Equivalent & Substitute Parts for MDA-25-R Ceramic Fuse Cartridge

Part Overview

The MDA-25-R is a 25 A ceramic fuse cartridge manufactured by Eaton - Electronics Division, rated for 250 V AC and 125 V DC operation. This slow-blow cartridge fuse requires a compatible holder (3AB, 3AG format) and is designed for applications requiring reliable overcurrent protection in industrial and commercial electrical systems. The part maintains Active product status with full compliance to CE, CSA, and UL approval agencies. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

MDA-25-R

Eaton - Electronics DivisionIn Stock: 838MDA-25-R Datasheet

Current PartRFQ

BK/MDA-25-R

Eaton - Electronics DivisionIn Stock: 1574BK/MDA-25-R Datasheet

DirectRFQ

0001.2538

SCHURTER Inc.In Stock: 14620001.2538 Datasheet

DirectRFQ

0326025.HXP

Littelfuse Inc.In Stock: 11140326025.HXP Datasheet

SimilarRFQ

0326025.MXP

Littelfuse Inc.In Stock: 22350326025.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDA-25-R is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 25 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 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" (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Factors:

• RoHS3 Compliance (required for environmental standards)
• Approval Agency certifications (CE, CSA, UL preferred for regulatory alignment)
• Physical dimensions (0.250" Dia x 1.250" L tolerance)

Parts meeting all primary criteria are classified as Direct Equivalents. Parts meeting primary criteria with minor variations in secondary factors are classified as Similar Substitutes. Parts with voltage or current deviations are classified as Limited Substitutes and require application-specific evaluation.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent - BK/MDA-25-R (Eaton - Electronics Division)

The BK/MDA-25-R is a direct equivalent to the MDA-25-R. Both parts are manufactured by Eaton - Electronics Division and share identical electrical specifications: 25 A current rating, 250 V AC / 125 V DC voltage ratings, slow-blow response, and ceramic cartridge construction. Physical dimensions, breaking capacity, melting I²t, and approval certifications (CE, CSA, UL) are identical. This part is suitable for direct substitution in all applications where MDA-25-R is specified. Inventory availability is 1487 pieces.

Similar Substitute - 0326025.HXP and 0326025.MXP (Littelfuse Inc.)

The 0326025.HXP and 0326025.MXP are similar substitutes manufactured by Littelfuse Inc. Both parts match the MDA-25-R in all primary electrical parameters: 25 A current rating, 250 V AC / 125 V DC voltage ratings, slow-blow response, ceramic cartridge type, and 3AB/3AG package format. Physical dimensions are identical (0.250" Dia x 1.250" L). Both parts hold Active product status and maintain ROHS3 compliance. Approval certifications include CE, CSA, UL, plus additional K-MARK and PSE certifications. Operating temperature range extends to -55°C ~ 125°C. These parts are suitable for substitution in applications requiring the specified voltage and current ratings. Inventory availability: 0326025.HXP (1026 pieces), 0326025.MXP (2200 pieces).

Limited Substitute - 0001.2538 (SCHURTER Inc.)

The 0001.2538 is a limited substitute with voltage deviations. This SCHURTER part maintains the 25 A current rating and ceramic cartridge type but operates at reduced voltage ratings: 150 V AC (versus 250 V AC) and 63 V DC (versus 125 V DC). Physical package format (3AB, 3AG, 1/4" x 1-1/4") and slow-blow response are identical. This part is suitable only for applications operating at or below 150 V AC and 63 V DC. Use in higher-voltage circuits will result in inadequate protection. Approval certification is cURus. Inventory availability is 1387 pieces.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-25-R be used as a direct replacement for MDA-25-R?

A: Yes. BK/MDA-25-R is a direct equivalent manufactured by the same company (Eaton - Electronics Division) with identical electrical specifications, physical dimensions, and approval certifications. No application modifications are required.

Q: Are the Littelfuse parts 0326025.HXP and 0326025.MXP interchangeable with MDA-25-R?

A: Yes, for applications requiring 25 A at 250 V AC / 125 V DC. Both Littelfuse parts match all primary electrical parameters and physical package requirements. They hold equivalent approval certifications and maintain ROHS3 compliance. The extended operating temperature range (-55°C ~ 125°C) provides additional capability in temperature-sensitive applications.

Q: What is the key difference between 0326025.HXP and 0326025.MXP?

A: Both parts are electrically and mechanically identical. The primary difference is inventory availability: 0326025.MXP has higher stock (2200 pieces) compared to 0326025.HXP (1026 pieces). Selection should be based on procurement lead time and supply chain requirements.

Q: Can 0001.2538 (SCHURTER) replace MDA-25-R in all applications?

A: No. The 0001.2538 has reduced voltage ratings (150 V AC / 63 V DC) compared to MDA-25-R (250 V AC / 125 V DC). This part is suitable only for circuits operating at or below these lower voltage levels. Use in higher-voltage applications will compromise overcurrent protection and violate safety standards.

Q: What does the 3AB/3AG package format mean?

A: 3AB and 3AG refer to standardized fuse holder formats. The MDA-25-R and all listed substitutes use the same physical cartridge dimensions (1/4" x 1-1/4" or 6.35mm x 31.75mm) and are compatible with holders designed for these formats. Verify holder compatibility before installation.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts listed (MDA-25-R, BK/MDA-25-R, 0326025.HXP, 0326025.MXP, and 0001.2538) maintain ROHS3 compliance, meeting environmental and hazardous substance restrictions.

Q: Which approval certifications are most critical for industrial applications?

A: CE, CSA, and UL certifications are standard for industrial electrical protection devices. All direct and similar substitutes (MDA-25-R, BK/MDA-25-R, 0326025.HXP, 0326025.MXP) hold these certifications. The 0001.2538 holds cURus certification, which is acceptable for specific regional markets but differs from the primary certification set.

Q: What is melting I²t and why does it vary among substitutes?

A: Melting I²t is a thermal energy parameter indicating the fuse's response to overcurrent. MDA-25-R and BK/MDA-25-R have melting I²t of 734.69, while Littelfuse parts (0326025.HXP, 0326025.MXP) have 1030, and SCHURTER (0001.2538) has 1390. Higher values indicate slower thermal response. For slow-blow applications, these variations are within acceptable ranges for the 25 A rating class.