Equivalent & Substitute Parts for BK1/MDA-10-R Ceramic Fuse

Part Overview

The BK1/MDA-10-R is a 10 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent and substitute parts for ongoing system maintenance and new designs. The fuse operates as a slow-blow cartridge type, designed for 3AB and 3AG holder compatibility with dimensions of 0.250" diameter by 1.250" length (6.35 mm × 31.75 mm). Equivalent parts are available from Eaton and alternative manufacturers including Littelfuse Inc. and Bel Fuse Inc., all meeting the same electrical and mechanical specifications.

Substiute Parts

BK1/MDA-10-R

Eaton - Electronics DivisionIn Stock: 757BK1/MDA-10-R Datasheet

Current PartRFQ

BK/MDA-10-R

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

Parametric EquivalentRFQ

BK/MDA-10-R-TC

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

Parametric EquivalentRFQ

MDA-10-R

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

GSA 10-R

Bel Fuse Inc.In Stock: 2688GSA 10-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK1/MDA-10-R is determined by strict equivalence across the following parameters:

Critical Matching 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)
• Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Allowable Variation Parameters:

• Breaking Capacity @ Rated Voltage: 200 A to 750 A (higher values acceptable)
• Melting I²t: 137 to 817 (variation acceptable within design tolerance)
• DC Cold Resistance: 0.01 to 0.0132 Ohms (minor variation acceptable)
• Approval Agency: CE, CSA, UL as minimum; additional certifications acceptable
• Operating Temperature Range: -55°C to 125°C acceptable; unspecified acceptable
• Product Status: Active preferred; obsolete acceptable for legacy applications

All substitute parts listed maintain identical electrical performance at rated conditions and are mechanically interchangeable within standard 3AB and 3AG fuse holders.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Eaton Equivalents:

The BK/MDA-10-R and MDA-10-R are direct parametric equivalents manufactured by Eaton - Electronics Division with active product status. Both parts maintain identical electrical characteristics (10 A, 250 V, 200 A breaking capacity, 332 melting I²t) and mechanical compatibility. The BK/MDA-10-R offers CE, CSA, and UL certifications matching the original BK1/MDA-10-R. The MDA-10-R provides the same certification profile. The BK/MDA-10-R-TC variant is available with CSA and UL certifications, suitable for applications where CE marking is not required.

Secondary Recommendation - Littelfuse Alternatives:

The 0326010.HXP, 0326010.MXP, and 0326010.VXP from Littelfuse Inc. are direct manufacturer substitutes meeting all critical electrical and mechanical parameters. These parts feature enhanced breaking capacity (400 A versus 200 A) and extended operating temperature range (-55°C to 125°C). Littelfuse parts carry comprehensive international certifications including CE, CSA, UL, K-MARK, and PSE. The 0326010.MXP variant has the highest inventory availability (16,029 units).

Tertiary Recommendation - Bel Fuse Alternative:

The GSA 10-R from Bel Fuse Inc. meets all critical substitution parameters with the highest breaking capacity (750 A) and melting I²t rating (817). This part carries CE, CSA, cURus, and PSE certifications. The GSA 10-R is suitable for applications requiring enhanced fault protection margins.

Selection Criteria:

• For direct Eaton replacement: Select BK/MDA-10-R or MDA-10-R (active status, identical specifications)
• For enhanced performance margin: Select Littelfuse 0326010.MXP (highest inventory, 400 A breaking capacity)
• For maximum fault protection: Select GSA 10-R (750 A breaking capacity, highest melting I²t)

All recommended parts are mechanically interchangeable and electrically compatible within standard 3AB and 3AG fuse holder assemblies.

Frequently Asked Questions (FAQ)

Q: Can I use a Littelfuse 0326010.MXP as a direct replacement for the obsolete BK1/MDA-10-R?

A: Yes. The 0326010.MXP meets all critical electrical parameters (10 A, 250 V, slow-blow ceramic cartridge) and mechanical specifications (3AB/3AG package, 0.250" × 1.250" dimensions). The higher breaking capacity (400 A versus 200 A) and lower melting I²t (137 versus 332) represent enhanced performance characteristics acceptable for substitution. Physical installation in existing 3AB and 3AG holders is identical.

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

A: Both parts are parametrically identical with 10 A, 250 V ratings, 200 A breaking capacity, and 332 melting I²t. Both carry CE, CSA, and UL certifications. The primary difference is product designation; both are active and suitable for replacement applications.

Q: Why do the Littelfuse parts have different melting I²t values (137) compared to the original (332)?

A: Melting I²t represents the thermal energy required to melt the fuse element. The Littelfuse 326 series uses different element design, resulting in lower I²t while maintaining identical current rating and response time classification. Both values are within acceptable design parameters for slow-blow ceramic fuses at 10 A, 250 V. The lower I²t indicates faster thermal response, which is acceptable for substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (Eaton BK/MDA-10-R, BK/MDA-10-R-TC, MDA-10-R, Littelfuse 0326010.HXP/MXP/VXP, and Bel Fuse GSA 10-R) are ROHS3 compliant.

Q: Which substitute part has the best international certification coverage?

A: The Littelfuse 0326010.HXP, 0326010.MXP, and 0326010.VXP carry the broadest certification portfolio including CE, CSA, UL, K-MARK, and PSE. The 0326010.VXP adds KC certification. These parts are suitable for global applications requiring multiple regional compliance marks.

Q: Can I use the GSA 10-R in place of the BK1/MDA-10-R?

A: Yes. The GSA 10-R meets all critical electrical and mechanical substitution criteria (10 A, 250 V, slow-blow ceramic, 3AB/3AG package, 0.250" × 1.250" dimensions). The GSA 10-R features higher breaking capacity (750 A) and melting I²t (817), providing enhanced fault protection margins. Physical installation is identical.

Q: What is the difference between 3AB and 3AG fuse holder compatibility?

A: Both 3AB and 3AG are standard cartridge fuse holder designations for 1/4" × 1-1/4" ceramic fuses. All listed substitute parts are compatible with both holder types. The BK1/MDA-10-R and all substitutes are designed for use in either 3AB or 3AG holder assemblies without modification.

Q: Is the BK/MDA-10-R-TC suitable for applications requiring CE certification?

A: The BK/MDA-10-R-TC carries CSA and UL certifications but does not include CE marking. For applications requiring CE compliance, select the BK/MDA-10-R, MDA-10-R, or Littelfuse alternatives (0326010.HXP/MXP/VXP), which include CE certification.

Q: What is the operating temperature range for substitute parts?

A: The original BK1/MDA-10-R does not specify an operating temperature range. Littelfuse parts (0326010 series) and Bel Fuse GSA 10-R are rated -55°C to 125°C. Eaton equivalents (BK/MDA-10-R, MDA-10-R, BK/MDA-10-R-TC) do not specify operating temperature limits. For temperature-critical applications, Littelfuse and Bel Fuse alternatives provide documented thermal performance.