BK/MDQ-2-8/10 Equivalent & Substitute Parts

Part Overview

The BK/MDQ-2-8/10 is a 2.8 A, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent and substitute parts for ongoing system maintenance and new designs. The MDQ series has been superseded by the MDL series within Eaton's product line, while cross-manufacturer alternatives from Littelfuse Inc. provide additional sourcing options. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct replacement without circuit modification.

Substiute Parts

BK/MDQ-2-8/10

Eaton - Electronics DivisionIn Stock: 1007BK/MDQ-2-8/10 Datasheet

Current PartRFQ

BK/MDL-2-8/10-R

Eaton - Electronics DivisionIn Stock: 988BK/MDL-2-8/10-R Datasheet

Parametric EquivalentRFQ

MDL-2-8/10-R

Eaton - Electronics DivisionIn Stock: 998MDL-2-8/10-R Datasheet

Parametric EquivalentRFQ

MDQ-2-8/10

Eaton - Electronics DivisionIn Stock: 1097MDQ-2-8/10 Datasheet

Parametric EquivalentRFQ

031302.8HXP

Littelfuse Inc.In Stock: 1021031302.8HXP Datasheet

DirectRFQ

031302.8MXP

Littelfuse Inc.In Stock: 836031302.8MXP Datasheet

Parametric EquivalentRFQ

031302.8VXP

Littelfuse Inc.In Stock: 1131031302.8VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Primary Equivalence Criteria:

• Current Rating: 2.8 A (exact match required)
• Voltage Rating: 250 V AC (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)
• Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Considerations:

• Breaking Capacity: 100A (available on active MDQ and Littelfuse alternatives)
• Approval Agencies: CSA, UL, CE certifications (available on active alternatives)
• RoHS Compliance: ROHS3 Compliant (available on Littelfuse alternatives)

All substitute parts listed below satisfy primary equivalence criteria. The obsolete BK/MDQ-2-8/10 may be replaced with any listed substitute without electrical or mechanical modification to the circuit or holder assembly.

Parameter Comparison

Engineering Selection Recommendations

Eaton MDL Series (Recommended for Eaton-based systems): BK/MDL-2-8/10-R and MDL-2-8/10-R are active Eaton products that directly replace the obsolete BK/MDQ-2-8/10. Both MDL variants maintain full electrical and mechanical compatibility while offering RoHS Compliance. Selection between BK/MDL-2-8/10-R (bulk packaging) and MDL-2-8/10-R (bulk packaging) depends on internal Eaton part numbering conventions and procurement requirements.

Eaton MDQ Series (Active Alternative): MDQ-2-8/10 is an active Eaton product with identical electrical specifications. This part provides 100A breaking capacity and CSA/UL approval certifications, offering enhanced performance documentation compared to the obsolete BK/MDQ-2-8/10.

Littelfuse 313 Series (Cross-Manufacturer Alternative): 031302.8HXP, 031302.8MXP, and 031302.8VXP are active Littelfuse products that satisfy all primary equivalence criteria. All three variants provide 100A breaking capacity, ROHS3 Compliance, and comprehensive approval certifications (CE, CSA, K-MARK, PSE, UL). Operating temperature range is -55°C to 125°C with DC cold resistance of 0.0675 Ohms. Selection among these three Littelfuse variants depends on specific approval agency requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can BK/MDQ-2-8/10 be directly replaced with any listed substitute?

A: Yes. All substitute parts listed maintain identical current rating (2.8 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), package designation (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). Direct replacement in existing 3AB/3AG holders requires no circuit or mechanical modification.

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

A: MDL is the active successor series to the obsolete MDQ. Both maintain identical electrical and mechanical specifications for the 2.8 A, 250 V rating. MDL variants offer RoHS Compliance. The active MDQ-2-8/10 provides documented 100A breaking capacity and CSA/UL certifications.

Q: Are Littelfuse 313 series fuses compatible with Eaton 3AB/3AG holders?

A: Yes. Littelfuse 031302.8HXP, 031302.8MXP, and 031302.8VXP maintain the identical 3AB/3AG package designation and 0.250" Dia x 1.250" L physical dimensions required for Eaton holder compatibility.

Q: What certifications are available on substitute parts?

A: Eaton MDL series carries no specified approval agencies. Eaton MDQ-2-8/10 carries CSA and UL certifications. Littelfuse 313 series variants carry CE, CSA, K-MARK, PSE, and UL certifications.

Q: Is RoHS Compliance required for substitution?

A: RoHS Compliance is not a substitution requirement. The obsolete BK/MDQ-2-8/10 is RoHS non-compliant. Active Eaton MDL variants are RoHS Compliant. Littelfuse 313 variants are ROHS3 Compliant. Selection depends on end-application regulatory requirements.

Q: What is the melting I²t value for substitute parts?

A: Littelfuse 313 series variants (031302.8HXP, 031302.8MXP, 031302.8VXP) specify melting I²t of 170. Eaton MDL and MDQ series do not provide this parameter in available documentation.

Q: Can these fuses be used in AC and DC circuits?

A: All parts are rated for 250 V AC/DC operation. Littelfuse variants specify DC cold resistance of 0.0675 Ohms and operating temperature range of -55°C to 125°C.