GSA 2.5-R Equivalent & Substitute Parts

Part Overview

The GSA 2.5-R is a 2.5 A ceramic cartridge fuse rated for 250 V AC operation, manufactured by Bel Fuse Inc. This slow-blow fuse is designed for applications requiring holder-based mounting in 3AB and 3AG configurations with 1/4" x 1-1/4" dimensions. The part maintains active product status with 1415 units in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory certifications align with the original specification.

Substiute Parts

GSA 2.5-R

Bel Fuse Inc.In Stock: 1503GSA 2.5-R Datasheet

Current PartRFQ

032602.5MXP

Littelfuse Inc.In Stock: 1194032602.5MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The GSA 2.5-R can be substituted with the Littelfuse 032602.5MXP based on the following alignment of critical parameters:

• Current Rating: Both parts rated at 2.5 A
• Voltage Rating - AC: Both rated at 250 V AC
• Fuse Type: Both are ceramic cartridge fuses with slow-blow response
• Package / Case: Both use 3AB, 3AG, 1/4" x 1-1/4" configuration
• Mounting Type: Both require holder-based installation
• Operating Temperature: Both operate across -55°C ~ 125°C
• Breaking Capacity: Both rated at 100 A at rated voltage
• Regulatory Compliance: Both hold CE, CSA, and PSE certifications
• RoHS Status: Both are ROHS3 compliant

The 032602.5MXP provides additional DC voltage rating (125 V DC) and higher breaking capacity for DC applications (10 kA DC), making it suitable for dual-voltage environments while maintaining full AC compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the GSA 2.5-R and 032602.5MXP maintain active product status and hold equivalent regulatory certifications for AC applications. The GSA 2.5-R is suitable for AC-only circuits operating at 250 V with 2.5 A protection requirements. The 032602.5MXP is appropriate for applications requiring dual-voltage capability (250 V AC / 125 V DC) or enhanced DC breaking capacity. Selection between these parts depends on circuit voltage requirements and available inventory. Both parts comply with ROHS3 and REACH requirements, ensuring environmental and regulatory compliance across manufacturing and deployment regions.

Frequently Asked Questions (FAQ)

Q: Can the 032602.5MXP directly replace the GSA 2.5-R in an AC-only circuit?

A: Yes. Both parts share identical AC voltage rating (250 V), current rating (2.5 A), fuse type (ceramic cartridge), response time (slow blow), and package configuration (3AB, 3AG, 1/4" x 1-1/4"). The additional DC rating on the 032602.5MXP does not affect AC circuit performance.

Q: What is the significance of the different melting I²t values?

A: The GSA 2.5-R has a melting I²t of 94, while the 032602.5MXP has 136. This indicates the 032602.5MXP requires slightly higher thermal energy to melt. Both values fall within the slow-blow fuse category and are compatible with standard 2.5 A circuit protection applications.

Q: Are the physical dimensions interchangeable?

A: The dimensions are functionally equivalent. GSA 2.5-R measures 0.250" Dia x 1.252" L (6.35mm x 31.80mm), while 032602.5MXP measures 0.250" Dia x 1.250" L (6.35mm x 31.75mm). The 0.002" length difference is negligible for holder-based mounting and does not affect mechanical compatibility.

Q: Which certifications are common to both parts?

A: Both parts hold CE, CSA, and PSE certifications. The 032602.5MXP additionally carries K-MARK and UL certifications, providing broader regional compliance coverage.

Q: Can the GSA 2.5-R be used in DC circuits?

A: The GSA 2.5-R specification does not include a DC voltage rating. Use only in AC circuits rated at 250 V. For DC applications, the 032602.5MXP with 125 V DC rating is the appropriate choice.