MDL-3-2/10-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The MDL-3-2/10-R is a 3.2 A, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for circuits requiring holder-based mounting in 3AB and 3AG configurations with 1/4" x 1-1/4" dimensions. The part is currently active in production with 726 pieces in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical form factors, and functional performance characteristics to support component procurement flexibility and supply chain continuity.

Substiute Parts

MDL-3-2/10-R

Eaton - Electronics DivisionIn Stock: 773MDL-3-2/10-R Datasheet

Current PartRFQ

BK/MDL-3-2/10-R

Eaton - Electronics DivisionIn Stock: 908BK/MDL-3-2/10-R Datasheet

Parametric EquivalentRFQ

BK/MDQ-3-2/10

Eaton - Electronics DivisionIn Stock: 976BK/MDQ-3-2/10 Datasheet

Parametric EquivalentRFQ

0034.5237

SCHURTER Inc.In Stock: 14720034.5237 Datasheet

Parametric EquivalentRFQ

031303.2HXP

Littelfuse Inc.In Stock: 1012031303.2HXP Datasheet

Parametric EquivalentRFQ

031303.2MXP

Littelfuse Inc.In Stock: 2300031303.2MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDL-3-2/10-R are qualified based on the following critical parameters:

Electrical Equivalence:

• Current Rating: 3.2 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)

Mechanical Compatibility:

• 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)
• Mounting Type: Requires Holder (exact match required)

Functional Characteristics:

• Fuse Type: Cartridge, Glass (exact match required)

All substitute parts listed below satisfy these criteria and are therefore electrically and mechanically interchangeable with the MDL-3-2/10-R in applications requiring 3.2 A, 250 V AC/DC slow-blow glass cartridge fuses in standard 3AB/3AG holder configurations.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Active Status, Full Compliance):

The BK/MDL-3-2/10-R and 031303.2MXP are recommended as primary substitutes for the MDL-3-2/10-R. Both parts are active in production, ROHS3 compliant, and carry full regulatory certifications. The 031303.2MXP offers the highest inventory availability (2215 pieces) and includes CSA, UL, CE, K-MARK, and PSE approvals. The BK/MDL-3-2/10-R maintains manufacturer continuity with Eaton - Electronics Division.

Secondary Selection (Active Status, Compliance Considerations):

The 031303.2HXP is an active Littelfuse equivalent with ROHS3 compliance and comprehensive regulatory approvals (CE, CSA, K-MARK, PSE, UL). This part is suitable for applications requiring certified slow-blow glass cartridge fuses.

Alternative Selection (Active Status, Compliance Limitations):

The BK/MDQ-3-2/10 is an active Eaton equivalent with full electrical and mechanical compatibility. However, this part is RoHS non-compliant and should be selected only when RoHS compliance is not a requirement.

Obsolete Status (Not Recommended for New Designs):

The 0034.5237 from SCHURTER Inc. is marked as obsolete. While electrically and mechanically equivalent with ROHS3 compliance, this part should not be selected for new designs or long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDL-3-2/10-R be used as a direct replacement for the MDL-3-2/10-R?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (3.2 A, 250 V AC), response time (slow blow), and mechanical form factor (3AB/3AG, 1/4" x 1-1/4"). The BK/MDL-3-2/10-R carries ROHS3 compliance compared to the standard RoHS compliance of the original part.

Q: What is the difference between the Littelfuse 031303.2HXP and 031303.2MXP?

A: Both parts are electrically and mechanically identical with matching 3.2 A, 250 V AC ratings and slow-blow response. Both are ROHS3 compliant and carry the same regulatory approvals. The primary difference is inventory availability, with the 031303.2MXP offering significantly higher stock (2215 pieces versus 967 pieces).

Q: Is the 0034.5237 suitable for new product designs?

A: The 0034.5237 is marked as obsolete and is not recommended for new designs. While it meets all electrical and mechanical requirements, obsolete status indicates discontinued manufacturing and limited future availability.

Q: Can I use the BK/MDQ-3-2/10 in applications requiring RoHS compliance?

A: No. The BK/MDQ-3-2/10 is RoHS non-compliant. For applications requiring RoHS compliance, select the BK/MDL-3-2/10-R, 031303.2HXP, 031303.2MXP, or 0034.5237.

Q: Are all substitute parts compatible with 3AB and 3AG holders?

A: Yes. All substitute parts listed share the identical package designation (3AB, 3AG, 1/4" x 1-1/4") and physical dimensions (0.250" Dia x 1.250" L). All are compatible with standard 3AB and 3AG holder configurations.

Q: What regulatory certifications are available for these fuses?

A: The Littelfuse parts (031303.2HXP and 031303.2MXP) carry the most comprehensive certifications: CE, CSA, K-MARK, PSE, and UL. The SCHURTER 0034.5237 carries CSA and UL approvals. Eaton parts do not list specific approval agencies in the provided data.