BK/MDA-8/10-R Equivalent & Substitute Parts

Part Overview

The Eaton BK/MDA-8/10-R is an 800 mA, 250 V AC ceramic cartridge fuse with slow-blow response characteristics, designed for 3AB and 3AG holder compatibility with 1/4" x 1-1/4" dimensions. This product is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system operation and maintenance.

Substiute Parts

BK/MDA-8/10-R

Eaton - Electronics DivisionIn Stock: 901BK/MDA-8/10-R Datasheet

Current PartRFQ

0001.2523

SCHURTER Inc.In Stock: 11520001.2523 Datasheet

DirectRFQ

0326.800MXP

Littelfuse Inc.In Stock: 24320326.800MXP Datasheet

DirectRFQ

0326.800VXP

Littelfuse Inc.In Stock: 8460326.800VXP Datasheet

DirectRFQ

0326.800HXP

Littelfuse Inc.In Stock: 10430326.800HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDA-8/10-R is determined by the following mandatory parameters:

Primary Compatibility Criteria:

• Current Rating: 800 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Criteria:

• Fuse Type: Cartridge construction (ceramic or glass acceptable)
• Size / Dimension: 0.250" Dia x 1.250" L ±0.002" (mechanical fit requirement)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Substitute parts meeting all primary criteria are classified as direct equivalents. Parts with identical electrical parameters but different fuse material composition (ceramic vs. glass) remain functionally equivalent when all other parameters align.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Ceramic Cartridge Fuses):

The Littelfuse 326 series parts (0326.800HXP, 0326.800MXP, 0326.800VXP) are direct functional equivalents to the BK/MDA-8/10-R. All three parts share identical electrical parameters (800 mA, 250 V AC, 125 V DC), mechanical dimensions, and response characteristics. These parts carry active product status with comprehensive approval certifications (CE, CSA, UL), ensuring regulatory compliance and long-term availability. The ceramic construction matches the original design intent.

Parametric Equivalent (Glass Cartridge Fuse):

The SCHURTER 0001.2523 meets all primary electrical and mechanical compatibility criteria with 800 mA current rating, 250 V AC voltage rating, and identical package dimensions. The glass construction differs from the ceramic original but maintains functional equivalence for slow-blow protection. DC voltage rating is specified at 63 V compared to 125 V for Littelfuse alternatives. This part carries cURus certification and active product status.

Selection Basis:

• All substitute parts maintain ROHS3 compliance
• Littelfuse alternatives provide higher DC voltage rating (125 V) and broader certification coverage (CE, CSA, UL)
• SCHURTER alternative provides active product status with cURus certification and glass construction
• Mechanical compatibility is confirmed across all alternatives with 3AB/3AG holder compatibility

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0326.800HXP, 0326.800MXP, and 0326.800VXP be used interchangeably?

A: Yes. These three Littelfuse parts are electrically and mechanically identical. All share 800 mA current rating, 250 V AC / 125 V DC voltage ratings, ceramic construction, slow-blow response, and 3AB/3AG package compatibility. Selection between them is based on inventory availability and lead time.

Q: What is the difference between the Littelfuse ceramic fuses and the SCHURTER glass fuse?

A: The primary difference is fuse element material. Littelfuse 326 series uses ceramic construction; SCHURTER 0001.2523 uses glass construction. Both meet the 800 mA, 250 V AC electrical requirements and 3AB/3AG mechanical compatibility. The SCHURTER part specifies 63 V DC rating versus 125 V DC for Littelfuse alternatives. Ceramic and glass cartridge fuses have different thermal and mechanical characteristics but are both acceptable for slow-blow protection applications.

Q: Are all substitute parts compatible with existing 3AB and 3AG holders?

A: Yes. All substitute parts are specified for 3AB and 3AG holder compatibility with 1/4" x 1-1/4" dimensions. The SCHURTER part dimension is 0.250" Dia x 1.252" L, a 0.002" length variation within mechanical tolerance for holder fit.

Q: What certifications do the substitute parts carry?

A: Littelfuse 326 series parts (0326.800HXP, 0326.800MXP, 0326.800VXP) carry CE, CSA, and UL certifications. SCHURTER 0001.2523 carries cURus certification. All parts are ROHS3 compliant.

Q: Why is the original BK/MDA-8/10-R classified as obsolete?

A: The Eaton MDA series has been discontinued. Active equivalent alternatives from Littelfuse and SCHURTER provide identical electrical and mechanical functionality with current product status and full regulatory certifications.

Q: Can I use a substitute part with higher DC voltage rating in an AC-only application?

A: Yes. The Littelfuse alternatives with 125 V DC rating are suitable for AC-only applications. Higher voltage ratings do not restrict use in lower voltage applications when all other parameters (current, AC voltage, response time, package) match the original specification.