MDL-2-1/4-R Equivalent & Substitute Parts

Part Overview

The MDL-2-1/4-R is a 2.25 A, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring circuit protection in 3AB and 3AG holder configurations with a 1/4" x 1-1/4" form factor. The part is currently active in production with 706 units in stock. Equivalent and substitute parts are necessary to address supply chain continuity, alternative sourcing options, and compatibility with different holder systems while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

MDL-2-1/4-R

Eaton - Electronics DivisionIn Stock: 754MDL-2-1/4-R Datasheet

Current PartRFQ

BK/MDL-2-1/4-R

Eaton - Electronics DivisionIn Stock: 970BK/MDL-2-1/4-R Datasheet

DirectRFQ

0034.5232

SCHURTER Inc.In Stock: 11510034.5232 Datasheet

Parametric EquivalentRFQ

03132.25HXP

Littelfuse Inc.In Stock: 772303132.25HXP Datasheet

Parametric EquivalentRFQ

03132.25MXP

Littelfuse Inc.In Stock: 266803132.25MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDL-2-1/4-R is determined by strict equivalence across the following parameters:

Critical Substitution Parameters:

• Current Rating: 2.25 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: 100 A (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed maintain identical values across these critical parameters, ensuring direct functional and mechanical interchangeability. Variations in secondary parameters such as melting I²t, DC cold resistance, operating temperature range, and approval agency certifications do not affect substitution eligibility but may influence selection based on application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Active Status, Full Compliance):

The BK/MDL-2-1/4-R represents the direct equivalent from Eaton - Electronics Division. This part maintains identical electrical and mechanical specifications to the MDL-2-1/4-R while offering ROHS3 compliance and higher inventory availability (906 units). Selection of BK/MDL-2-1/4-R is appropriate for applications requiring continuity with the original Eaton product line.

The 03132.25HXP and 03132.25MXP from Littelfuse Inc. are active production parts offering the broadest approval agency coverage (CE, CSA, K-MARK, PSE, UL) and the highest inventory levels (7649 and 2581 units respectively). Both parts are ROHS3 compliant and suitable for applications requiring international regulatory compliance. The 03132.25HXP variant provides superior inventory depth for high-volume requirements.

Secondary Selection (Obsolete Status):

The 0034.5232 from SCHURTER Inc. is classified as obsolete and should be selected only when existing system documentation or holder compatibility specifically requires SCHURTER components. This part maintains all critical electrical and mechanical parameters but carries CSA and UL approvals only (no CE marking).

Compliance Considerations:

All substitute parts are RoHS3 compliant and REACH unaffected. Applications requiring CE marking should prioritize MDL-2-1/4-R, BK/MDL-2-1/4-R, 03132.25HXP, or 03132.25MXP. Applications requiring K-MARK or PSE certifications should select 03132.25HXP or 03132.25MXP from Littelfuse.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDL-2-1/4-R be used as a direct replacement for the MDL-2-1/4-R?

A: Yes. The BK/MDL-2-1/4-R is a direct equivalent manufactured by Eaton - Electronics Division with identical current rating (2.25 A), voltage rating (250 V), fuse type (cartridge, glass), response time (slow blow), package configuration (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). Both parts are compatible with the same holder systems.

Q: What is the difference between the Littelfuse 03132.25HXP and 03132.25MXP?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The primary difference is inventory availability: 03132.25HXP has 7649 units in stock, while 03132.25MXP has 2581 units. Both are active production parts with ROHS3 compliance and identical approval agency certifications (CE, CSA, K-MARK, PSE, UL).

Q: Why is the SCHURTER 0034.5232 listed as obsolete?

A: The 0034.5232 is classified as obsolete by SCHURTER Inc., indicating it is no longer in active production. However, it maintains all critical electrical and mechanical parameters required for substitution. This part should be selected only when system documentation or existing holder compatibility specifically requires SCHURTER components or when new inventory from alternative sources is available.

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

A: Yes. All substitute parts listed maintain the 3AB, 3AG package configuration and 0.250" Dia x 1.250" L physical dimensions, ensuring mechanical compatibility with existing holder systems designed for the MDL-2-1/4-R.

Q: Which substitute part offers the best regulatory compliance coverage?

A: The Littelfuse 03132.25HXP and 03132.25MXP offer the broadest approval agency coverage with CE, CSA, K-MARK, PSE, and UL certifications. These parts are suitable for applications requiring international regulatory compliance across multiple markets.

Q: Can I use these fuses in both AC and DC applications?

A: Yes. All parts listed are rated for 250 V AC/DC operation, supporting both alternating and direct current applications within the specified voltage and current parameters.

Q: What is the significance of the melting I²t parameter differences?

A: The melting I²t values vary among manufacturers (MDL-2-1/4-R: 49.6, SCHURTER 0034.5232: 50.5, Littelfuse 03132.25HXP and 03132.25MXP: 121). These differences reflect manufacturer-specific thermal characteristics but do not affect substitution eligibility. All parts maintain the same 2.25 A current rating and slow-blow response time classification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts are ROHS3 compliant. The MDL-2-1/4-R is RoHS compliant, while BK/MDL-2-1/4-R, 0034.5232, 03132.25HXP, and 03132.25MXP are all ROHS3 compliant.