MDL-1-1/2-R Equivalent & Substitute Parts

Part Overview

The MDL-1-1/2-R is a 1.5 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in 3AB and 3AG fuse holders with dimensions of 0.250" diameter by 1.250" length (6.35mm x 31.75mm). The part maintains Active product status with 923 pieces currently in stock.

Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, supply chain considerations, or when parametric compatibility permits cross-manufacturer selection. The substitute parts listed maintain identical electrical ratings and mechanical form factors while originating from alternative manufacturers including Littelfuse Inc. and SCHURTER Inc.

Substiute Parts

MDL-1-1/2-R

Eaton - Electronics DivisionIn Stock: 942MDL-1-1/2-R Datasheet

Current PartRFQ

BK/MDL-1-1/2-R

Eaton - Electronics DivisionIn Stock: 1927BK/MDL-1-1/2-R Datasheet

DirectRFQ

BK/MDQ-1-1/2

Eaton - Electronics DivisionIn Stock: 762BK/MDQ-1-1/2 Datasheet

Parametric EquivalentRFQ

0034.5228

SCHURTER Inc.In Stock: 9500034.5228 Datasheet

Parametric EquivalentRFQ

031301.5HXP

Littelfuse Inc.In Stock: 1038031301.5HXP Datasheet

Parametric EquivalentRFQ

031301.5VXP

Littelfuse Inc.In Stock: 1150031301.5VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDL-1-1/2-R is determined by strict parametric matching across the following criteria:

Primary Matching Parameters:

• Current Rating: 1.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• 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)
• Breaking Capacity @ Rated Voltage: 100A (exact match required)

All substitute parts listed meet these primary matching parameters. Secondary parameters including DC Cold Resistance, Melting I²t, and approval agencies may vary within acceptable engineering tolerances but do not disqualify substitution eligibility when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Direct Equivalent): BK/MDL-1-1/2-R from Eaton - Electronics Division is the direct manufacturer equivalent to MDL-1-1/2-R. Both parts share identical electrical specifications, mechanical dimensions, and approval certifications (CE, CSA, UL). BK/MDL-1-1/2-R maintains Active product status with higher inventory availability (1903 pieces) and ROHS3 compliance. This part is suitable for direct substitution without design modification.

Secondary Selection (Parametric Equivalent - Eaton Series): BK/MDQ-1-1/2 from Eaton - Electronics Division meets all primary matching parameters and maintains Active product status. This part differs in DC Cold Resistance (0.27 Ohms versus 0.156 Ohms) and lacks CE approval certification. RoHS non-compliance status requires verification against application requirements before selection.

Tertiary Selection (Parametric Equivalent - Littelfuse Series 313): 031301.5HXP and 031301.5VXP from Littelfuse Inc. are parametrically equivalent alternatives with identical electrical ratings and mechanical form factors. Both parts maintain Active product status with expanded approval certifications including PSE. Melting I²t values (38 versus 22.7) and DC Cold Resistance (0.191 Ohms) differ from the primary part. ROHS3 compliance and REACH Unaffected status are confirmed. Operating temperature range (-55°C ~ 125°C) is specified for these parts.

Quaternary Selection (Parametric Equivalent - SCHURTER Series FST 6.3x32): 0034.5228 from SCHURTER Inc. meets all primary matching parameters but carries Obsolete product status. This part is not recommended for new designs or long-term applications. Melting I²t value (25) and operating temperature range (-55°C ~ 125°C) are specified. ROHS3 compliance and REACH Unaffected status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-1-1/2-R be used as a direct replacement for MDL-1-1/2-R?

A: Yes. BK/MDL-1-1/2-R is the direct manufacturer equivalent from Eaton - Electronics Division. All electrical ratings (1.5 A, 250 V AC), mechanical dimensions (0.250" Dia x 1.250" L), fuse type (Cartridge, Glass), response time (Slow Blow), and approval certifications (CE, CSA, UL) are identical. No design modification is required.

Q: What is the difference between MDL-1-1/2-R and BK/MDQ-1-1/2?

A: Both parts are manufactured by Eaton and share identical current rating (1.5 A), voltage rating (250 V), fuse type (Cartridge, Glass), response time (Slow Blow), and mechanical dimensions. The primary differences are: BK/MDQ-1-1/2 has higher DC Cold Resistance (0.27 Ohms versus 0.156 Ohms), lacks CE approval certification, and carries RoHS non-compliant status. Substitution requires verification of application compliance requirements.

Q: Are Littelfuse 031301.5HXP and 031301.5VXP interchangeable with MDL-1-1/2-R?

A: Both Littelfuse parts meet all primary matching parameters: 1.5 A current rating, 250 V voltage rating, Cartridge Glass fuse type, Slow Blow response time, and 0.250" Dia x 1.250" L dimensions. Both parts fit 3AB and 3AG holders. Secondary parameter differences include higher Melting I²t values (38 versus 22.7) and different DC Cold Resistance (0.191 Ohms versus 0.156 Ohms). These parts are parametrically equivalent and suitable for substitution in applications where the specified secondary parameters are acceptable.

Q: Why is 0034.5228 from SCHURTER not recommended?

A: While 0034.5228 meets all primary matching parameters, it carries Obsolete product status. Obsolete parts present supply chain risk and are not suitable for new designs or applications requiring long-term component availability. Active status alternatives are preferred.

Q: What fuse holder types are compatible with these parts?

A: All listed parts require 3AB or 3AG fuse holders. The mechanical form factor (0.250" diameter x 1.250" length) is standardized across all substitute parts. Verify that existing fuse holder equipment is rated for 3AB or 3AG compatibility before installation.

Q: Do all substitute parts have the same approval certifications?

A: No. MDL-1-1/2-R, BK/MDL-1-1/2-R, and Littelfuse parts (031301.5HXP, 031301.5VXP) carry CE certification. BK/MDQ-1-1/2 and 0034.5228 do not include CE approval. All parts carry CSA and UL certifications. Littelfuse parts include additional PSE certification. Verify approval requirements for your specific application before selection.

Q: What is the significance of RoHS compliance status differences?

A: MDL-1-1/2-R is RoHS Compliant. BK/MDL-1-1/2-R, 0034.5228, 031301.5HXP, and 031301.5VXP are ROHS3 Compliant. BK/MDQ-1-1/2 is RoHS non-compliant. Applications subject to RoHS regulations require selection of compliant parts. ROHS3 Compliant status meets current regulatory requirements.

Q: Are there inventory considerations for part selection?

A: Current inventory levels are: MDL-1-1/2-R (923 pieces), BK/MDL-1-1/2-R (1903 pieces), BK/MDQ-1-1/2 (715 pieces), 0034.5228 (842 pieces), 031301.5HXP (991 pieces), and 031301.5VXP (1088 pieces). BK/MDL-1-1/2-R offers the highest availability. Inventory levels are subject to change and should be verified at time of procurement.