (400 A versus 200 A) and carries additional certifications including K-MARK and UL. The TCA-7A (OptiFuse) carries UL 248 certification. Selection among these substitutes should be based on design requirements for breaking capacity, required certifications, and supply availability.

Frequently Asked Questions (FAQ)

Q: Can the 0326007.MXP be used as a direct replacement for the GSA 7-R?

A: Yes. Both parts share identical current rating (7 A), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (slow blow), package specification (3AB, 3AG, 1/4" x 1-1/4"), and operating temperature range (-55°C ~ 125°C). Physical dimensions are within tolerance (1.250" versus 1.252" length). Both are ROHS3 compliant.

Q: What is the difference in breaking capacity between these parts?

A: The GSA 7-R and TCA-7A have a breaking capacity of 200 A at rated voltage. The 0326007.MXP has a breaking capacity of 400 A. Breaking capacity indicates the maximum fault current the fuse can safely interrupt. Applications with higher fault current levels may require the 0326007.MXP.

Q: Are all three parts certified to the same standards?

A: No. The GSA 7-R carries CE, CSA, cURus, and PSE certifications. The 0326007.MXP carries CE, CSA, K-MARK, PSE, and UL certifications. The TCA-7A carries cULus and UL 248 certifications. Design requirements may specify particular certifications.

Q: What is the significance of the melting I²t value?

A: Melting I²t is a thermal characteristic that describes the fuse's response to overcurrent. The GSA 7-R has a melting I²t of 372, while the 0326007.MXP has a melting I²t of 47.3. Lower values indicate faster thermal response. This parameter should be evaluated against circuit protection requirements.

Q: Are these parts physically interchangeable in a 3AB/3AG fuse holder?

A: Yes. All three parts conform to the 3AB and 3AG package specification with dimensions of 1/4" diameter and approximately 1.25" length. They are mechanically interchangeable in standard 3AB/3AG fuse holders.