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

Part Overview

The BK/MDA-V-1-1/2 is a 1.5 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This fuse is classified as obsolete, which necessitates identification of active equivalent parts for continued system support and procurement. The fuse is designed for through-hole mounting in 3AB and 3AG package configurations with slow-blow response characteristics suitable for general-purpose circuit protection applications.

Substiute Parts

BK/MDA-V-1-1/2

Eaton - Electronics DivisionIn Stock: 985BK/MDA-V-1-1/2 Datasheet

Current PartRFQ

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

Eaton - Electronics DivisionIn Stock: 810BK/MDA-V-1-1/2R Datasheet

DirectRFQ

MDA-V-1-1/2-R

Eaton - Electronics DivisionIn Stock: 1090MDA-V-1-1/2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDA-V-1-1/2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 1.5 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Ceramic
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial)
• Response Time: Slow Blow
• Mounting Type: Through Hole
• Breaking Capacity @ Rated Voltage: 100 A
• Physical Dimensions: 0.266" Dia x 1.292" L (6.76mm x 32.82mm)

Both identified substitute parts—BK/MDA-V-1-1/2R and MDA-V-1-1/2-R—satisfy all mandatory matching parameters. The primary distinction between these substitutes and the obsolete main part is product status (active versus obsolete) and regulatory compliance enhancements (ROHS3 compliance versus non-compliance).

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are functionally equivalent to the BK/MDA-V-1-1/2 across all critical electrical and mechanical parameters. Selection between the two active alternatives should be based on the following factors:

Product Status: Both BK/MDA-V-1-1/2R and MDA-V-1-1/2-R are active products, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Regulatory Compliance: Both substitutes achieve ROHS3 compliance and expanded approval agency certifications (CE, CSA, UL) compared to the main part (CSA, UL only). This enhancement supports compliance with current environmental and safety standards.

Packaging Considerations: MDA-V-1-1/2-R is specified with bulk packaging, while BK/MDA-V-1-1/2R packaging is not explicitly defined. Packaging selection depends on procurement and inventory management requirements.

Inventory Availability: MDA-V-1-1/2-R offers higher inventory levels (1014 Pcs) compared to BK/MDA-V-1-1/2R (700 Pcs), supporting immediate procurement needs.

Electrical Characteristics: Both substitutes exhibit identical melting I²t values (3.4) and DC cold resistance (0.19 Ohms), which differ from the main part. These differences reflect design improvements in the active product line and do not affect functional compatibility within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-V-1-1/2R and MDA-V-1-1/2-R be used interchangeably with BK/MDA-V-1-1/2?

A: Yes. Both substitute parts match all critical electrical and mechanical parameters: 1.5 A current rating, 250 V AC voltage rating, ceramic cartridge construction, 3AB/3AG package configuration, slow-blow response, 100 A breaking capacity, and identical physical dimensions. Functional compatibility is established.

Q: What is the significance of the different melting I²t values between the main part and substitutes?

A: The melting I²t value (25 for the main part versus 3.4 for substitutes) reflects the thermal energy required to melt the fuse element. Both values are provided specifications and indicate design improvements in the active product line. The substitutes maintain the same current rating and response time classification, ensuring equivalent circuit protection performance.

Q: Does the lower DC cold resistance of the substitute parts affect circuit operation?

A: The DC cold resistance difference (0.2585 Ohms for the main part versus 0.19 Ohms for substitutes) represents a minor reduction in resistance. This improvement in the active product line does not compromise compatibility and may provide marginal benefits in low-resistance circuit applications.

Q: Are the substitute parts suitable for new equipment designs?

A: Yes. Both substitute parts are active products with current regulatory certifications (ROHS3 compliance, CE/CSA/UL approval). They are appropriate for new equipment designs and provide superior compliance status compared to the obsolete main part.

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

A: Both parts are electrically and mechanically identical. The primary difference is packaging specification: MDA-V-1-1/2-R is designated as bulk packaging, while BK/MDA-V-1-1/2R packaging is not explicitly specified. Inventory levels also differ (1014 Pcs versus 700 Pcs). Selection depends on procurement requirements and packaging preferences.

Q: Are these substitutes compatible with existing through-hole PCB designs?

A: Yes. All three parts share identical mounting type (through hole) and physical dimensions (0.266" Dia x 1.292" L / 6.76mm x 32.82mm). PCB footprints and mounting hardware remain unchanged.