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

Part Overview

The BK/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 holder-based mounting in 3AB and 3AG standard configurations with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part maintains Active product status with 1248 units in current inventory. Equivalent substitute parts are identified to support procurement flexibility, supply chain continuity, and design standardization across compatible applications.

Substiute Parts

BK/MDL-1-2/10-R

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

Current PartRFQ

031301.2MXP

Littelfuse Inc.In Stock: 1009031301.2MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDL-1-2/10-R is determined by strict equivalence across the following critical 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)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part 031301.2MXP from Littelfuse Inc. meets all mandatory electrical and mechanical parameters, enabling direct functional replacement in holder-based circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the BK/MDL-1-2/10-R and 031301.2MXP maintain Active product status with full inventory availability. Both parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component procurement. The Littelfuse 031301.2MXP substitute carries additional approval certifications (CE, CSA, PSE, UL) and provides supplementary technical data including breaking capacity, melting I²t, operating temperature range, and DC cold resistance. Selection between these parts should be based on procurement availability, lead time requirements, and any design-specific certification mandates.

Frequently Asked Questions (FAQ)

Q: Can the 031301.2MXP directly replace the BK/MDL-1-2/10-R in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: 1.2 A current rating, 250 V AC voltage rating, slow-blow response, glass cartridge construction, and 3AB/3AG holder compatibility with identical 1/4" x 1-1/4" dimensions.

Q: Are there any holder compatibility differences between these fuses?

A: No. Both fuses require the same 3AB and 3AG holder types and are physically identical in size and configuration (0.250" Dia x 1.250" L).

Q: Do both parts meet the same regulatory compliance standards?

A: Both parts are ROHS3 Compliant and REACH Unaffected. The Littelfuse 031301.2MXP carries additional approvals (CE, CSA, PSE, UL) beyond the base requirements.

Q: What is the difference in response time between these fuses?

A: There is no difference. Both are classified as slow-blow fuses, providing identical protection characteristics for inrush current applications.

Q: Can I mix these fuse types in the same circuit or equipment?

A: Yes, provided the application design permits component substitution. Both fuses deliver equivalent electrical performance and mechanical fit within standard 3AB/3AG holders.