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

Part Overview

The BK/MDA-V-2-1/2R is a 2.5 A ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 250 V AC operation. This fuse is designed for through-hole mounting in 3AB/3AG package format with slow-blow response characteristics. The part maintains active product status and is RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical performance.

Substiute Parts

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

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

Current PartRFQ

032502.5HXP

Littelfuse Inc.In Stock: 1004032502.5HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDA-V-2-1/2R is determined by the following critical parameters:

Primary Substitution Criteria:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)

Secondary Compatibility Parameters:

• Physical dimensions must accommodate 3AB/3AG standard form factor
• Approval certifications must include CE, CSA, and/or UL
• RoHS3 compliance required

The substitute part 032502.5HXP (Littelfuse Inc., Series 325) satisfies all primary substitution criteria and maintains compatibility across all secondary parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: BK/MDA-V-2-1/2R (Eaton - Electronics Division)

The BK/MDA-V-2-1/2R maintains active product status with established supply availability (1000 pcs in stock). This part is certified by CE, CSA, and UL, meeting international safety standards. RoHS3 compliance ensures regulatory alignment for current manufacturing requirements.

Substitute Part: 032502.5HXP (Littelfuse Inc., Series 325)

The 032502.5HXP is a direct functional equivalent meeting all primary electrical and mechanical specifications. This part carries expanded approval certifications (CE, CSA, K-MARK, PSE, UL) and maintains RoHS3 compliance. Physical dimensions fall within standard 3AB/3AG tolerance ranges. The substitute part is available with 940 pcs in stock, supporting supply chain continuity.

Selection Basis:

Both parts satisfy identical current rating (2.5 A), AC voltage rating (250 V), fuse type (ceramic cartridge), response time (slow blow), and package format (3AB/3AG through-hole). Approval certifications for both parts include CE, CSA, and UL standards. RoHS3 compliance is maintained across both options. The substitute part provides additional DC voltage rating capability (125 V) and expanded international certifications without compromising AC circuit protection performance.

Frequently Asked Questions (FAQ)

Q: Can the 032502.5HXP replace the BK/MDA-V-2-1/2R in all applications?

A: The 032502.5HXP is electrically and mechanically compatible for AC circuits rated 250 V at 2.5 A. Both parts are ceramic cartridge fuses with slow-blow response and identical package dimensions within standard tolerance. Physical dimensions (0.275" Dia x 1.288" L versus 0.266" Dia x 1.292" L) are within 3AB/3AG standard specifications and will fit standard fuse holders.

Q: What is the difference in melting I²t values between these parts?

A: The BK/MDA-V-2-1/2R has a melting I²t of 7.2, while the 032502.5HXP has a melting I²t of 136. Both parts are rated for identical current (2.5 A) and voltage (250 V AC) with slow-blow response. The I²t difference reflects different thermal mass characteristics within the ceramic body, but both parts meet the same current rating and response time classification.

Q: Are there any voltage rating differences?

A: The BK/MDA-V-2-1/2R is specified for 250 V AC operation. The 032502.5HXP is rated for 250 V AC and 125 V DC. For AC-only applications at 250 V, both parts are equivalent. The substitute part provides additional DC capability without affecting AC circuit protection.

Q: Do both parts have the same approval certifications?

A: Both parts carry CE, CSA, and UL certifications. The 032502.5HXP includes additional certifications (K-MARK, PSE) that are not required for the primary part. For applications requiring CE, CSA, or UL compliance, both parts are acceptable.

Q: What is the DC cold resistance difference?

A: The BK/MDA-V-2-1/2R has a DC cold resistance of 0.066 Ohms, while the 032502.5HXP has 0.0835 Ohms. This difference is within acceptable tolerance for ceramic cartridge fuses and does not affect AC circuit protection performance at the rated 2.5 A, 250 V specification.

Q: Are the physical dimensions identical?

A: Physical dimensions are within standard 3AB/3AG tolerance ranges. The BK/MDA-V-2-1/2R measures 0.266" Dia x 1.292" L (6.76mm x 32.82mm), while the 032502.5HXP measures 0.275" Dia x 1.288" L (6.99mm x 32.72mm). Both parts fit standard 3AB/3AG fuse holders designed for 1/4" x 1-1/4" cartridge fuses.

Q: What is the breaking capacity difference?

A: The BK/MDA-V-2-1/2R has a breaking capacity of 200 A at rated voltage. The 032502.5HXP has a breaking capacity of 100 A AC and 10 kA DC. Both parts safely interrupt circuits at their rated 2.5 A current level. The breaking capacity specification indicates the maximum fault current the fuse can safely interrupt without rupturing the fuse body.