GSA 1-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The GSA 1-R is a 1 A, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc. in the 3AB/3AG package format (1/4" x 1-1/4"). This slow-blow fuse is designed for applications requiring reliable overcurrent protection with ceramic construction and holder-based mounting. The part maintains active product status with 1752 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements where alternative manufacturers or enhanced specifications may be beneficial.

Substiute Parts

GSA 1-R

Bel Fuse Inc.In Stock: 1855GSA 1-R Datasheet

Current PartRFQ

0326001.MXP

Littelfuse Inc.In Stock: 12600326001.MXP Datasheet

DirectRFQ

TCA-1A

OptiFuseIn Stock: 5734TCA-1A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GSA 1-R is determined by strict alignment with the following critical parameters:

• Current Rating: Must be 1 A
• Voltage Rating (AC): Must be 250 V minimum
• Fuse Type: Must be Cartridge, Ceramic
• Response Time: Must be Slow Blow
• Package / Case: Must be 3AB, 3AG, 1/4" x 1-1/4" format
• Mounting Type: Must require holder-based installation
• Operating Temperature Range: Must support -55°C ~ 125°C
• RoHS Compliance: Must be ROHS3 Compliant

Two substitute parts meet these criteria: the Littelfuse 0326001.MXP (Direct Manufacturer Equivalent) and the OptiFuse TCA-1A (Parametric Equivalent). Both parts satisfy all mandatory electrical and mechanical parameters required for direct substitution in applications designed for the GSA 1-R.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse 0326001.MXP is classified as a direct manufacturer equivalent and provides enhanced specifications including DC voltage rating (125 V) and higher breaking capacity (100A AC, 10kA DC) compared to the GSA 1-R. This part carries CE, CSA, PSE, and UL certifications. The 0326001.MXP is suitable for applications requiring dual AC/DC voltage operation or higher fault current handling capability while maintaining identical AC voltage and current ratings.

OptiFuse TCA-1A is classified as a parametric equivalent and meets all core electrical and mechanical requirements of the GSA 1-R. This part carries cULus and UL 248 certifications. The TCA-1A is suitable for direct replacement in applications where the GSA 1-R specifications are fully adequate and supply chain sourcing from OptiFuse is preferred.

Both substitute parts maintain ROHS3 compliance and identical operating temperature ranges. Selection between substitutes should be based on application voltage requirements (AC-only versus AC/DC), required breaking capacity, and preferred manufacturer certifications.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0326001.MXP be used as a direct replacement for the GSA 1-R in AC-only applications?

A: Yes. The 0326001.MXP meets all AC electrical parameters (1 A, 250 V) and mechanical specifications (3AB/3AG package, 1/4" x 1-1/4" format) required for the GSA 1-R. The additional DC voltage rating does not affect AC-only operation.

Q: What is the difference between the GSA 1-R and the 0326001.MXP in terms of breaking capacity?

A: The GSA 1-R has a breaking capacity of 35A at rated voltage. The 0326001.MXP has a breaking capacity of 100A AC and 10kA DC. The higher breaking capacity of the 0326001.MXP provides enhanced fault current handling but does not affect normal operation in applications designed for the GSA 1-R.

Q: Are there dimensional differences between these three fuses?

A: The GSA 1-R and TCA-1A share identical dimensions (0.250" Dia x 1.252" L). The 0326001.MXP has a slightly shorter length (0.250" Dia x 1.250" L). All three parts fit the 3AB/3AG holder format. The minimal dimensional variation does not affect holder compatibility.

Q: Which certifications are most relevant for my application?

A: Certification selection depends on your regional and application requirements. The GSA 1-R carries CE, CSA, cULus, and PSE certifications. The 0326001.MXP carries CE, CSA, PSE, and UL certifications. The TCA-1A carries cULus and UL 248 certifications. Verify that your application requirements align with the available certifications for each part.

Q: Can I use the OptiFuse TCA-1A in applications requiring DC voltage operation?

A: The TCA-1A specifications do not include a DC voltage rating. If your application requires DC voltage operation, the Littelfuse 0326001.MXP with its 125 V DC rating is the appropriate choice.

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

A: The Melting I²t value indicates the thermal energy required to melt the fuse element. The GSA 1-R has a Melting I²t of 16, while the 0326001.MXP has 16.3. These values are closely matched, indicating similar thermal response characteristics. The TCA-1A Melting I²t value is not specified in available data.