MDA-V-1/4-R Equivalent & Substitute Parts

Part Overview

The MDA-V-1/4-R is a 250 mA ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 250 V AC operation with slow-blow response characteristics. This fuse is designed for through-hole mounting in 3AB, 3AG form factor (1/4" x 1-1/4" axial configuration) and is currently in active production status. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit equivalent electrical and mechanical specifications.

Substiute Parts

MDA-V-1/4-R

Eaton - Electronics DivisionIn Stock: 1073MDA-V-1/4-R Datasheet

Current PartRFQ

0325.250HXP

Littelfuse Inc.In Stock: 9030325.250HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDA-V-1/4-R is permissible with parts that maintain the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 250 mA
• Voltage Rating - AC: 250 V
• Fuse Type: Cartridge, Ceramic
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial)
• Mounting Type: Through Hole
• Approval Agencies: CE, CSA, UL certification

Allowable Variations:

• DC voltage rating (if not specified in original design)
• Breaking capacity at rated voltage
• Melting I²t characteristics
• Operating temperature range
• DC cold resistance
• Physical dimensions within tolerance

The substitute part 0325.250HXP from Littelfuse Inc. meets all mandatory matching parameters and is therefore classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the MDA-V-1/4-R and 0325.250HXP are active production parts with identical core electrical specifications for AC operation at 250 V, 250 mA. Both parts carry CE, CSA, and UL approvals and are ROHS3 compliant, meeting regulatory requirements for equivalent applications.

The 0325.250HXP provides additional DC voltage rating (125 V) and higher breaking capacity specifications, which may be advantageous in applications requiring dual-voltage operation or enhanced fault protection. The Littelfuse part also specifies an operating temperature range of -55°C to 125°C, whereas the Eaton part does not specify this parameter.

Physical dimensions are within acceptable tolerance for 3AB, 3AG form factor compatibility. Both parts are suitable for direct substitution in through-hole mounting applications where the specified electrical parameters are met.

Frequently Asked Questions (FAQ)

Q: Can the 0325.250HXP replace the MDA-V-1/4-R in all applications?

A: Yes, for AC applications at 250 V, 250 mA with slow-blow response requirements. The 0325.250HXP meets all mandatory electrical and mechanical parameters. The additional DC voltage rating does not create incompatibility.

Q: What is the significance of the different melting I²t values (0.28 vs 0.432)?

A: The melting I²t value indicates the thermal energy required to melt the fuse element. The 0325.250HXP has a higher value, meaning it requires more thermal energy to operate. This difference is within acceptable tolerance for the 250 mA, 250 V AC specification and does not prevent substitution.

Q: Are the physical dimension differences significant?

A: The dimensional differences (0.266" vs 0.275" diameter; 1.292" vs 1.288" length) are within standard tolerance for 3AB, 3AG cartridge fuses and do not affect mechanical compatibility in standard fuse holders.

Q: Does the DC cold resistance difference affect AC operation?

A: No. DC cold resistance (9.1 Ohms vs 4.43 Ohms) does not affect AC circuit performance. Both values are acceptable for the specified 250 mA, 250 V AC application.

Q: What certifications apply to both parts?

A: Both the MDA-V-1/4-R and 0325.250HXP carry CE, CSA, and UL approvals, ensuring compliance with international safety standards for ceramic cartridge fuses.