Equivalent & Substitute Parts for MDA-4/10-R Ceramic Fuse

Part Overview

The MDA-4/10-R is a 400 mA, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring circuit protection in the 400 mA range at 250 V. The part operates in the 3AB and 3AG holder format with dimensions of 0.250" diameter by 1.250" length (6.35 mm x 31.75 mm). The product maintains Active status and is RoHS3 compliant with CE, CSA, and UL approvals. Substitute parts are identified when inventory availability requires alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

MDA-4/10-R

Eaton - Electronics DivisionIn Stock: 1098MDA-4/10-R Datasheet

Current PartRFQ

BK/MDA-4/10-R

Eaton - Electronics DivisionIn Stock: 736BK/MDA-4/10-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDA-4/10-R is determined by strict equivalence across the following parameters:

• Current Rating: 400 mA (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" (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Melting I²t: 0.64 (exact match required)
• DC Cold Resistance: 4 Ohms (exact match required)
• Approval Agency: CE, CSA, UL (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

Only parts meeting all these criteria are classified as parametric equivalents. The substitute identified maintains identical electrical performance and mechanical compatibility with the original specification.

Parameter Comparison

Engineering Selection Recommendations

Both the MDA-4/10-R and BK/MDA-4/10-R are Active products manufactured by Eaton - Electronics Division with identical electrical and mechanical specifications. Both parts carry CE, CSA, and UL approvals and maintain ROHS3 compliance. Selection between these parts is based on inventory availability and lead time requirements. The BK/MDA-4/10-R variant is available as a direct parametric equivalent with 658 pieces in stock, compared to 1,025 pieces for the primary MDA-4/10-R designation. Both parts are suitable for direct substitution in applications requiring 400 mA protection at 250 V AC/DC with slow-blow response characteristics in 3AB and 3AG holder formats.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-4/10-R be used as a direct replacement for MDA-4/10-R?

A: Yes. The BK/MDA-4/10-R is a parametric equivalent with identical current rating (400 mA), voltage rating (250 V AC), fuse type (Cartridge, Ceramic), response time (Slow Blow), package format (3AB, 3AG), physical dimensions (0.250" Dia x 1.250" L), melting I²t (0.64), DC cold resistance (4 Ohms), and regulatory approvals (CE, CSA, UL).

Q: What holder types are compatible with these fuses?

A: Both the MDA-4/10-R and BK/MDA-4/10-R require 3AB or 3AG holder formats. The 0.250" diameter by 1.250" length dimensions are standardized for these holder types.

Q: Are there any differences in approval certifications between the two parts?

A: No. Both parts carry identical approvals: CE, CSA, and UL. Both are ROHS3 compliant.

Q: What is the significance of the 0.64 melting I²t value?

A: The melting I²t of 0.64 defines the thermal energy required to melt the fuse element. This value is identical for both parts and determines the fuse's response characteristics in the 400 mA range.

Q: Can these fuses be used in DC applications?

A: Yes. Both parts are rated for 250 V AC/DC operation. The DC cold resistance of 4 Ohms is specified for both variants.