MDA-2-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The MDA-2-R is a 2 A, 250 V AC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring holder-based installation in 3AB and 3AG configurations with 1/4" x 1-1/4" dimensions. The part maintains active product status with 833 units in current inventory. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical compatibility, and functional performance characteristics within the cartridge fuse category.

Substiute Parts

MDA-2-R

Eaton - Electronics DivisionIn Stock: 934MDA-2-R Datasheet

Current PartRFQ

BK/MDA-2-R

Eaton - Electronics DivisionIn Stock: 858BK/MDA-2-R Datasheet

DirectRFQ

0001.2527

SCHURTER Inc.In Stock: 17050001.2527 Datasheet

DirectRFQ

0326002.HXP

Littelfuse Inc.In Stock: 11960326002.HXP Datasheet

DirectRFQ

0326002.MXP

Littelfuse Inc.In Stock: 13250326002.MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDA-2-R are classified based on the following substitution criteria:

Direct Manufacturer Equivalent: Parts sharing identical electrical specifications, mechanical dimensions, and approval certifications from the same manufacturer (Eaton - Electronics Division).

Cross-Manufacturer Direct Equivalent: Parts from alternative manufacturers with matching current rating (2 A), AC voltage rating (250 V), fuse type (ceramic cartridge), response time (slow blow), and package configuration (3AB, 3AG, 1/4" x 1-1/4").

Parametric Equivalent: Parts with matching primary electrical parameters (2 A, 250 V AC) and mechanical compatibility, but with extended DC voltage ratings or enhanced thermal operating ranges that provide functional equivalence in AC-primary applications.

Substitution validity is determined by:

• Current Rating: 2 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Fuse Type: Cartridge configuration (ceramic or glass acceptable)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Parameter Comparison

Engineering Selection Recommendations

BK/MDA-2-R (Eaton - Electronics Division): This part is a direct manufacturer equivalent with identical electrical specifications, mechanical dimensions, and approval certifications (CE, CSA, UL). Selection of this substitute provides continuity with the original manufacturer while maintaining all functional and compliance characteristics. Current inventory of 817 units supports availability.

0326002.HXP and 0326002.MXP (Littelfuse Inc.): Both parts are parametric equivalents meeting the primary electrical requirements (2 A, 250 V AC) and mechanical compatibility (3AB, 3AG package). These ceramic cartridge fuses provide extended DC voltage ratings (125 V) and broader operating temperature range (-55°C ~ 125°C) compared to the MDA-2-R. Approval certifications include CE, CSA, PSE, and UL. These parts are suitable for applications requiring enhanced thermal performance or dual AC/DC voltage capability. The 0326002.HXP and 0326002.MXP are functionally identical variants with inventory levels of 1117 and 1250 units respectively.

0001.2527 (SCHURTER Inc.): This part meets the primary electrical specifications (2 A, 250 V AC) and mechanical package requirements (3AB, 3AG, 1/4" x 1-1/4"). The primary distinction is the glass cartridge construction versus ceramic. This part provides enhanced breaking capacity (1.5kA AC, 20kA DC) and operates across -40°C ~ 85°C. Approval certifications are cURus. Selection of this substitute is appropriate for applications where glass fuse construction is acceptable and enhanced breaking capacity is beneficial. Current inventory of 1691 units provides strong availability.

All substitute parts maintain ROHS3 compliance and active product status, supporting long-term supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDA-2-R be used as a direct replacement for the MDA-2-R?

A: Yes. The BK/MDA-2-R is a direct manufacturer equivalent from Eaton - Electronics Division with identical current rating (2 A), AC voltage rating (250 V), ceramic cartridge construction, slow-blow response, mechanical dimensions (0.250" Dia x 1.250" L), and approval certifications (CE, CSA, UL). Mechanical and electrical compatibility is complete.

Q: What is the difference between the ceramic fuses (MDA-2-R, BK/MDA-2-R, 0326002.HXP, 0326002.MXP) and the glass fuse (0001.2527)?

A: The primary difference is construction material. Ceramic fuses provide thermal stability and are suitable for general-purpose AC applications. Glass fuses offer visual indication of fuse status and enhanced breaking capacity. All five parts share the same current rating (2 A), AC voltage rating (250 V), response time (slow blow), and mechanical package (3AB, 3AG, 1/4" x 1-1/4"). Selection between ceramic and glass depends on application requirements for visual indication and breaking capacity specifications.

Q: Are the Littelfuse parts (0326002.HXP and 0326002.MXP) suitable for DC applications?

A: The Littelfuse parts include a DC voltage rating of 125 V, whereas the MDA-2-R does not specify a DC rating. In applications requiring DC operation, the 0326002.HXP and 0326002.MXP provide rated DC protection. For AC-only applications, all parts are functionally equivalent at the 2 A, 250 V AC specification.

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

A: The melting I²t value indicates the thermal energy required to melt the fuse element. The MDA-2-R and BK/MDA-2-R have melting I²t values of 8.8, while the Littelfuse parts (0326002.HXP, 0326002.MXP) have values of 80, and the SCHURTER part (0001.2527) has a value of 13. These differences reflect variations in fuse element design and thermal mass. All parts maintain the same current rating (2 A) and response time (slow blow), ensuring functional compatibility within the specified electrical parameters.

Q: Can these fuses be used interchangeably in existing 3AB and 3AG holders?

A: Yes. All five substitute parts conform to the 3AB and 3AG package specifications with mechanical dimensions of 0.250" Dia x 1.250" L (or 1.252" L for the SCHURTER part, representing a negligible 0.002" tolerance variation). Physical installation in existing holders is compatible across all parts.

Q: What approval certifications should I verify for my application?

A: The MDA-2-R carries CE, CSA, and UL certifications. The BK/MDA-2-R maintains identical certifications. The Littelfuse parts (0326002.HXP, 0326002.MXP) include CE, CSA, PSE, and UL certifications, providing additional PSE approval. The SCHURTER part (0001.2527) carries cURus certification. Verify that the selected substitute meets the specific regulatory requirements of your application region and end-use industry.

Q: Are all these parts RoHS3 compliant?

A: Yes. All five parts—MDA-2-R, BK/MDA-2-R, 0001.2527, 0326002.HXP, and 0326002.MXP—are ROHS3 compliant, supporting environmental and regulatory compliance requirements.