MDL-1-2/10-R Equivalent & Substitute Parts

Part Overview

The MDL-1-2/10-R is a 1.2 A, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring overcurrent protection in circuits rated up to 250 V AC. The part operates in a 3AB/3AG holder format with dimensions of 0.250" diameter by 1.250" length (6.35 mm × 31.75 mm). The MDL-1-2/10-R maintains Active product status and is RoHS Compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this fuse specification.

Substiute Parts

MDL-1-2/10-R

Eaton - Electronics DivisionIn Stock: 1117MDL-1-2/10-R Datasheet

Current PartRFQ

BK/MDL-1-2/10-R

Eaton - Electronics DivisionIn Stock: 1301BK/MDL-1-2/10-R Datasheet

Parametric EquivalentRFQ

031301.2MXP

Littelfuse Inc.In Stock: 1009031301.2MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDL-1-2/10-R are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Current Rating: 1.2 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)
• Mounting Type: Requires Holder (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)

All identified substitute parts meet these electrical and mechanical specifications. Substitutes are grouped by manufacturer and part number designation while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

BK/MDL-1-2/10-R (Eaton - Electronics Division)

The BK/MDL-1-2/10-R is a direct equivalent manufactured by Eaton - Electronics Division. This part maintains identical electrical and mechanical specifications to the MDL-1-2/10-R. The BK designation represents an alternative packaging or distribution variant within the Eaton product line. Both parts are Active status products with RoHS compliance. The BK/MDL-1-2/10-R carries ROHS3 Compliant status and REACH Unaffected designation, providing enhanced regulatory documentation. Current inventory availability is 1248 pieces.

031301.2MXP (Littelfuse Inc.)

The 031301.2MXP is a parametric equivalent manufactured by Littelfuse Inc. from the 313 series. This part meets all electrical and mechanical requirements for direct substitution. The 031301.2MXP provides additional technical specifications including Breaking Capacity of 100 A at rated voltage, Melting I²t of 21.5, and DC Cold Resistance of 0.278 Ohms. Approval agencies include CE, CSA, PSE, and UL certifications. Operating temperature range is specified as -55°C to 125°C. Current inventory availability is 976 pieces.

Both substitute parts are suitable for direct replacement based on matching electrical ratings, fuse type, response characteristics, and mechanical package specifications.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDL-1-2/10-R be used as a direct replacement for the MDL-1-2/10-R?

A: Yes. The BK/MDL-1-2/10-R is manufactured by the same company (Eaton - Electronics Division) and matches all critical electrical and mechanical parameters: 1.2 A current rating, 250 V AC voltage rating, slow-blow response, glass cartridge type, and 3AB/3AG holder compatibility with 0.250" × 1.250" dimensions.

Q: Can the 031301.2MXP (Littelfuse) be used as a direct replacement for the MDL-1-2/10-R (Eaton)?

A: Yes. The 031301.2MXP meets all required electrical and mechanical specifications: 1.2 A current rating, 250 V AC voltage rating, slow-blow response, glass cartridge type, and 3AB/3AG holder compatibility with identical dimensions. The part is manufactured by Littelfuse Inc., a different supplier, but maintains functional equivalence.

Q: What are the key parameters that determine if a fuse can substitute for the MDL-1-2/10-R?

A: Substitution requires exact matching of: current rating (1.2 A), AC voltage rating (250 V), fuse type (cartridge, glass), response time (slow blow), package designation (3AB, 3AG), and physical dimensions (0.250" diameter × 1.250" length). All three parts listed meet these criteria.

Q: Are there differences in regulatory compliance between the three parts?

A: The MDL-1-2/10-R is RoHS Compliant. The BK/MDL-1-2/10-R and 031301.2MXP are both ROHS3 Compliant and REACH Unaffected. The 031301.2MXP carries additional approval agency certifications (CE, CSA, PSE, UL) and specifies operating temperature range (-55°C to 125°C) and additional electrical characteristics (Breaking Capacity, Melting I²t, DC Cold Resistance).

Q: Do all three parts require the same holder?

A: Yes. All three parts are 3AB/3AG cartridge fuses with identical dimensions (0.250" diameter × 1.250" length) and require a compatible 3AB or 3AG fuse holder for installation.

Q: What is the difference between the MDL-1-2/10-R and BK/MDL-1-2/10-R designations?

A: Both are Eaton products with identical electrical and mechanical specifications. The BK prefix typically indicates a specific packaging, distribution channel, or product variant designation within Eaton's product line. Functionally, they are equivalent.

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

A: Selection between BK/MDL-1-2/10-R and 031301.2MXP depends on procurement requirements, supplier preference, and inventory availability. Both are Active status products meeting all electrical and mechanical specifications. The 031301.2MXP provides additional technical documentation including operating temperature range and approval certifications.