MDL-V-4-R Equivalent & Substitute Parts Reference

Part Overview

The MDL-V-4-R is a 4 A 250 V AC/DC slow blow glass cartridge fuse manufactured by Eaton - Electronics Division. This through-hole component features a 3AB/3AG package format with dimensions of 1/4" x 1-1/4" (6.76mm x 32.82mm). The part maintains Active product status with 1113 units currently in stock. Alternative equivalent parts are necessary to ensure design flexibility, supply chain continuity, and component availability across different procurement channels.

Substiute Parts

MDL-V-4-R

Eaton - Electronics DivisionIn Stock: 1153MDL-V-4-R Datasheet

Current PartRFQ

BK/MDL-V-4-R

Eaton - Electronics DivisionIn Stock: 1028BK/MDL-V-4-R Datasheet

DirectRFQ

0315004.HXP

Littelfuse Inc.In Stock: 11660315004.HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDL-V-4-R are classified based on strict electrical and mechanical parameter alignment. The substitution logic is determined by the following critical parameters:

Electrical Parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 200 A (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)

Compliance Parameters:

• Approval Agency: CE, CSA, UL certifications (minimum requirement)
• RoHS Status: RoHS Compliant (minimum requirement)

Parts meeting all electrical, mechanical, and compliance criteria are classified as direct equivalents. Parts with minor dimensional or resistance variations but identical functional parameters are classified as compatible substitutes.

Parameter Comparison

Engineering Selection Recommendations

BK/MDL-V-4-R (Eaton - Electronics Division): This part is a direct manufacturer equivalent to MDL-V-4-R. Both parts are manufactured by Eaton - Electronics Division and share identical electrical specifications, mechanical dimensions, and resistance characteristics. The BK/MDL-V-4-R maintains the same 4 A current rating, 250 V AC voltage rating, slow blow response time, and 200 A breaking capacity. Certifications include CE, CSA, and UL compliance. RoHS compliance is confirmed. This substitute provides seamless interchangeability with 965 units in current inventory.

0315004.HXP (Littelfuse Inc.): This part is a compatible substitute manufactured by Littelfuse Inc. It meets all critical electrical parameters: 4 A current rating, 250 V AC voltage rating, slow blow response time, and 200 A breaking capacity. The fuse type, package format (3AB/3AG), and mounting type (through hole) are identical. Dimensional variations exist: the Littelfuse part measures 0.275" Dia x 1.275" L compared to 0.266" Dia x 1.292" L for the Eaton part. DC cold resistance differs at 0.0311 Ohms versus 0.038 Ohms. Melting I²t is 76.1 compared to 19.3. Certifications include CE, CSA, K-MARK, PSE, and UL. RoHS3 compliance is confirmed. This substitute is suitable for applications where cross-manufacturer sourcing is acceptable and dimensional tolerances permit the specified variations. Inventory availability is 1074 units.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical specifications, mechanical dimensions, DC cold resistance, and melting I²t values. They are functionally equivalent with no performance differences.

Q: What are the key differences between the Eaton MDL-V-4-R and the Littelfuse 0315004.HXP?

A: Both parts share identical electrical ratings (4 A, 250 V AC, slow blow, 200 A breaking capacity) and package format (3AB/3AG, through hole). Differences include: diameter (0.266" vs 0.275"), length (1.292" vs 1.275"), DC cold resistance (0.038 Ohms vs 0.0311 Ohms), and melting I²t (19.3 vs 76.1). The Littelfuse part carries additional certifications (K-MARK, PSE) and ROHS3 compliance.

Q: Are dimensional variations between MDL-V-4-R and 0315004.HXP significant for PCB mounting?

A: Dimensional differences are minor (0.009" diameter increase, 0.017" length decrease). Compatibility depends on specific PCB footprint design and holder specifications. Verify that the fuse holder accommodates the 0.275" diameter specification of the Littelfuse part.

Q: Do all three parts meet the same regulatory certifications?

A: All three parts hold CE, CSA, and UL certifications. The Littelfuse 0315004.HXP additionally carries K-MARK and PSE certifications. All parts are RoHS compliant (RoHS or ROHS3).

Q: What is the significance of the melting I²t difference between Eaton and Littelfuse parts?

A: Melting I²t (19.3 vs 76.1) indicates the thermal energy required to melt the fuse element. The Littelfuse part requires greater thermal energy. This difference reflects different fuse element designs but does not affect the 4 A current rating or slow blow response time classification. Both parts operate within the same electrical parameters.

Q: Which substitute should be selected for new designs?

A: For designs requiring Eaton components, use BK/MDL-V-4-R as the direct equivalent. For designs permitting cross-manufacturer sourcing, 0315004.HXP is a compatible substitute with confirmed electrical equivalence. Selection should account for PCB holder specifications, dimensional tolerances, and supply chain preferences.