Equivalent & Substitute Parts for MDA-1/32-R Ceramic Fuse

Part Overview

The MDA-1/32-R is a 32 mA ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 250 V AC/DC operation. This component is classified as obsolete, necessitating identification of active substitute parts that maintain electrical and mechanical compatibility. The fuse requires a 3AB or 3AG holder and is housed in a 1/4" x 1-1/4" form factor. Substitute parts must satisfy identical voltage ratings, package dimensions, and mounting requirements to ensure direct replacement capability.

Substiute Parts

MDA-1/32-R

Eaton - Electronics DivisionIn Stock: 707MDA-1/32-R Datasheet

Current PartRFQ

0326.031HXP

Littelfuse Inc.In Stock: 8220326.031HXP Datasheet

SimilarRFQ

0326.031MXP

Littelfuse Inc.In Stock: 6710326.031MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDA-1/32-R is based on the following criteria:

Electrical Compatibility:

• Voltage rating must equal 250 V AC/DC
• Current rating tolerance: 31 mA substitutes are acceptable for 32 mA applications within standard fuse rating tolerances
• Response time classification must remain Slow Blow

Mechanical Compatibility:

• Package designation must be 3AB or 3AG
• Physical dimensions must be 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting type must require the same holder configuration

Substitute Parts Identified:

• Littelfuse 0326.031HXP
• Littelfuse 0326.031MXP

Both substitute parts are manufactured by Littelfuse Inc., carry active product status, and meet all specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse substitute parts (0326.031HXP and 0326.031MXP) satisfy the electrical and mechanical requirements for direct replacement of the obsolete MDA-1/32-R fuse. Selection between the two Littelfuse options is based on packaging availability:

• 0326.031HXP: Available in bulk packaging, 775 units in stock
• 0326.031MXP: Available in bulk packaging, 611 units in stock

Both parts carry CE approval and ROHS3 compliance, meeting current regulatory standards. The 31 mA current rating of the substitutes falls within acceptable tolerance for 32 mA applications in ceramic fuse cartridge technology. Operating temperature range (-55°C ~ 125°C) and breaking capacity (100 A) specifications are provided for the Littelfuse parts, offering enhanced documentation compared to the original MDA-1/32-R.

Frequently Asked Questions (FAQ)

Q: Can a 31 mA fuse replace a 32 mA fuse? A: Yes. In ceramic fuse cartridge technology, a 1 mA difference falls within standard manufacturing tolerances and is acceptable for direct substitution when all other electrical parameters (voltage, response time) and mechanical parameters (package, dimensions) are identical.

Q: Are the Littelfuse 0326.031HXP and 0326.031MXP interchangeable? A: Yes. Both parts are electrically and mechanically identical. They differ only in packaging designation (HXP vs. MXP variants). Selection should be based on inventory availability and internal part numbering systems.

Q: Will these substitutes fit in the existing 3AB/3AG holder? A: Yes. Both substitute parts maintain the identical 0.250" Dia x 1.250" L (6.35mm x 31.75mm) form factor and are designated for 3AB and 3AG holders, ensuring mechanical compatibility without modification.

Q: What is the significance of the CE approval on the substitute parts? A: CE approval indicates compliance with European Union safety and performance standards. This certification is not specified for the original MDA-1/32-R but is present on the active Littelfuse substitutes, providing enhanced regulatory documentation.

Q: Are there any temperature operating differences between the main part and substitutes? A: The original MDA-1/32-R does not specify an operating temperature range. The Littelfuse substitutes are rated for -55°C ~ 125°C operation, providing documented thermal performance specifications for the replacement components.