BK1/MDA-8-R Equivalent & Substitute Parts Reference

Part Overview

The BK1/MDA-8-R is an 8 A, 250 V AC ceramic fuse cartridge 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 part operates as a slow-blow fuse cartridge in the 3AB/3AG form factor (1/4" x 1-1/4"), designed for circuits requiring ceramic fuse technology with 200 A breaking capacity at rated voltage.

Substiute Parts

BK1/MDA-8-R

Eaton - Electronics DivisionIn Stock: 710BK1/MDA-8-R Datasheet

Current PartRFQ

BK/MDA-8-R

Eaton - Electronics DivisionIn Stock: 1714BK/MDA-8-R Datasheet

DirectRFQ

MDA-8-R

Eaton - Electronics DivisionIn Stock: 1081MDA-8-R Datasheet

SimilarRFQ

0001.2533

SCHURTER Inc.In Stock: 30570001.2533 Datasheet

DirectRFQ

0326008.HXP

Littelfuse Inc.In Stock: 11900326008.HXP Datasheet

DirectRFQ

0326008.MXP

Littelfuse Inc.In Stock: 27100326008.MXP Datasheet

DirectRFQ

0326008.VXP

Littelfuse Inc.In Stock: 9300326008.VXP Datasheet

DirectRFQ

GSA 8-R

Bel Fuse Inc.In Stock: 1419GSA 8-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK1/MDA-8-R is determined by strict equivalence across the following parameters:

Primary Substitution Criteria:

• Current Rating: 8 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)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Parameters:

• Fuse Type: Ceramic cartridge construction
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Approval Agencies: CE, CSA, UL certifications
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories: Direct Manufacturer Equivalents (identical electrical and mechanical specifications) and Similar Manufacturer Parts (equivalent performance with minor specification variations).

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Recommended Primary Substitutes):

BK/MDA-8-R and MDA-8-R from Eaton - Electronics Division are direct functional equivalents to the obsolete BK1/MDA-8-R. Both parts maintain identical electrical specifications (8 A, 250 V AC), ceramic construction, slow-blow response, and 3AB/3AG package compatibility. Both are active products with current manufacturing status and full CE, CSA, and UL certifications. These parts are the preferred substitutes for direct replacement applications.

Tier 2 - Cross-Manufacturer Ceramic Equivalents:

The Littelfuse 326 series parts (0326008.HXP, 0326008.MXP, 0326008.VXP) provide ceramic fuse cartridge substitution with identical current, voltage, and package specifications. These parts feature higher breaking capacity (400 A versus 200 A) and extended operating temperature range (-55°C to 125°C). All three variants carry CE, CSA, UL, and additional K-MARK or PSE certifications. Selection among these three variants depends on specific regional certification requirements and inventory availability.

Tier 3 - Alternative Fuse Technology:

GSA 8-R from Bel Fuse Inc. maintains ceramic construction with matching electrical and package specifications. This part offers identical 200 A breaking capacity and includes CE, CSA, cURus, and PSE certifications. Operating temperature range extends to -55°C to 125°C.

Tier 4 - Glass Fuse Alternative:

0001.2533 from SCHURTER Inc. represents a glass fuse cartridge option with identical 8 A current rating and 250 V AC voltage. This part includes 63 V DC rating capability and significantly higher breaking capacity (1.5 kA AC, 20 kA DC). Glass construction differs from the ceramic original specification. This substitute applies only when circuit design permits glass fuse technology and DC voltage operation is required.

Frequently Asked Questions (FAQ)

Q: Can I use BK/MDA-8-R as a direct replacement for the obsolete BK1/MDA-8-R?

A: Yes. BK/MDA-8-R is a direct equivalent manufactured by the same company (Eaton - Electronics Division) with identical electrical specifications, ceramic construction, slow-blow response, and 3AB/3AG package compatibility. The part is currently active in production.

Q: What is the difference between the Littelfuse 0326008.HXP, 0326008.MXP, and 0326008.VXP variants?

A: All three Littelfuse parts share identical electrical specifications (8 A, 250 V AC), ceramic construction, and package format. The variants differ in regional certification approvals: 0326008.HXP includes K-MARK and PSE; 0326008.MXP includes K-MARK and PSE; 0326008.VXP includes KC and PSE. Selection depends on geographic market requirements and certification compliance needs.

Q: Can I substitute a glass fuse (0001.2533) for the ceramic BK1/MDA-8-R?

A: Glass fuse substitution requires circuit design verification. While 0001.2533 matches the 8 A current rating and 250 V AC voltage, it uses glass construction instead of ceramic and includes 63 V DC capability. This substitute applies only when the circuit design permits glass fuse technology and does not conflict with existing holder specifications.

Q: What does the higher breaking capacity (400 A) on Littelfuse parts mean for my application?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. Littelfuse 326 series parts (400 A) provide higher fault current handling than the original BK1/MDA-8-R (200 A). This represents enhanced safety margin in high-fault-current environments. The higher rating does not affect normal circuit operation at 8 A nominal current.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, meeting environmental and hazardous substance restrictions equivalent to the original BK1/MDA-8-R.

Q: Which substitute part has the widest operating temperature range?

A: Littelfuse 326 series parts (0326008.HXP, 0326008.MXP, 0326008.VXP), GSA 8-R, and 0001.2533 all operate across -55°C to 125°C, compared to the original part's unspecified operating temperature. This extended range provides enhanced performance in temperature-extreme applications.

Q: Do all substitute parts fit the same 3AB/3AG holder?

A: Yes. All ceramic and glass substitute parts maintain the 3AB/3AG form factor with 1/4" x 1-1/4" dimensions (6.35mm x 31.75mm), ensuring mechanical compatibility with existing fuse holders designed for the BK1/MDA-8-R.