MDA-7-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The MDA-7-R is a 7 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring overcurrent protection in circuits rated up to 250 V AC. The part is currently active in production with 994 pieces in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and package specifications to ensure direct compatibility in holder-based fuse applications.

Substiute Parts

MDA-7-R

Eaton - Electronics DivisionIn Stock: 1103MDA-7-R Datasheet

Current PartRFQ

BK/MDA-7-R

Eaton - Electronics DivisionIn Stock: 2088BK/MDA-7-R Datasheet

DirectRFQ

0326007.HXP

LittelfuseIn Stock: 8650326007.HXP Datasheet

DirectRFQ

0326007.MXP

Littelfuse Inc.In Stock: 11250326007.MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDA-7-R is determined by the following critical parameters:

Primary Matching Criteria:

• Current Rating: 7 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Ceramic
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Physical Dimensions: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)

All identified substitute parts match these core electrical and mechanical specifications. The substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Eaton): BK/MDA-7-R is an Eaton-manufactured variant with identical electrical and physical specifications.

Parametric Equivalents (Littelfuse): 0326007.HXP and 0326007.MXP are Littelfuse ceramic cartridge fuses that match all primary electrical ratings and package dimensions. These parts are interchangeable based on the specified parameters, though they differ in breaking capacity and melting I²t values.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Manufacturer): BK/MDA-7-R is the direct Eaton equivalent to MDA-7-R. Both parts carry identical electrical specifications, breaking capacity, and melting I²t values. Selection between these two Eaton variants depends on inventory availability and supply chain requirements. Both are ROHS3 compliant and carry CE, CSA, and UL certifications.

For Cross-Manufacturer Substitution: The Littelfuse parts 0326007.HXP and 0326007.MXP are parametric equivalents that match the core electrical ratings (7 A, 250 V AC) and mechanical package specifications (3AB, 3AG, 1/4" x 1-1/4"). These parts are suitable for applications where the MDA-7-R is specified, provided the application does not depend on the specific breaking capacity or melting I²t characteristics of the Eaton part.

Littelfuse alternatives offer higher breaking capacity (400 A versus 200 A) and broader temperature operating range (-55°C to 125°C). These parts carry expanded certifications including K-MARK and PSE in addition to CE, CSA, and UL. Selection of Littelfuse alternatives is appropriate when higher breaking capacity or extended temperature performance is beneficial to the application.

Frequently Asked Questions (FAQ)

Q: Can BK/MDA-7-R be used as a direct replacement for MDA-7-R?

A: Yes. BK/MDA-7-R is manufactured by Eaton and matches all electrical and mechanical specifications of the MDA-7-R, including current rating, voltage rating, fuse type, response time, package dimensions, breaking capacity, and melting I²t. Both parts are ROHS3 compliant and carry identical certifications.

Q: Are the Littelfuse parts 0326007.HXP and 0326007.MXP compatible with the MDA-7-R?

A: Yes, based on the specified parameters. Both Littelfuse parts match the 7 A current rating, 250 V AC voltage rating, ceramic cartridge fuse type, slow-blow response, and 3AB/3AG package dimensions. Physical dimensions are identical. These parts are suitable for direct substitution in holder-based applications.

Q: What are the differences between the MDA-7-R and the Littelfuse alternatives?

A: The primary differences are breaking capacity (200 A for MDA-7-R versus 400 A for Littelfuse), melting I²t (135 for MDA-7-R versus 47.3 for Littelfuse), DC cold resistance (0.015 Ohms for MDA-7-R versus 0.0227 Ohms for Littelfuse), and operating temperature range (not specified for MDA-7-R versus -55°C to 125°C for Littelfuse). Littelfuse parts also carry additional certifications (K-MARK, PSE).

Q: Do all substitute parts fit the same holder?

A: Yes. All parts listed use the 3AB and 3AG package specification with identical physical dimensions of 0.250" diameter by 1.250" length (6.35mm x 31.75mm). All parts require a compatible fuse holder for installation.

Q: Are all substitute parts RoHS compliant?

A: Yes. MDA-7-R, BK/MDA-7-R, 0326007.HXP, and 0326007.MXP are all ROHS3 compliant.

Q: Which certifications apply to each part?

A: MDA-7-R and BK/MDA-7-R carry CE, CSA, and UL certifications. The Littelfuse parts 0326007.HXP and 0326007.MXP carry CE, CSA, K-MARK, PSE, and UL certifications.