Equivalent & Substitute Parts for MDQ-8/10 Glass Cartridge Fuse

Part Overview

The MDQ-8/10 is an 800 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring overcurrent protection in 3AB and 3AG holder configurations with a 1/4" x 1-1/4" form factor. The part is currently active in production with 714 units in stock. Substitute parts are necessary to address supply chain continuity, alternative sourcing options, and specific compliance or performance requirements in different operational environments.

Substiute Parts

MDQ-8/10

Eaton - Electronics DivisionIn Stock: 727MDQ-8/10 Datasheet

Current PartRFQ

BK/MDL-8/10-R

Eaton - Electronics DivisionIn Stock: 1477BK/MDL-8/10-R Datasheet

Parametric EquivalentRFQ

0034.5224

SCHURTER Inc.In Stock: 8660034.5224 Datasheet

Parametric EquivalentRFQ

0313.800MXP

Littelfuse Inc.In Stock: 20030313.800MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDQ-8/10 is determined by strict equivalence across the following parameters:

• Current Rating: 800 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 / 6.35mm x 31.75mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these criteria and are therefore direct parametric equivalents suitable for replacement in applications originally specified for the MDQ-8/10.

Parameter Comparison

Engineering Selection Recommendations

BK/MDL-8/10-R (Eaton - Electronics Division): This substitute maintains active product status and is manufactured by the same supplier as the MDQ-8/10. It offers the highest inventory availability at 1372 units. RoHS3 compliance is confirmed. This option is suitable for applications where supply continuity from a single manufacturer is preferred.

0034.5224 (SCHURTER Inc.): This part carries obsolete product status and should be selected only when existing inventory must be maintained or when legacy system compatibility is required. It meets CSA and UL approval requirements and is RoHS3 compliant. Operating temperature range is specified as -55°C to 125°C.

0313.800MXP (Littelfuse Inc.): This substitute is the only option with CE certification in addition to CSA and UL approvals, making it suitable for applications requiring European compliance. It maintains active product status with the highest inventory level at 1916 units. RoHS3 compliance and operating temperature range of -55°C to 125°C are confirmed. DC cold resistance is specified at 0.554 Ohms.

Selection should be based on supply chain requirements, geographic compliance mandates, and inventory availability rather than technical performance, as all options are parametric equivalents.

Frequently Asked Questions (FAQ)

Q: Can the BK/MDL-8/10-R be used as a direct replacement for the MDQ-8/10?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical and mechanical specifications: 800 mA current rating, 250 V AC voltage rating, slow-blow response, and 3AB/3AG package configuration. Physical dimensions and holder requirements are identical.

Q: Why is the 0034.5224 listed as obsolete?

A: The 0034.5224 is marked as obsolete by SCHURTER Inc., indicating it is no longer in active production. However, it remains a parametric equivalent and can be used as a substitute if existing inventory is available or if legacy system requirements mandate its use.

Q: What is the difference between the MDQ-8/10 and 0313.800MXP in terms of certifications?

A: The MDQ-8/10 carries CSA and UL approvals. The 0313.800MXP carries CE, CSA, and UL approvals. The additional CE certification makes the Littelfuse part suitable for applications requiring European Union compliance.

Q: Are all substitute parts compatible with existing 3AB and 3AG holders?

A: Yes. All substitute parts share the identical package designation (3AB, 3AG) and physical dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm), ensuring mechanical compatibility with existing holder configurations.

Q: What is the significance of the breaking capacity specification?

A: Breaking capacity indicates the maximum current the fuse can safely interrupt at rated voltage. The MDQ-8/10, 0034.5224, and 0313.800MXP all specify 35A breaking capacity. The BK/MDL-8/10-R does not provide this specification in available documentation.

Q: Which substitute offers the best availability?

A: The 0313.800MXP from Littelfuse Inc. offers the highest inventory level at 1916 units in stock, followed by the BK/MDL-8/10-R at 1372 units.

Q: Can these fuses be used in DC applications?

A: The specifications indicate these are 250 V AC/DC fuses, confirming suitability for both AC and DC applications at the rated voltage.