BK/MDA-V-30-RJ Ceramic Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The BK/MDA-V-30-RJ is a 30 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 703 units currently in stock. Equivalent substitute parts are identified when electrical ratings, mechanical dimensions, fuse characteristics, and approval certifications align with the original specification, ensuring direct circuit compatibility without design modification.

Substiute Parts

BK/MDA-V-30-RJ

Eaton - Electronics DivisionIn Stock: 737BK/MDA-V-30-RJ Datasheet

Current PartRFQ

BK/MDA-V-30-R

Eaton - Electronics DivisionIn Stock: 1699BK/MDA-V-30-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/MDA-V-30-RJ are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Current Rating: 30 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: 1.5kA AC, 10kA DC (exact match required)

Mechanical Equivalence Criteria:

• Fuse Type: Cartridge, Ceramic (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Mounting Type: Through Hole (exact match required)
• Physical Dimensions: 0.266" Dia x 1.292" L (exact match required)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant (minimum requirement)
• Approval Agencies: CSA and/or UL certification (required for safety-critical applications)

The BK/MDA-V-30-R meets all substitution criteria and is classified as a parametric equivalent to the BK/MDA-V-30-RJ.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Basis:

The BK/MDA-V-30-R is a direct parametric equivalent to the BK/MDA-V-30-RJ. Both parts are manufactured by Eaton - Electronics Division within the MDA series and maintain identical electrical ratings, mechanical dimensions, and fuse characteristics. The DC cold resistance values (0.002465 Ohms vs. 0.00243 Ohms) are functionally equivalent within normal engineering tolerances for ceramic cartridge fuses.

Compliance Considerations:

Both parts hold Active product status and comply with ROHS3 requirements. The BK/MDA-V-30-R carries expanded approval certifications (CE, CSA, UL) compared to the main part (CSA, UR), providing additional regulatory coverage for applications requiring UL or CE compliance. The BK/MDA-V-30-RJ maintains CSA and UR certifications, which are sufficient for applications within those regulatory frameworks.

Inventory Availability:

The BK/MDA-V-30-R offers higher inventory availability (1655 units) compared to the BK/MDA-V-30-RJ (703 units), making it a practical alternative for high-volume procurement or time-sensitive applications.

Application Compatibility:

Both parts are suitable for identical circuit applications requiring 30 A protection at 250 V AC / 125 V DC with slow-blow response characteristics. No circuit redesign or component repositioning is required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDA-V-30-R be used as a direct replacement for the BK/MDA-V-30-RJ in existing designs?

A: Yes. Both parts are parametric equivalents with identical current ratings (30 A), voltage ratings (250 V AC / 125 V DC), fuse type (ceramic cartridge), response time (slow blow), and physical dimensions (0.266" Dia x 1.292" L). No circuit modifications are required.

Q: Are there differences in approval certifications between these parts?

A: The BK/MDA-V-30-RJ carries CSA and UR certifications. The BK/MDA-V-30-R carries CE, CSA, and UL certifications. Both meet CSA requirements. Applications requiring UL or CE compliance should specify the BK/MDA-V-30-R.

Q: Do these fuses have identical breaking capacities?

A: Yes. Both parts have breaking capacities of 1.5kA AC and 10kA DC at rated voltage, ensuring equivalent protection performance in fault conditions.

Q: Are the physical dimensions identical for PCB mounting?

A: Yes. Both parts use the 3AB/3AG package format with dimensions of 0.266" Dia x 1.292" L (6.76mm x 32.82mm). They are mechanically interchangeable in through-hole mounting applications.

Q: What is the difference in DC cold resistance between these parts?

A: The BK/MDA-V-30-RJ has a DC cold resistance of 0.002465 Ohms, while the BK/MDA-V-30-R has 0.00243 Ohms. This minor variation (approximately 1.3%) is within normal manufacturing tolerances for ceramic cartridge fuses and does not affect circuit performance.

Q: Are both parts RoHS compliant?

A: Yes. Both the BK/MDA-V-30-RJ and BK/MDA-V-30-R are ROHS3 compliant.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. The BK/MDA-V-30-R offers higher inventory availability and expanded certifications (UL, CE), making it advantageous for applications requiring these specific approvals or for high-volume production.