MDL-3-1/2-R Equivalent & Substitute Parts

Part Overview

The MDL-3-1/2-R is a 3.5 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as Active product status and is designed for use in fuse holders compatible with 3AB and 3AG standards. The physical form factor is 1/4" diameter by 1-1/4" length (6.35mm x 31.75mm). Identifying equivalent and substitute parts is necessary to ensure supply chain continuity, manage inventory across multiple procurement channels, and maintain compliance with applicable regulatory standards while preserving circuit protection performance.

Substiute Parts

MDL-3-1/2-R

Eaton - Electronics DivisionIn Stock: 1040MDL-3-1/2-R Datasheet

Current PartRFQ

BK/MDL-3-1/2-R

Eaton - Electronics DivisionIn Stock: 940BK/MDL-3-1/2-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDL-3-1/2-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 3.5 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)
• Mounting Type: Requires Holder (exact match required)

The substitute part BK/MDL-3-1/2-R meets all critical electrical and mechanical parameters. Both parts are manufactured by Eaton - Electronics Division and share identical functional specifications. The primary distinction lies in packaging designation and regulatory compliance documentation.

Parameter Comparison

Engineering Selection Recommendations

Both MDL-3-1/2-R and BK/MDL-3-1/2-R are Active status products from Eaton - Electronics Division with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

MDL-3-1/2-R carries CE, CSA, and UL approval agency certifications. This part is suitable for applications requiring these specific regulatory approvals.

BK/MDL-3-1/2-R is ROHS3 Compliant with REACH Unaffected status and MSL rating of 1 (Unlimited). This variant is suitable for applications with extended storage requirements and enhanced environmental compliance documentation.

Both parts are electrically and mechanically interchangeable within circuits designed for 3.5 A, 250 V AC/DC slow-blow protection using 3AB/3AG holder standards. Selection should align with specific regulatory requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-3-1/2-R be used as a direct replacement for MDL-3-1/2-R?

A: Yes. Both parts share identical current rating (3.5 A), voltage rating (250 V AC), fuse type (Cartridge, Glass), response time (Slow Blow), package designation (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). They are mechanically and electrically interchangeable.

Q: What is the difference between MDL-3-1/2-R and BK/MDL-3-1/2-R?

A: The primary differences are packaging designation (BK prefix) and regulatory compliance documentation. MDL-3-1/2-R carries CE, CSA, and UL certifications. BK/MDL-3-1/2-R is ROHS3 Compliant with REACH Unaffected status and MSL 1 (Unlimited) rating. Both are manufactured by Eaton - Electronics Division with identical electrical and mechanical performance.

Q: Are these fuses compatible with standard 3AB and 3AG fuse holders?

A: Yes. Both MDL-3-1/2-R and BK/MDL-3-1/2-R are designed for use in holders compatible with 3AB and 3AG standards and feature the standard 1/4" x 1-1/4" form factor.

Q: What does "Slow Blow" response time mean?

A: Slow Blow indicates the fuse has a delayed response to overcurrent conditions. This characteristic allows temporary inrush currents to pass without nuisance operation while still providing protection against sustained overcurrent conditions.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. Both parts are rated for 250 V AC/DC operation, making them suitable for use in alternating current and direct current applications within the specified voltage range.