BK/MDL-1/10 Equivalent & Substitute Parts

Part Overview

The BK/MDL-1/10 is a 100 mA, 250 V AC/DC glass cartridge fuse with 3AB/3AG form factor and 1/4" x 1-1/4" dimensions. This fuse requires a compatible holder for installation and provides slow-blow response characteristics. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing system support and new designs. Direct manufacturer alternatives and parametric equivalents from Eaton and Littelfuse are available to maintain circuit protection functionality.

Substiute Parts

BK/MDL-1/10

Eaton - Electronics DivisionIn Stock: 1017BK/MDL-1/10 Datasheet

Current PartRFQ

BK/MDL-1/10-R

Eaton - Electronics DivisionIn Stock: 1204BK/MDL-1/10-R Datasheet

DirectRFQ

MDL-1/10-R

Eaton - Electronics DivisionIn Stock: 1038MDL-1/10-R Datasheet

DirectRFQ

MDQ-1/10

Eaton - Electronics DivisionIn Stock: 778MDQ-1/10 Datasheet

Parametric EquivalentRFQ

0313.100HXP

Littelfuse Inc.In Stock: 10630313.100HXP Datasheet

Parametric EquivalentRFQ

0313.100MXP

LittelfuseIn Stock: 24110313.100MXP Datasheet

Parametric EquivalentRFQ

0313.100VXP

Littelfuse Inc.In Stock: 8810313.100VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDL-1/10 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 100 mA
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Breaking Capacity @ Rated Voltage: 35 A
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

All substitute parts listed maintain these electrical and mechanical parameters. Variations in secondary characteristics such as DC cold resistance, melting I²t, RoHS compliance status, and approval agencies do not affect functional substitution within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Substitutes (Eaton - Electronics Division):

BK/MDL-1/10-R and MDL-1/10-R are the primary alternatives to the obsolete BK/MDL-1/10. Both parts are active products from the same manufacturer with identical electrical and mechanical specifications. BK/MDL-1/10-R includes CE certification in addition to CSA and UL approvals, and carries ROHS3 compliance. MDL-1/10-R maintains RoHS compliance status. Both are suitable for direct replacement in existing designs.

Parametric Equivalent (Eaton - Electronics Division):

MDQ-1/10 is a parametric equivalent from Eaton's MDQ series. It maintains all critical electrical and mechanical parameters and holds active product status with CSA and UL certifications. This part is suitable for applications where series designation is not a constraint.

Cross-Manufacturer Parametric Equivalents (Littelfuse):

0313.100HXP, 0313.100MXP, and 0313.100VXP are parametric equivalents from Littelfuse's 313 series. All three parts maintain identical electrical and mechanical specifications with active product status, CE/CSA/UL certifications, and ROHS3 compliance. These parts are suitable for applications requiring cross-manufacturer sourcing flexibility.

Selection between substitute parts should be based on supply chain requirements, certification scope, and RoHS compliance mandates for the end application.

Frequently Asked Questions (FAQ)

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

A: Yes. BK/MDL-1/10-R is a direct manufacturer substitute with identical electrical and mechanical parameters. The primary differences are product status (active versus obsolete) and enhanced certifications (addition of CE marking). Both parts are compatible with 3AB/3AG holders and provide equivalent circuit protection.

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

A: Both parts are Eaton products with identical electrical and mechanical specifications. The primary distinction is the part number prefix. BK/MDL-1/10-R includes ROHS3 compliance, while MDL-1/10-R carries RoHS compliance. Both are active products suitable for replacement applications.

Q: Are Littelfuse 0313 series fuses compatible with Eaton MDL series holders?

A: Yes. The Littelfuse 0313.100HXP, 0313.100MXP, and 0313.100VXP parts maintain the same 3AB/3AG package designation and 1/4" x 1-1/4" physical dimensions as the Eaton parts. They are mechanically and electrically compatible with the same holder systems.

Q: What does "Slow Blow" response time mean for this fuse?

A: Slow Blow response indicates the fuse is designed to tolerate temporary inrush currents without nuisance operation while still providing protection against sustained overcurrent conditions. All substitute parts listed maintain this response characteristic.

Q: Does the DC cold resistance variation between parts affect substitution?

A: DC cold resistance values vary among the substitute parts (ranging from 15.68 Ohms to 43 Ohms) but do not affect functional substitution. All parts meet the specified electrical and mechanical parameters for circuit protection. The resistance variation reflects different internal construction but does not impact performance within the defined application parameters.

Q: Are all substitute parts RoHS compliant?

A: The original BK/MDL-1/10 is RoHS non-compliant. Active substitutes vary in compliance status: BK/MDL-1/10-R and all Littelfuse 0313 series parts are ROHS3 compliant. MDL-1/10-R carries RoHS compliance. MDQ-1/10 compliance status is not specified. Compliance requirements should be verified against end-application mandates.

Q: Can MDQ-1/10 be used interchangeably with MDL-1/10-R?

A: Yes. MDQ-1/10 is a parametric equivalent with identical electrical and mechanical specifications. The series designation difference (MDQ versus MDL) does not affect functional compatibility. Both parts are suitable for the same applications and holder systems.