Equivalent & Substitute Parts for BK1/MDA-6-R Ceramic Fuse

Part Overview

The BK1/MDA-6-R is a 6 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as Obsolete, indicating discontinued production status. The fuse is designed for use in 3AB and 3AG holders and provides slow-blow response characteristics with a breaking capacity of 200 A at rated voltage.

Due to its obsolete status, identifying equivalent and substitute parts is necessary for system maintenance, repair, and continued operation of equipment utilizing this fuse specification. Active alternatives from the same manufacturer series are available to ensure circuit protection continuity.

Substiute Parts

BK1/MDA-6-R

Eaton - Electronics DivisionIn Stock: 896BK1/MDA-6-R Datasheet

Current PartRFQ

BK/MDA-6-R

Eaton - Electronics DivisionIn Stock: 805BK/MDA-6-R Datasheet

SimilarRFQ

MDA-6-R

Eaton - Electronics DivisionIn Stock: 828MDA-6-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK1/MDA-6-R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 6 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Ceramic
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Breaking Capacity @ Rated Voltage: 200 A
• Melting I²t: 98
• DC Cold Resistance: 0.018 Ohms
• Approval Agencies: CE, CSA, UL

All substitute parts identified maintain identical electrical and mechanical specifications. Substitutes differ only in product status (Active vs. Obsolete) and packaging configuration (Bulk vs. standard packaging).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BK/MDA-6-R

The BK/MDA-6-R is the direct equivalent to BK1/MDA-6-R with Active product status. This part maintains all electrical and mechanical specifications while offering current availability. Selection of BK/MDA-6-R is appropriate for new designs, system upgrades, and replacement applications where obsolete stock is unavailable.

Secondary Substitute: MDA-6-R

The MDA-6-R provides parametric equivalence with Active product status. This part number represents the simplified designation within the MDA series and maintains identical performance characteristics. MDA-6-R is suitable for applications requiring long-term supply continuity and standardized component designation.

Compliance Considerations:

All three part numbers carry CE, CSA, and UL approvals and maintain ROHS3 compliance. Selection between active alternatives should be based on internal procurement standards, inventory management practices, and supplier availability rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-6-R or MDA-6-R be used as direct replacements for BK1/MDA-6-R?

A: Yes. Both BK/MDA-6-R and MDA-6-R are direct substitutes. All three parts share identical electrical ratings (6 A, 250 V AC), fuse type (Cartridge, Ceramic), response time (Slow Blow), package configuration (3AB, 3AG, 1/4" x 1-1/4"), breaking capacity (200 A), and approval certifications (CE, CSA, UL).

Q: What is the difference between BK1/MDA-6-R, BK/MDA-6-R, and MDA-6-R?

A: The primary difference is product status. BK1/MDA-6-R is Obsolete, while BK/MDA-6-R and MDA-6-R are Active. All three maintain identical specifications for current rating, voltage, fuse type, response time, package dimensions, breaking capacity, and regulatory approvals. Packaging configuration may vary (standard vs. Bulk).

Q: Are these fuses compatible with 3AB and 3AG holders?

A: Yes. All three part numbers are designed for use in 3AB and 3AG holders with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). Physical and electrical compatibility is maintained across all substitutes.

Q: Do all substitutes meet the same regulatory requirements?

A: Yes. BK1/MDA-6-R, BK/MDA-6-R, and MDA-6-R all carry CE, CSA, and UL approvals and maintain ROHS3 compliance status.

Q: What is the melting I²t value, and is it consistent across substitutes?

A: The melting I²t value is 98 for all three parts. This parameter defines the thermal energy required to melt the fuse element and is identical across BK1/MDA-6-R, BK/MDA-6-R, and MDA-6-R.

Q: Is DC voltage operation supported?

A: The voltage rating specification is 250 V AC. DC cold resistance is specified at 0.018 Ohms for all parts. Consult application requirements and holder specifications for DC operation confirmation.