Equivalent & Substitute Parts for MDL-V-3/4-R

Part Overview

The MDL-V-3/4-R is a 750 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for through-hole mounting in 3AB and 3AG package configurations with dimensions of 1/4" x 1-1/4" (6.76mm x 32.82mm). The product maintains active status and is RoHS compliant. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory approvals align with the original specification, enabling direct replacement in circuit protection applications.

Substiute Parts

MDL-V-3/4-R

Eaton - Electronics DivisionIn Stock: 935MDL-V-3/4-R Datasheet

Current PartRFQ

BK/MDL-V-3/4-R

Eaton - Electronics DivisionIn Stock: 1139BK/MDL-V-3/4-R Datasheet

DirectRFQ

0315.750HXP

Littelfuse Inc.In Stock: 8110315.750HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDL-V-3/4-R are classified based on strict equivalence of electrical and mechanical parameters. The substitution logic is determined by the following criteria:

Primary Equivalence Criteria:

• Current Rating: 750 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 35A (exact match required)
• Approval Agencies: CE, CSA, UL (all certifications present)

Direct Manufacturer Substitute: BK/MDL-V-3/4-R meets all primary equivalence criteria and is manufactured by the same supplier (Eaton - Electronics Division).

Similar Manufacturer Substitute: 0315.750HXP meets all primary equivalence criteria and is manufactured by Littelfuse Inc., an alternative qualified supplier.

Parameter Comparison

Engineering Selection Recommendations

MDL-V-3/4-R (Primary Part): This Eaton fuse is the original specification component. It maintains active product status, holds CE, CSA, and UL certifications, and is RoHS compliant. Current inventory is 840 pieces.

BK/MDL-V-3/4-R (Direct Manufacturer Substitute): This Eaton variant is electrically and mechanically identical to the MDL-V-3/4-R. Both DC cold resistance (0.397 Ohms) and melting I²t (4.343) values are identical. Physical dimensions match exactly. All regulatory approvals are equivalent. This part is sourced from the same manufacturer and represents a direct replacement. Current inventory is 1046 pieces.

0315.750HXP (Similar Manufacturer Substitute): This Littelfuse fuse meets all primary electrical and mechanical equivalence criteria. It carries identical current rating, voltage rating, response time, fuse type, package configuration, mounting type, and breaking capacity. All required certifications (CE, CSA, UL) are present. The part is ROHS3 compliant and specifies an operating temperature range of -55°C to 125°C. Physical dimensions show minor variation (0.275" Dia x 1.275" L versus 0.266" Dia x 1.292" L), which remains within 3AB and 3AG package specifications. DC cold resistance (0.6215 Ohms) and melting I²t (7.16) differ from the Eaton parts, reflecting manufacturer-specific design characteristics while maintaining functional equivalence for the 750 mA, 250 V slow-blow application. Current inventory is 779 pieces.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-V-3/4-R be used as a direct replacement for MDL-V-3/4-R?

A: Yes. BK/MDL-V-3/4-R is manufactured by Eaton - Electronics Division and matches the MDL-V-3/4-R in all electrical parameters (750 mA, 250 V AC, slow-blow response), mechanical specifications (3AB, 3AG package, 1/4" x 1-1/4" dimensions), and regulatory certifications (CE, CSA, UL). DC cold resistance and melting I²t values are identical.

Q: Is the Littelfuse 0315.750HXP compatible with circuits designed for MDL-V-3/4-R?

A: Yes. The 0315.750HXP meets all primary equivalence criteria: 750 mA current rating, 250 V AC voltage rating, slow-blow response time, cartridge glass fuse type, 3AB/3AG package configuration, through-hole mounting, and 35A breaking capacity. All required certifications (CE, CSA, UL) are present. Physical dimensions remain within package specifications despite minor variations.

Q: What are the differences between the Eaton and Littelfuse fuses?

A: The primary differences are manufacturer-specific design parameters. DC cold resistance is 0.397 Ohms for Eaton parts versus 0.6215 Ohms for the Littelfuse part. Melting I²t is 4.343 for Eaton versus 7.16 for Littelfuse. Physical dimensions show minor variation: Eaton measures 0.266" Dia x 1.292" L while Littelfuse measures 0.275" Dia x 1.275" L. The Littelfuse part specifies an operating temperature range of -55°C to 125°C. All parts are functionally equivalent for 750 mA, 250 V slow-blow circuit protection.

Q: Are all substitute parts RoHS compliant?

A: Yes. MDL-V-3/4-R and BK/MDL-V-3/4-R are RoHS compliant. The 0315.750HXP is ROHS3 compliant, which represents an updated RoHS standard.

Q: Do the physical dimension variations affect mechanical fit?

A: The 0315.750HXP dimensions (0.275" Dia x 1.275" L) differ slightly from the Eaton parts (0.266" Dia x 1.292" L). Both remain within 3AB and 3AG package specifications. Verify mechanical fit in the specific fuse holder or socket design before installation.

Q: Which substitute part should be selected for new designs?

A: Selection depends on supplier availability and design requirements. BK/MDL-V-3/4-R provides identical electrical and mechanical characteristics from the original manufacturer. The 0315.750HXP offers an alternative from a qualified supplier with equivalent functional performance and broader operating temperature specification.