MDA-30A Equivalent & Substitute Parts Reference

Part Overview

The MDA-30A is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 30A at 250VAC and 125VDC with 3AB package configuration. This component is classified as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing. The MDA-30A operates as an AC/DC fuse with slow-blow response characteristics, providing overcurrent protection in industrial and commercial electrical applications. Due to its obsolete status, active equivalent models must be evaluated for direct replacement in existing installations.

Substiute Parts

MDA-30A

Eaton - Electronics DivisionIn Stock: 1208MDA-30A Datasheet

Current PartRFQ

MDA-30-R

Eaton - Electronics DivisionIn Stock: 790MDA-30-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDA-30A is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Current Rating: 30 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 125 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)
• Mounting Type: Requires Holder (exact match required)

The MDA-30-R is identified as a direct substitute for the MDA-30A. Both components share identical electrical ratings, ceramic cartridge construction, slow-blow response characteristics, and physical package dimensions. The MDA-30-R maintains the same 3AB/3AG holder compatibility and is manufactured by the same supplier (Eaton - Electronics Division). The primary distinction is product status: MDA-30-R is active and RoHS3 compliant, whereas MDA-30A is obsolete and non-compliant.

Parameter Comparison

Engineering Selection Recommendations

The MDA-30-R is the direct equivalent substitute for the obsolete MDA-30A. Selection of MDA-30-R is based on the following engineering criteria:

Electrical Equivalence: Both components provide identical current and voltage ratings (30A, 250VAC, 125VDC) with matching slow-blow response characteristics, ensuring functional compatibility in existing circuit protection applications.

Mechanical Compatibility: Both fuses utilize the same 3AB/3AG cartridge package with identical physical dimensions (0.250" Dia x 1.250" L), confirming direct fit compatibility with existing fuse holders and mounting hardware.

Regulatory Compliance: MDA-30-R carries active product status and RoHS3 compliance certification, addressing regulatory requirements for new installations and system upgrades. Both components share identical ECCN (EAR99) and HTSUS (8536.10.0040) classifications.

Certification Standards: MDA-30-R holds CE, CSA, and UL approvals, providing third-party validation for safety and performance standards applicable to industrial electrical systems.

Supply Availability: MDA-30-R maintains active inventory status (772 Pcs New Original In Stock), ensuring reliable sourcing for replacement and new applications, whereas MDA-30A is obsolete with limited availability.

Frequently Asked Questions (FAQ)

Q: Can MDA-30-R be used as a direct replacement for MDA-30A in existing installations?

A: Yes. The MDA-30-R is electrically and mechanically equivalent to the MDA-30A. Both components share identical current ratings (30A), voltage ratings (250VAC/125VDC), response time (slow-blow), and package configuration (3AB/3AG, 1/4" x 1-1/4"). Direct substitution is supported without circuit modification.

Q: What is the primary difference between MDA-30A and MDA-30-R?

A: The primary differences are product status and regulatory compliance. MDA-30A is obsolete and RoHS non-compliant, while MDA-30-R is active and RoHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with existing fuse holders?

A: No. Both MDA-30A and MDA-30-R utilize the same 3AB and 3AG holder standards with matching physical dimensions. Existing fuse holders designed for MDA-30A will accommodate MDA-30-R without modification.

Q: What certifications does MDA-30-R carry?

A: MDA-30-R holds CE, CSA, and UL certifications, confirming compliance with international safety and performance standards for industrial electrical components.

Q: Is MDA-30-R available for immediate sourcing?

A: Yes. MDA-30-R maintains active product status with 772 pieces in new original stock, ensuring availability for replacement and new system applications.

Q: Can MDA-30-R be used in both AC and DC circuits?

A: Yes. MDA-30-R is rated for dual-voltage operation at 250VAC and 125VDC, supporting both alternating and direct current applications within the specified voltage limits.