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

Part Overview

The BK/MDA-2-1/2-R is a 2.5 A ceramic cartridge fuse rated for 250 V AC operation, manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring circuit protection in 3AB and 3AG holder configurations with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part maintains Active product status with 1010 pieces currently in stock.

Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable, to support supply chain continuity, or to accommodate specific application requirements within the established electrical and mechanical parameters.

Substiute Parts

BK/MDA-2-1/2-R

Eaton - Electronics DivisionIn Stock: 1067BK/MDA-2-1/2-R Datasheet

Current PartRFQ

MDA-2-1/2-R

Eaton - Electronics DivisionIn Stock: 902MDA-2-1/2-R Datasheet

Parametric EquivalentRFQ

GSA 2.5-R

Bel Fuse Inc.In Stock: 1503GSA 2.5-R Datasheet

SimilarRFQ

032602.5HXP

Littelfuse Inc.In Stock: 1174032602.5HXP Datasheet

Parametric EquivalentRFQ

032602.5MXP

Littelfuse Inc.In Stock: 1194032602.5MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDA-2-1/2-R is determined by the following critical parameters:

Primary Substitution Criteria:

• 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" (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Factors:

• Physical dimensions must accommodate 3AB and 3AG holder configurations
• RoHS3 compliance status
• Regulatory approval agencies (CE, CSA, UL minimum)

Substitute parts identified in this reference maintain all primary substitution criteria. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and operating temperature range do not preclude substitution eligibility when primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and comply with required regulatory standards. Selection among equivalent parts is based on availability and application-specific compliance requirements.

MDA-2-1/2-R (Eaton - Electronics Division): Parametric equivalent to the primary part with identical electrical and mechanical specifications. Maintains CE, CSA, and UL certifications. 843 pieces in stock.

032602.5HXP (Littelfuse Inc.): Parametric equivalent with expanded regulatory approval including K-MARK and PSE certifications. Supports both AC and DC applications (125 V DC rating). 1148 pieces in stock.

032602.5MXP (Littelfuse Inc.): Parametric equivalent with expanded regulatory approval including K-MARK and PSE certifications. Supports both AC and DC applications (125 V DC rating). 1150 pieces in stock.

GSA 2.5-R (Bel Fuse Inc.): Similar manufacturer part with identical AC voltage and current ratings. Includes cULus and PSE certifications. Physical dimension variation of 0.002" in length (31.80mm vs. 31.75mm) remains within holder compatibility tolerance. 1415 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can the 032602.5HXP or 032602.5MXP be used as direct replacements for the BK/MDA-2-1/2-R?

A: Yes. Both Littelfuse parts are parametric equivalents meeting all primary substitution criteria: 2.5 A current rating, 250 V AC voltage rating, ceramic cartridge fuse type, slow-blow response, and 3AB/3AG package configuration. The additional 125 V DC rating and expanded certifications (K-MARK, PSE) provide enhanced application flexibility without compromising AC circuit protection performance.

Q: What is the difference between the MDA-2-1/2-R and the BK/MDA-2-1/2-R?

A: Both parts are manufactured by Eaton - Electronics Division and are parametric equivalents with identical electrical and mechanical specifications. The designation difference reflects internal Eaton part numbering conventions. Functionally, they are interchangeable.

Q: Is the GSA 2.5-R compatible with 3AB and 3AG holders?

A: Yes. The GSA 2.5-R is compatible with 3AB and 3AG holder configurations. The physical dimension of 0.250" Dia x 1.252" L (6.35mm x 31.80mm) represents a 0.002" length variation from the primary part specification and remains within standard holder tolerance ranges for this fuse category.

Q: What certifications are required for my application?

A: The BK/MDA-2-1/2-R carries CE, CSA, and UL certifications. If your application requires additional certifications such as K-MARK or PSE, the Littelfuse 032602.5HXP or 032602.5MXP parts provide these approvals. The Bel Fuse GSA 2.5-R includes cULus and PSE certifications. Verify application-specific regulatory requirements before final part selection.

Q: Can these fuses be used in DC applications?

A: The BK/MDA-2-1/2-R, MDA-2-1/2-R, and GSA 2.5-R are rated for AC operation. The Littelfuse 032602.5HXP and 032602.5MXP parts support both AC (250 V) and DC (125 V) applications. For DC circuit protection, select the Littelfuse equivalents.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance status, meeting environmental and material restriction requirements.