MDQ-1-2/10 Equivalent & Substitute Parts

Part Overview

The MDQ-1-2/10 is a 1.2 A, 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 dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part maintains Active product status with 1068 pieces currently in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, ensuring direct interchangeability in holder-based fuse applications.

Substiute Parts

MDQ-1-2/10

Eaton - Electronics DivisionIn Stock: 1108MDQ-1-2/10 Datasheet

Current PartRFQ

BK/MDL-1-2/10-R

Eaton - Electronics DivisionIn Stock: 1301BK/MDL-1-2/10-R Datasheet

Parametric EquivalentRFQ

031301.2MXP

Littelfuse Inc.In Stock: 1009031301.2MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDQ-1-2/10 are classified as parametric equivalents based on the following critical parameters:

Electrical Parameters:

• Current Rating: 1.2 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Glass (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 meet these criteria and are therefore suitable for direct replacement in applications originally specified for the MDQ-1-2/10.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed—MDQ-1-2/10, BK/MDL-1-2/10-R, and 031301.2MXP—are Active status products with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

Compliance and Certification: The 031301.2MXP (Littelfuse) carries the broadest approval agency coverage (CE, CSA, PSE, UL) compared to the MDQ-1-2/10 (CSA, UL). The BK/MDL-1-2/10-R does not specify approval agencies in the provided data.

Environmental and Regulatory Compliance: Both BK/MDL-1-2/10-R and 031301.2MXP are ROHS3 Compliant and REACH Unaffected. Compliance status for the MDQ-1-2/10 is not specified in the provided data.

Availability: BK/MDL-1-2/10-R has the highest inventory (1248 pieces), followed by MDQ-1-2/10 (1068 pieces) and 031301.2MXP (976 pieces).

Manufacturer Continuity: Both Eaton parts (MDQ-1-2/10 and BK/MDL-1-2/10-R) maintain manufacturer continuity if supply chain preference exists for a single supplier.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-1-2/10-R be used as a direct replacement for MDQ-1-2/10?

A: Yes. Both parts share identical electrical ratings (1.2 A, 250 V AC), response time (Slow Blow), fuse type (Cartridge, Glass), and mechanical dimensions (0.250" Dia x 1.250" L). Both are manufactured by Eaton and fit 3AB and 3AG holders without modification.

Q: Is the Littelfuse 031301.2MXP compatible with the same holder as the Eaton MDQ-1-2/10?

A: Yes. The 031301.2MXP has identical package specifications (3AB, 3AG, 1/4" x 1-1/4") and physical dimensions (0.250" Dia x 1.250" L), ensuring compatibility with the same holder configurations.

Q: What are the key parameters that determine substitutability for this fuse?

A: Current rating (1.2 A), voltage rating (250 V AC), response time (Slow Blow), fuse type (Cartridge, Glass), package designation (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L) must all match exactly for direct substitution.

Q: Does the MDQ-1-2/10 require a specific holder type?

A: Yes. The MDQ-1-2/10 requires a holder compatible with 3AB or 3AG fuse cartridges. The fuse cannot be used without an appropriate holder.

Q: Are there differences in breaking capacity between these substitute parts?

A: The MDQ-1-2/10 specifies 35 A breaking capacity at rated voltage. The BK/MDL-1-2/10-R does not specify breaking capacity in the provided data. The 031301.2MXP specifies 100 A breaking capacity at rated voltage. Breaking capacity differences do not affect substitutability for standard overcurrent protection applications.

Q: Which substitute part has the best regulatory compliance coverage?

A: The 031301.2MXP (Littelfuse) carries certifications from CE, CSA, PSE, and UL. The MDQ-1-2/10 carries CSA and UL certifications. The BK/MDL-1-2/10-R does not specify approval agencies in the provided data.