Equivalent & Substitute Parts for BK/MDQ-6 Glass Cartridge Fuse

Part Overview

The BK/MDQ-6 is a 6 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 1/4" x 1-1/4" (6.35 mm x 31.75 mm). The part maintains Active product status and is currently in stock with 988 pieces available. Glass cartridge fuses of this specification are essential protective devices in electrical circuits where overcurrent protection and controlled response characteristics are required. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and access to components with enhanced compliance certifications when needed.

Substiute Parts

BK/MDQ-6

Eaton - Electronics DivisionIn Stock: 1002BK/MDQ-6 Datasheet

Current PartRFQ

BK/MDL-6-R

Eaton - Electronics DivisionIn Stock: 3348BK/MDL-6-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDQ-6 fuse is determined by strict equivalence across the following critical parameters:

• Current Rating: 6 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 for holder compatibility)
• Breaking Capacity @ Rated Voltage: 200 A (exact match required)

The substitute part BK/MDL-6-R meets all these criteria and is therefore classified as a parametric equivalent. Both parts are manufactured by Eaton - Electronics Division and share identical electrical and mechanical specifications within the allowed parameters for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both BK/MDQ-6 and BK/MDL-6-R are Active status products manufactured by Eaton - Electronics Division and are electrically and mechanically equivalent for 6 A, 250 V AC/DC slow-blow cartridge fuse applications in 3AB and 3AG holders.

The BK/MDL-6-R substitute offers expanded regulatory compliance with CE certification in addition to CSA and UL approvals. The BK/MDL-6-R also carries ROHS3 compliance status, whereas the BK/MDQ-6 is RoHS non-compliant. Both parts maintain REACH Unaffected status and identical MSL ratings.

Selection between these parts should be based on specific regulatory requirements and compliance mandates applicable to the end application. Where RoHS3 compliance is required, the BK/MDL-6-R is the appropriate selection. Where RoHS compliance is not a constraint, either part is suitable based on availability and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-6-R be used as a direct replacement for BK/MDQ-6?

A: Yes. Both parts are parametric equivalents with identical current rating (6 A), voltage rating (250 V AC), fuse type (Cartridge, Glass), response time (Slow Blow), package specification (3AB, 3AG, 1/4" x 1-1/4"), and breaking capacity (200 A). They are mechanically and electrically interchangeable in applications using 3AB or 3AG fuse holders.

Q: What is the difference in DC Cold Resistance between these parts?

A: The BK/MDQ-6 has a DC Cold Resistance of 0.01715 Ohms, while the BK/MDL-6-R has 0.022 Ohms. This difference does not affect substitution eligibility, as both values fall within acceptable operating parameters for this fuse category.

Q: Does BK/MDL-6-R have additional certifications?

A: Yes. The BK/MDL-6-R includes CE certification in addition to CSA and UL approvals held by the BK/MDQ-6. The BK/MDL-6-R also carries ROHS3 compliance, whereas the BK/MDQ-6 is RoHS non-compliant.

Q: Are both parts compatible with the same fuse holders?

A: Yes. Both parts use the 3AB and 3AG package specification with identical dimensions of 0.250" Dia x 1.250" L (6.35 mm x 31.75 mm). They are fully compatible with holders designed for this package type.

Q: What is the Melting I²t value for BK/MDL-6-R?

A: The Melting I²t for BK/MDL-6-R is 37.4. This parameter was not provided for the BK/MDQ-6 in the available data.