Equivalent & Substitute Parts for BK/MDA-V-2-1/2 Ceramic Fuse

Part Overview

The BK/MDA-V-2-1/2 is a 2.5 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division, designed for through-hole mounting in 3AB and 3AG package configurations. This fuse operates with slow-blow response characteristics and is rated for 200 A breaking capacity at rated voltage.

The main part number BK/MDA-V-2-1/2 carries an obsolete product status. Identifying equivalent substitute parts ensures continued availability and system reliability for applications requiring this fuse specification.

Substiute Parts

BK/MDA-V-2-1/2

Eaton - Electronics DivisionIn Stock: 1062BK/MDA-V-2-1/2 Datasheet

Current PartRFQ

BK/MDA-V-2-1/2R

Eaton - Electronics DivisionIn Stock: 1097BK/MDA-V-2-1/2R Datasheet

DirectRFQ

MDA-V-2-1/2-R

Eaton - Electronics DivisionIn Stock: 1095MDA-V-2-1/2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for ceramic cartridge fuses is determined by strict equivalence across the following parameters:

• Current Rating: Must be 2.5 A
• Voltage Rating (AC): Must be 250 V
• Fuse Type: Must be Cartridge, Ceramic
• Package / Case: Must be 3AB, 3AG, 1/4" x 1-1/4" (Axial)
• Response Time: Must be Slow Blow
• Mounting Type: Must be Through Hole
• Breaking Capacity: Must be 200 A at rated voltage
• Physical Dimensions: Must be 0.266" Dia x 1.292" L (6.76mm x 32.82mm)

All identified substitute parts meet these criteria and are manufactured by Eaton - Electronics Division within the MDA series.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts BK/MDA-V-2-1/2R and MDA-V-2-1/2-R are active products manufactured by Eaton - Electronics Division and meet all electrical and mechanical parameters specified for the obsolete BK/MDA-V-2-1/2.

BK/MDA-V-2-1/2R carries CE, CSA, and UL approvals and is ROHS3 compliant. This part is available in standard packaging.

MDA-V-2-1/2-R carries CE, CSA, and UL approvals and is ROHS3 compliant. This part is available in bulk packaging, suitable for high-volume applications.

Both substitute parts demonstrate improved compliance posture compared to the obsolete main part, with ROHS3 compliance and expanded regulatory approvals including CE certification. Selection between the two substitutes should be based on packaging requirements and procurement volume.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-V-2-1/2R or MDA-V-2-1/2-R be used as direct replacements for BK/MDA-V-2-1/2?

A: Yes. Both substitute parts are electrically and mechanically equivalent. They share identical current ratings (2.5 A), voltage ratings (250 V AC), fuse type (Cartridge, Ceramic), package configuration (3AB, 3AG, 1/4" x 1-1/4"), response time (Slow Blow), and breaking capacity (200 A). Physical dimensions are identical at 0.266" Dia x 1.292" L.

Q: What is the difference between BK/MDA-V-2-1/2R and MDA-V-2-1/2-R?

A: The primary difference is packaging. BK/MDA-V-2-1/2R is supplied in standard packaging, while MDA-V-2-1/2-R is supplied in bulk packaging. Both parts are electrically identical and carry the same certifications (CE, CSA, UL) and RoHS3 compliance status.

Q: Are there compliance differences between the main part and the substitutes?

A: Yes. The obsolete BK/MDA-V-2-1/2 is RoHS non-compliant and carries CSA and UL approvals only. Both substitute parts are ROHS3 compliant and carry expanded approvals including CE certification in addition to CSA and UL.

Q: Do the substitute parts have the same melting I²t characteristics?

A: The substitute parts BK/MDA-V-2-1/2R and MDA-V-2-1/2-R both have a melting I²t of 7.2, which differs from the main part BK/MDA-V-2-1/2 at 28.9. This difference reflects design improvements in the active product line while maintaining functional equivalence for the specified 2.5 A, 250 V application.

Q: What is the DC cold resistance specification?

A: The main part BK/MDA-V-2-1/2 has a DC cold resistance of 0.06685 Ohms. Both substitute parts have a DC cold resistance of 0.066 Ohms, representing a negligible difference of approximately 1.3%.

Q: Are these fuses suitable for both AC and DC applications?

A: The specification indicates 250 V AC rating. Voltage ratings for fuses are typically specified for AC applications. Consult application requirements and regulatory standards for DC suitability in your specific circuit design.