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

Part Overview

The BK/MDQ-10 is a 10 A, 32 V AC/DC slow blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 3AB and 3AG holders with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part is currently active in production with 624 pieces in stock. Equivalent substitute parts are necessary when the primary part is unavailable, when alternative compliance certifications are required, or when inventory from different manufacturers is needed to meet supply chain requirements.

Key Parameters

Parameter	Value
Current Rating	10 A
Voltage Rating (AC)	32 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	1 kA (Eaton); 300 A (Littelfuse)
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDQ-10 is determined by the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 10 A
Voltage Rating (AC): 32 V
Fuse Type: Cartridge, Glass
Response Time: Slow Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
Mounting Type: Requires Holder
Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)

All substitute parts listed meet these mandatory parameters. Variations in breaking capacity, DC cold resistance, melting I²t, approval agencies, and RoHS compliance status do not disqualify substitution but may influence selection based on application-specific requirements and regulatory compliance needs.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (AC)	Response Time	Package / Case	Size (Dia x L)	Breaking Capacity @ Rated Voltage	DC Cold Resistance (Ohms)	RoHS Status	Approval Agency	Inventory (Pcs)
BK/MDQ-10	Eaton - Electronics Division	10	32 V	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" x 1.250"	1 kA	0.0072	Non-compliant	CSA, UL	624
BK/MDL-10-R	Eaton - Electronics Division	10	32 V	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" x 1.250"	1 kA	0.01	ROHS3 Compliant	CE, CSA, UL	1273
0313010.HXIDP	Littelfuse Inc.	10	32 V	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" x 1.250"	300 A	0.0083	ROHS3 Compliant	UL	857
0313010.HXP	Littelfuse Inc.	10	32 V	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" x 1.250"	300 A	0.0083	ROHS3 Compliant	UL	767
0313010.MXP	Littelfuse Inc.	10	32 V	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" x 1.250"	300 A	0.0083	ROHS3 Compliant	UL	1692
0313010.VXP	Littelfuse Inc.	10	32 V	Slow Blow	3AB, 3AG, 1/4" x 1-1/4"	0.250" x 1.250"	300 A	0.0083	ROHS3 Compliant	CE, CSA, PSE, UL	890

Engineering Selection Recommendations

Eaton Substitutes: The BK/MDL-10-R is a direct Eaton equivalent with identical electrical and mechanical specifications to the BK/MDQ-10. The primary distinction is RoHS3 compliance status and expanded approval agency certifications (CE added). This part is suitable for applications requiring RoHS compliance and maintains the same manufacturer lineage.

Littelfuse Substitutes: The 0313010 series parts (HXIDP, HXP, MXP, VXP) are Littelfuse equivalents meeting all mandatory electrical and mechanical parameters. These parts are ROHS3 compliant and carry UL approval. The 0313010.VXP variant includes additional certifications (CE, CSA, PSE) beyond UL, making it suitable for applications with broader international regulatory requirements. All Littelfuse variants feature a 300 A breaking capacity compared to the 1 kA rating of Eaton parts.

Compliance Considerations:

For RoHS-compliant applications, select BK/MDL-10-R, 0313010.HXIDP, 0313010.HXP, 0313010.MXP, or 0313010.VXP
For applications requiring CE certification, select BK/MDL-10-R or 0313010.VXP
For applications requiring PSE certification, select 0313010.VXP only

Frequently Asked Questions (FAQ)

Q: Can I substitute BK/MDQ-10 with BK/MDL-10-R? A: Yes. Both parts share identical current rating (10 A), voltage rating (32 V AC), response time (slow blow), package type (3AB, 3AG), and physical dimensions (0.250" x 1.250"). The BK/MDL-10-R is RoHS3 compliant and includes CE certification.

Q: What is the difference between Eaton and Littelfuse substitutes? A: All parts meet the same electrical and mechanical specifications. The primary differences are breaking capacity (Eaton: 1 kA; Littelfuse: 300 A), DC cold resistance values, and approval agency certifications. Littelfuse parts are ROHS3 compliant; the original BK/MDQ-10 is not.

Q: Are all Littelfuse 0313010 variants interchangeable? A: Yes, for basic electrical function. The HXIDP, HXP, MXP, and VXP variants are electrically and mechanically identical. The VXP variant includes additional international certifications (CE, CSA, PSE) compared to HXIDP, HXP, and MXP which carry UL only.

Q: Which substitute has the highest inventory availability? A: The 0313010.MXP has the highest inventory with 1692 pieces in stock, followed by BK/MDL-10-R with 1273 pieces.

Q: Do these fuses require a specific holder type? A: Yes. All parts require a 3AB or 3AG holder. The fuse dimensions (0.250" Dia x 1.250" L) are standardized across all substitutes and are compatible with standard 3AB and 3AG holder designs.

Q: What is the operating temperature range for these fuses? A: The original BK/MDQ-10 does not specify an operating temperature range. Littelfuse substitutes (0313010 series) operate from -55°C to 125°C.

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