GSAP 2.5-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The GSAP 2.5-R is a 2.5 A ceramic cartridge fuse rated for 250 V AC operation, manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and component procurement. The fuse is designed for through-hole mounting in 3AB/3AG form factor applications requiring slow-blow response characteristics.

Substiute Parts

GSAP 2.5-R

Bel Fuse Inc.In Stock: 946GSAP 2.5-R Datasheet

Current PartRFQ

032502.5MXP

Littelfuse Inc.In Stock: 797032502.5MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSAP 2.5-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 2.5 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" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The substitute part 032502.5MXP from Littelfuse Inc. meets all critical substitution criteria. This part maintains identical current, voltage, fuse type, response time, package form factor, and mounting configuration. The substitute is classified as active product status, ensuring continued availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The 032502.5MXP from Littelfuse Inc. is the qualified substitute for the obsolete GSAP 2.5-R. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts maintain identical current rating (2.5 A), AC voltage rating (250 V), ceramic cartridge construction, slow-blow response, 3AB/3AG package form factor, and through-hole mounting configuration.

Compliance & Certifications: The substitute part carries expanded regulatory approvals including UL and K-MARK certifications in addition to CE, CSA, and PSE markings present on the original part. Both components are ROHS3 compliant and REACH unaffected.

Product Availability: The substitute is classified as active product status with documented inventory availability, addressing the obsolescence of the original GSAP 2.5-R component.

Electrical Performance: The substitute provides equivalent breaking capacity at rated AC voltage (100 A) with enhanced DC breaking capacity (10 kA). The melting I²t value of 136 for the substitute exceeds the original specification of 94, indicating slightly slower thermal response. DC cold resistance values are comparable (0.0835 Ohms vs. 0.079 Ohms), representing negligible operational difference.

Frequently Asked Questions (FAQ)

Q: Can the 032502.5MXP directly replace the GSAP 2.5-R in existing applications?

A: Yes. Both components share identical current rating, voltage rating, fuse type, response time, package form factor, and mounting configuration. The substitute is mechanically and electrically compatible for direct replacement in through-hole 3AB/3AG fuse holder applications rated for 250 V AC operation.

Q: What is the significance of the higher melting I²t value in the substitute part?

A: The melting I²t value of 136 for the 032502.5MXP compared to 94 for the GSAP 2.5-R indicates slightly slower thermal response. Both parts maintain slow-blow characteristics and identical current ratings. The difference reflects manufacturing variations between manufacturers and does not affect functional compatibility in standard circuit protection applications.

Q: Does the substitute part's DC voltage rating affect AC-only applications?

A: No. The 032502.5MXP includes a 125 V DC rating specification not listed for the original GSAP 2.5-R. For AC-only applications operating at 250 V AC, this additional DC rating specification does not impact performance or compatibility. The AC voltage rating of 250 V remains the controlling parameter for AC circuit applications.

Q: Are there any dimensional differences between the two parts?

A: Dimensional differences are negligible. The GSAP 2.5-R measures 0.272" diameter × 1.280" length (6.90 mm × 32.50 mm), while the 032502.5MXP measures 0.275" diameter × 1.288" length (6.99 mm × 32.72 mm). Both conform to the 3AB/3AG standard form factor and are compatible with standard fuse holders designed for this package specification.

Q: What certifications should be verified for the substitute part in regulated applications?

A: The 032502.5MXP carries CE, CSA, K-MARK, PSE, and UL certifications. For applications requiring specific regulatory compliance, verify that the substitute part's certification portfolio meets the requirements of your target market or application standard. The original GSAP 2.5-R carried CE, CSA, cULus, and PSE certifications.