BK/MDQ-1/10 Equivalent & Substitute Parts

Part Overview

The BK/MDQ-1/10 is a 100 mA, 250 V AC/DC slow-blow glass cartridge fuse with 3AB/3AG form factor (0.250" Dia x 1.250" L). This component requires a compatible fuse holder for installation and is designed for circuit protection applications requiring slow-blow response characteristics.

The BK/MDQ-1/10 carries an obsolete product status. Equivalent substitute parts are available from both Eaton and Littelfuse manufacturers, all meeting the same electrical and mechanical specifications. Active-status alternatives provide continued availability for new designs and replacement applications.

Substiute Parts

BK/MDQ-1/10

Eaton - Electronics DivisionIn Stock: 757BK/MDQ-1/10 Datasheet

Current PartRFQ

BK/MDL-1/10-R

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

Parametric EquivalentRFQ

MDL-1/10-R

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

Parametric EquivalentRFQ

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 eligibility for the BK/MDQ-1/10 is determined by strict equivalence across the following parameters:

• Current Rating: 100 mA (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)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these criteria and are therefore direct functional equivalents. Variations in secondary parameters such as DC cold resistance, melting I²t, and RoHS compliance status do not affect substitutability for the primary circuit protection function.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are functionally equivalent to the BK/MDQ-1/10 and satisfy the core electrical and mechanical requirements for 100 mA, 250 V AC/DC slow-blow cartridge fuse applications with 3AB/3AG form factor.

Eaton MDL Series (BK/MDL-1/10-R, MDL-1/10-R): These parts are active-status alternatives from the original manufacturer. Both include CE certification in addition to CSA and UL approvals. The MDL-1/10-R variant is available in higher inventory quantity (941 units).

Eaton MDQ Series (MDQ-1/10): This active-status part maintains the same series designation as the obsolete BK/MDQ-1/10. It carries CSA and UL certifications and is available in substantial inventory (756 units).

Littelfuse 313 Series (0313.100HXP, 0313.100MXP, 0313.100VXP): These parts are active-status alternatives from an independent manufacturer. All three variants include CE certification in addition to CSA and UL approvals. The 0313.100MXP variant offers the highest inventory availability (2372 units).

Selection between Eaton and Littelfuse alternatives depends on supply chain requirements, existing vendor relationships, and inventory availability. All parts carry equivalent regulatory approvals (CSA, UL, and CE where applicable).

Frequently Asked Questions (FAQ)

Q: Can the BK/MDQ-1/10 be directly replaced with any of the listed substitute parts?

A: Yes. All substitute parts meet identical electrical specifications (100 mA, 250 V AC/DC, slow-blow response) and mechanical specifications (3AB/3AG form factor, 0.250" Dia x 1.250" L). Direct substitution is supported without circuit modification.

Q: What is the difference between the Eaton MDL and MDQ series alternatives?

A: Both series meet the same electrical and mechanical requirements. The MDL series (BK/MDL-1/10-R, MDL-1/10-R) includes CE certification. The MDQ series (MDQ-1/10) carries CSA and UL certifications. Selection depends on regulatory requirements for the target application.

Q: Are the Littelfuse 313 series parts (0313.100HXP, 0313.100MXP, 0313.100VXP) interchangeable with each other?

A: Yes. All three Littelfuse variants meet identical electrical and mechanical specifications and carry equivalent certifications (CE, CSA, UL). They are functionally interchangeable for circuit protection applications.

Q: Does the fuse holder compatibility change when substituting parts?

A: No. All substitute parts use the same 3AB/3AG form factor and 0.250" Dia x 1.250" L dimensions. Existing fuse holders designed for the BK/MDQ-1/10 accommodate all listed substitutes without modification.

Q: What is the significance of the "Requires Holder" mounting type?

A: This indicates that the fuse cartridge must be installed in a compatible fuse holder assembly. The holder provides electrical contact and mechanical retention. All substitute parts require the same holder type as the original BK/MDQ-1/10.

Q: Are there differences in DC cold resistance between the main part and substitutes?

A: Yes. The BK/MDQ-1/10 and MDQ-1/10 specify 35 Ohms DC cold resistance, while the MDL series specifies 15.68 Ohms and the Littelfuse 313 series specifies 43 Ohms. These variations do not affect substitutability for standard circuit protection applications.

Q: Which substitute part offers the best inventory availability?

A: The Littelfuse 0313.100MXP offers the highest inventory level at 2372 units. The MDL-1/10-R (941 units) and 0313.100HXP (962 units) also provide substantial availability.