BK/MDA-BV-25-R Ceramic Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The BK/MDA-BV-25-R is a 25 A ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 250 V AC and 125 V DC operation. This slow-blow fuse is designed for through-hole mounting in 3AB/3AG package format with dimensions of 1/4" x 1-1/4" (6.76mm x 32.82mm). The part maintains Active product status with 752 pieces currently in stock. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

BK/MDA-BV-25-R

Eaton - Electronics DivisionIn Stock: 834BK/MDA-BV-25-R Datasheet

Current PartRFQ

BK/MDA-V-25-R

Eaton - Electronics DivisionIn Stock: 1390BK/MDA-V-25-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDA-BV-25-R is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Current Rating: 25 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5kA AC, 10kA DC (exact match required)
• Melting I²t: 734.69 (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Ceramic (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Size / Dimension: 0.266" Dia x 1.292" L (6.76mm x 32.82mm) (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)
• Manufacturer: Eaton - Electronics Division (same manufacturer preferred for consistency)

The substitute part BK/MDA-V-25-R meets all electrical, mechanical, and compliance requirements for direct substitution with the main part number.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: BK/MDA-BV-25-R

The BK/MDA-BV-25-R is the specified component with Active product status and CSA/UR approvals. This part number is suitable for applications requiring 25 A protection at 250 V AC / 125 V DC with slow-blow response characteristics. Current inventory of 752 pieces supports immediate procurement.

Substitute Part: BK/MDA-V-25-R

The BK/MDA-V-25-R is a direct parametric equivalent manufactured by the same supplier (Eaton - Electronics Division). All electrical specifications, mechanical dimensions, and performance characteristics are identical. The substitute part carries expanded regulatory approvals (CE, CSA, UL) compared to the primary part (CSA, UR), providing additional compliance coverage for international applications. Inventory availability of 1320 pieces exceeds the primary part. DC cold resistance differs marginally (0.00305 Ohms vs. 0.0031 Ohms), remaining within acceptable engineering tolerance for this component category.

Both parts maintain Active product status and ROHS3 compliance. Selection between these part numbers may be based on regulatory requirements, inventory availability, or supply chain preferences without affecting circuit performance or safety characteristics.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-V-25-R be used as a direct replacement for BK/MDA-BV-25-R?

A: Yes. Both parts are parametrically equivalent ceramic cartridge fuses with identical current ratings (25 A), voltage ratings (250 V AC / 125 V DC), response time (slow blow), package format (3AB/3AG), and mechanical dimensions (0.266" Dia x 1.292" L). All electrical performance characteristics including breaking capacity and melting I²t are identical.

Q: What are the key differences between these two part numbers?

A: The primary differences are regulatory approvals and DC cold resistance. BK/MDA-V-25-R carries CE, CSA, and UL certifications, while BK/MDA-BV-25-R carries CSA and UR certifications. DC cold resistance is 0.00305 Ohms (BK/MDA-V-25-R) versus 0.0031 Ohms (BK/MDA-BV-25-R). These differences do not affect functional equivalence or circuit compatibility.

Q: Are these fuses interchangeable in through-hole mounting applications?

A: Yes. Both fuses use identical through-hole mounting with 3AB/3AG package format and matching physical dimensions (0.266" Dia x 1.292" L / 6.76mm x 32.82mm). No modifications to PCB footprints or mounting hardware are required.

Q: Which part should be selected for international applications?

A: BK/MDA-V-25-R is recommended for international applications due to expanded regulatory approvals including CE marking, which is required for European Union markets. Both parts maintain ROHS3 compliance.

Q: What is the significance of the melting I²t value of 734.69?

A: The melting I²t value defines the thermal energy required to melt the fuse element and is a critical parameter for circuit protection coordination. Both parts have identical melting I²t values, ensuring equivalent protection characteristics in series-parallel fuse coordination schemes.

Q: Can inventory levels influence part selection?

A: Yes. BK/MDA-V-25-R has higher current inventory (1320 pieces) compared to BK/MDA-BV-25-R (752 pieces). For applications without specific regulatory constraints, the substitute part may offer improved procurement lead times and supply chain reliability.