MDA-V-2-1/2-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The MDA-V-2-1/2-R is a 2.5 A, 250 V AC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for through-hole mounting in 3AB/3AG package format with axial lead configuration (1/4" x 1-1/4"). The part is currently active in production with 1,035 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when design requirements permit alternative qualified sources.

Substiute Parts

MDA-V-2-1/2-R

Eaton - Electronics DivisionIn Stock: 1095MDA-V-2-1/2-R Datasheet

Current PartRFQ

032502.5HXP

Littelfuse Inc.In Stock: 1004032502.5HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDA-V-2-1/2-R is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match or higher 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)

Secondary Compatibility Parameters:

• Approval Agencies: Must include CE, CSA, or UL certification
• RoHS Compliance: ROHS3 Compliant status required
• Breaking Capacity: Acceptable if equal to or greater than 200 A at rated voltage
• DC Voltage Rating: Acceptable if present (provides additional application flexibility)
• Operating Temperature Range: Acceptable if specified and suitable for intended environment

The substitute part 032502.5HXP (Littelfuse Inc., Series 325) meets all critical matching parameters and qualifies as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (MDA-V-2-1/2-R): Select the MDA-V-2-1/2-R when Eaton sourcing is specified, preferred, or when the lower melting I²t value (7.2) is a design requirement. This part carries CE, CSA, and UL certifications and is ROHS3 compliant. Current inventory of 1,035 units supports immediate procurement.

Substitute Part Selection (032502.5HXP): The Littelfuse 032502.5HXP qualifies as a direct equivalent substitute. Select this part when:

• Littelfuse is an approved alternative source in your supply chain
• DC voltage capability (125 V DC) is required for dual-voltage applications
• Extended operating temperature range (-55°C ~ 125°C) is specified
• Additional certifications (K-MARK, PSE) are required for target markets
• The higher melting I²t value (136) aligns with circuit protection requirements

Compatibility Notes: Both parts are certified to CE, CSA, and UL standards and comply with ROHS3 requirements. Physical dimensions are within standard tolerance for 3AB/3AG cartridge fuses. The substitute part provides enhanced DC voltage rating and broader temperature operating range without compromising AC performance at 250 V, 2.5 A.

Frequently Asked Questions (FAQ)

Q: Can the 032502.5HXP replace the MDA-V-2-1/2-R in all applications?

A: The 032502.5HXP meets all critical electrical and mechanical parameters for direct substitution in AC applications at 250 V, 2.5 A. The substitute additionally supports 125 V DC operation. Verify that the higher melting I²t value (136 vs. 7.2) and extended operating temperature range (-55°C ~ 125°C) are compatible with your circuit design.

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

A: Melting I²t defines the thermal energy required to melt the fuse element. The MDA-V-2-1/2-R has a melting I²t of 7.2, while the 032502.5HXP has 136. This indicates the substitute requires higher thermal energy to open. Confirm that your circuit's fault current characteristics and protection requirements align with the substitute's thermal response.

Q: Are the physical dimensions interchangeable?

A: Both parts conform to the 3AB/3AG standard package format (1/4" x 1-1/4" axial). Measured dimensions show minor variation (MDA: 0.266" Dia x 1.292" L; Littelfuse: 0.275" Dia x 1.288" L), which falls within standard tolerance for cartridge fuse holders. Mechanical fit is compatible.

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

A: No. The 032502.5HXP's 125 V DC rating is an additional capability that does not impact AC performance. At 250 V AC, 2.5 A, the part operates identically to the MDA-V-2-1/2-R.

Q: Which certifications are most important for my application?

A: CE, CSA, and UL certifications are present on both parts. If your target market requires K-MARK (Korea), PSE (Japan), or other regional certifications, the Littelfuse 032502.5HXP provides broader compliance coverage.

Q: What is the difference in DC cold resistance between the two parts?

A: The MDA-V-2-1/2-R has 0.066 Ohms; the 032502.5HXP has 0.0835 Ohms. This difference is minor and does not affect circuit operation in standard applications. For circuits with extremely tight resistance budgets, confirm compatibility with your design specifications.

Q: Are both parts currently available?

A: Yes. The MDA-V-2-1/2-R has 1,035 units in stock; the 032502.5HXP has 940 units in stock. Both are listed as active products.