BK/MDQ-V-1/2 Equivalent & Substitute Parts

Part Overview

The BK/MDQ-V-1/2 is a 500 mA, 250 V AC/DC slow-blow glass cartridge fuse in 3AB/3AG package format with through-hole mounting. Manufactured by Eaton - Electronics Division, this component is classified as Active product status with 1093 pieces currently in stock. The fuse is designed for circuit protection applications requiring slow-blow response characteristics and is approved by CSA and UL agencies. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate alternative sourcing when the primary part becomes unavailable or when design revisions require updated compliance certifications.

Substiute Parts

BK/MDQ-V-1/2

Eaton - Electronics DivisionIn Stock: 1107BK/MDQ-V-1/2 Datasheet

Current PartRFQ

BK/MDL-V-1/2-R

Eaton - Electronics DivisionIn Stock: 1167BK/MDL-V-1/2-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDQ-V-1/2 with the BK/MDL-V-1/2-R is valid based on the following matching parameters:

Electrical Compatibility:

• Current Rating: 500 mA (identical)
• Voltage Rating (AC): 250 V (identical)
• Response Time: Slow Blow (identical)
• Breaking Capacity @ Rated Voltage: 35A (identical)

Mechanical Compatibility:

• Fuse Type: Cartridge, Glass (identical)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (identical)
• Mounting Type: Through Hole (identical)
• Size / Dimension: 0.266" Dia x 1.292" L (6.76mm x 32.82mm) (identical)

Regulatory Compliance:

• Both parts are Active product status
• Both parts carry ECCN EAR99 and HTSUS 8536.10.0020 classifications

The BK/MDL-V-1/2-R represents a parametric equivalent within the Eaton MDL series, maintaining all critical electrical and mechanical specifications required for direct substitution in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (BK/MDQ-V-1/2): Select the BK/MDQ-V-1/2 when existing designs are qualified to CSA and UL certifications and RoHS compliance is not a design requirement. This part maintains established supply availability with 1093 units in stock.

Substitute Part Selection (BK/MDL-V-1/2-R): Select the BK/MDL-V-1/2-R when designs require RoHS compliance or when CE certification is mandated by regional regulatory requirements. The MDL series substitute provides expanded approval agency coverage (CE, CSA, UL) and maintains full electrical and mechanical compatibility. The substitute carries 1145 units in stock, supporting consistent supply chain availability.

Compliance Consideration: The BK/MDL-V-1/2-R is RoHS Compliant, whereas the BK/MDQ-V-1/2 is RoHS non-compliant. This distinction is material for applications subject to RoHS directives or customer specifications requiring RoHS-compliant components.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts share identical electrical ratings (500 mA, 250 V AC), response characteristics (Slow Blow), mechanical dimensions (0.266" Dia x 1.292" L), and package format (3AB, 3AG through-hole). Physical installation and electrical performance are equivalent.

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

A: The BK/MDQ-V-1/2 has a DC Cold Resistance of 1.4 Ohms, while the BK/MDL-V-1/2-R measures 0.943 Ohms. Both values fall within acceptable ranges for slow-blow cartridge fuses and do not affect substitution compatibility for standard circuit protection applications.

Q: Why does the BK/MDL-V-1/2-R have additional certifications?

A: The BK/MDL-V-1/2-R carries CE certification in addition to CSA and UL approvals. This expanded certification profile supports applications requiring compliance with European regulatory frameworks or customer specifications mandating multi-regional approval.

Q: Is RoHS compliance a factor in selecting between these parts?

A: RoHS compliance becomes a selection factor only when design specifications or customer requirements explicitly mandate RoHS-compliant components. The BK/MDL-V-1/2-R is RoHS Compliant, while the BK/MDQ-V-1/2 is RoHS non-compliant. For applications without RoHS requirements, both parts are functionally equivalent.

Q: Are both parts available in equivalent quantities?

A: Yes. The BK/MDQ-V-1/2 has 1093 pieces in stock, and the BK/MDL-V-1/2-R has 1145 pieces in stock. Both maintain active inventory status supporting immediate procurement.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. Identical through-hole mounting specifications, package dimensions (3AB, 3AG, 1/4" x 1-1/4"), and axial orientation allow direct PCB footprint compatibility without design modification.