BK/MDA-10 Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The BK/MDA-10 is a 10 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 3AB and 3AG fuse holders with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part carries an obsolete product status, which necessitates identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for continued circuit protection applications.

Substiute Parts

BK/MDA-10

Eaton - Electronics DivisionIn Stock: 2185BK/MDA-10 Datasheet

Current PartRFQ

BK/MDA-10-R

Eaton - Electronics DivisionIn Stock: 3158BK/MDA-10-R Datasheet

DirectRFQ

MDA-10-R

Eaton - Electronics DivisionIn Stock: 956MDA-10-R Datasheet

DirectRFQ

BK/MDA-10-R-TC

Eaton - Electronics DivisionIn Stock: 842BK/MDA-10-R-TC Datasheet

Parametric EquivalentRFQ

0326010.HXP

Littelfuse Inc.In Stock: 19270326010.HXP Datasheet

DirectRFQ

0326010.MXP

Littelfuse Inc.In Stock: 161170326010.MXP Datasheet

DirectRFQ

0326010.VXP

Littelfuse Inc.In Stock: 8780326010.VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDA-10 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Current Rating: 10 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)

All substitute parts listed maintain these critical parameters. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies do not preclude substitution when the critical parameters align. The Littelfuse 326 series components (0326010.HXP, 0326010.MXP, 0326010.VXP) and Eaton MDA series variants (BK/MDA-10-R, MDA-10-R, BK/MDA-10-R-TC) satisfy all critical substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

Eaton MDA Series Substitutes (Direct Manufacturer Equivalents):

The BK/MDA-10-R, MDA-10-R, and BK/MDA-10-R-TC represent direct manufacturer equivalents from Eaton - Electronics Division. These parts maintain identical electrical and mechanical specifications to the obsolete BK/MDA-10 while offering active product status and ROHS3 compliance. Selection from this group is appropriate for applications requiring continuity with the original manufacturer's product line. All three variants carry CSA and UL approvals; BK/MDA-10-R and MDA-10-R additionally carry CE certification.

Littelfuse 326 Series Substitutes (Cross-Manufacturer Alternatives):

The 0326010.HXP, 0326010.MXP, and 0326010.VXP represent parametric equivalents manufactured by Littelfuse Inc. These components satisfy all critical substitution parameters while offering higher breaking capacity (400 A versus 200 A) and lower melting I²t values (137 versus 332 or 1491.3). All three variants are ROHS3 compliant and carry multiple international approvals (CE, CSA, UL, K-MARK, PSE, and KC variants). The 0326010.MXP variant maintains the highest inventory availability at 16,029 units.

Compliance Considerations:

For applications subject to RoHS requirements, all substitute parts listed (Eaton MDA-10-R variants and Littelfuse 326 series) provide ROHS3 compliance, addressing the non-compliance status of the original BK/MDA-10. Selection should account for specific approval agency requirements within the target application region.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDA-10 be directly replaced with BK/MDA-10-R or MDA-10-R?

A: Yes. The BK/MDA-10-R and MDA-10-R maintain identical electrical ratings (10 A, 250 V AC), fuse type (ceramic cartridge), response time (slow blow), and mechanical package (3AB, 3AG, 1/4" x 1-1/4"). Both are active products with ROHS3 compliance and carry the same approval agencies (CSA, UL). Physical and electrical interchangeability is confirmed.

Q: What is the difference between BK/MDA-10-R and MDA-10-R?

A: Both parts are manufactured by Eaton - Electronics Division and share identical electrical and mechanical specifications. The primary distinction is the part number designation; BK/MDA-10-R includes the "BK" prefix. Both are active products with equivalent availability and compliance status.

Q: Can Littelfuse 326 series fuses (0326010.HXP, 0326010.MXP, 0326010.VXP) replace the BK/MDA-10?

A: Yes. The Littelfuse 326 series components meet all critical substitution parameters: 10 A current rating, 250 V AC voltage rating, ceramic cartridge type, slow blow response, and 3AB/3AG package compatibility. These cross-manufacturer alternatives are ROHS3 compliant and carry broader international approvals. The higher breaking capacity (400 A) and lower melting I²t (137) represent enhanced performance characteristics suitable for the same circuit protection applications.

Q: Are there differences in approval agencies among the substitute parts?

A: Yes. The original BK/MDA-10 carries CSA and UL approvals. The Eaton MDA-10-R variants add CE certification. Littelfuse 326 series components carry CE, CSA, UL, K-MARK, and PSE approvals, with 0326010.VXP additionally including KC certification. Selection should align with regional regulatory requirements and application-specific approval mandates.

Q: What is the significance of the melting I²t parameter difference between BK/MDA-10 and substitute parts?

A: The melting I²t value characterizes the thermal energy required to melt the fuse element. The original BK/MDA-10 specifies 1491.3 A²s, while Eaton MDA-10-R variants specify 332 A²s, and Littelfuse 326 series components specify 137 A²s. Lower I²t values indicate faster thermal response. All values remain within the 10 A slow blow fuse classification and maintain compatibility with standard 3AB/3AG holder applications. Application-specific thermal requirements should guide final selection.

Q: Is the BK/MDA-10-R-TC variant different from BK/MDA-10-R?

A: The BK/MDA-10-R-TC maintains identical electrical and mechanical specifications to BK/MDA-10-R. The "TC" designation indicates a specific product variant. Both are active, ROHS3 compliant, and carry CSA and UL approvals. Selection between these variants depends on specific procurement or application documentation requirements.

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

A: Yes. All listed substitute parts are specified for use in both 3AB and 3AG fuse holders. The 1/4" x 1-1/4" (6.35mm x 31.75mm) physical dimensions are identical across all parts, ensuring mechanical compatibility with both holder types.

Q: Which substitute part offers the best inventory availability?

A: The Littelfuse 0326010.MXP maintains the highest inventory availability at 16,029 units. The Eaton BK/MDA-10-R follows with 3,117 units. Inventory levels should be verified at the time of procurement, as availability is subject to change.