MDL-10-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The MDL-10-R is a 10 A, 32 V AC/DC slow blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in 3AB and 3AG fuse holders with 1/4" x 1-1/4" dimensions. The part maintains Active product status and is RoHS Compliant. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and holder compatibility to ensure direct functional replacement in circuit protection applications.

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"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	1kA (MDL series) / 300A (313 series)
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the MDL-10-R are classified based on strict parameter alignment:

Direct Manufacturer Equivalent: BK/MDL-10-R is an Eaton - Electronics Division variant with identical electrical specifications (10 A, 32 V AC, slow blow response), mechanical dimensions (0.250" Dia x 1.250" L), holder compatibility (3AB, 3AG), and breaking capacity (1kA). This part differs only in RoHS status designation (ROHS3 Compliant vs. RoHS Compliant) and MSL rating (1 Unlimited vs. Not Applicable).

Parametric Equivalents: Parts 0313010.HXIDP, 0313010.HXP, 0313010.VXP, and 0313010.MXP are manufactured by Littelfuse Inc. (Series 313). These parts match the MDL-10-R in all critical electrical parameters (10 A current rating, 32 V AC voltage rating, slow blow response) and mechanical specifications (0.250" Dia x 1.250" L, 3AB/3AG holder compatibility). Differences exist in breaking capacity (300A vs. 1kA), melting I²t (760 vs. 64.4), DC cold resistance (0.0083 Ohms vs. 0.01 Ohms), and approval agency certifications.

Key Parameters Determining Substitution:

Current Rating: 10 A (all parts)
Voltage Rating: 32 V AC (all parts)
Response Time: Slow Blow (all parts)
Mechanical Fit: 0.250" Dia x 1.250" L (all parts)
Holder Compatibility: 3AB, 3AG (all parts)

Parameter Comparison

Parameter	MDL-10-R (Eaton)	BK/MDL-10-R (Eaton)	0313010.MXP (Littelfuse)	0313010.HXIDP (Littelfuse)	0313010.HXP (Littelfuse)	0313010.VXP (Littelfuse)
Manufacturer	Eaton - Electronics Division	Eaton - Electronics Division	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	10 A	10 A	10 A	10 A	10 A	10 A
Voltage Rating - AC	32 V	32 V	32 V	32 V	32 V	32 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Breaking Capacity @ Rated Voltage	1kA	1kA	300A	300A	300A	300A
Melting I²t	64.4	64.4	760	760	760	760
DC Cold Resistance	0.01 Ohms	0.01 Ohms	0.0083 Ohms	0.0083 Ohms	0.0083 Ohms	0.0083 Ohms
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CE, CSA, UL	CE, CSA, UL	UL	UL	UL	CE, CSA, PSE, UL
Operating Temperature	Not specified	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Selection - BK/MDL-10-R: This Eaton variant is the direct equivalent to MDL-10-R. Both parts share identical electrical specifications, mechanical dimensions, and breaking capacity (1kA). Selection of BK/MDL-10-R is appropriate when maintaining consistency with the original Eaton - Electronics Division product line and when the 1kA breaking capacity is a circuit design requirement. Both parts carry CE, CSA, and UL certifications.

Secondary Selection - Littelfuse 313 Series (0313010.MXP, 0313010.HXIDP, 0313010.HXP, 0313010.VXP): These parts provide parametric equivalence in current rating (10 A), voltage rating (32 V AC), response time (slow blow), and mechanical fit (0.250" Dia x 1.250" L, 3AB/3AG compatibility). The Littelfuse parts differ in breaking capacity (300A vs. 1kA) and melting I²t characteristics (760 vs. 64.4). Selection from this group is appropriate when circuit protection requirements align with 300A breaking capacity specifications. Part 0313010.VXP carries the broadest certification scope (CE, CSA, PSE, UL) among Littelfuse options.

Certification Considerations: MDL-10-R and BK/MDL-10-R both hold CE, CSA, and UL approvals. Littelfuse parts 0313010.HXIDP, 0313010.HXP, and 0313010.MXP hold UL certification only. Part 0313010.VXP holds CE, CSA, PSE, and UL certifications, providing broader regulatory coverage equivalent to the Eaton products.

Frequently Asked Questions (FAQ)

Q: Can Littelfuse 313 series parts directly replace MDL-10-R in all applications?

A: Littelfuse 313 series parts (0313010.MXP, 0313010.HXIDP, 0313010.HXP, 0313010.VXP) match the MDL-10-R in current rating (10 A), voltage rating (32 V AC), response time (slow blow), and mechanical dimensions (0.250" Dia x 1.250" L). However, they differ in breaking capacity (300A vs. 1kA) and melting I²t (760 vs. 64.4). Substitution is appropriate only when the circuit design accommodates the 300A breaking capacity specification.

Q: What is the difference between MDL-10-R and BK/MDL-10-R?

A: Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (10 A, 32 V AC), response characteristics (slow blow), mechanical dimensions (0.250" Dia x 1.250" L), and breaking capacity (1kA). The primary differences are RoHS status designation (RoHS Compliant vs. ROHS3 Compliant) and MSL rating (Not Applicable vs. 1 Unlimited). Both parts are Active status products with CE, CSA, and UL certifications.

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

A: Yes. All listed substitute parts (BK/MDL-10-R, 0313010.MXP, 0313010.HXIDP, 0313010.HXP, 0313010.VXP) are specified for 3AB and 3AG holder compatibility with identical mechanical dimensions (0.250" Dia x 1.250" L). Mechanical fit is guaranteed across all parts.

Q: Which Littelfuse part has the broadest regulatory certification?

A: Part 0313010.VXP carries CE, CSA, PSE, and UL certifications, providing the broadest regulatory coverage among the Littelfuse 313 series options. This part matches the certification scope of the Eaton products (which carry CE, CSA, and UL) with the addition of PSE approval.

Q: What is the significance of the different melting I²t values?

A: Melting I²t is a thermal characteristic that defines the fuse's response to overcurrent conditions. MDL-10-R and BK/MDL-10-R have a melting I²t of 64.4, while Littelfuse 313 series parts have a melting I²t of 760. This difference reflects different thermal response profiles and is relevant to circuit protection coordination. Selection must align with the specific circuit protection requirements.

Q: Can I use 0313010.VXP as a direct replacement for MDL-10-R?

A: Part 0313010.VXP provides parametric equivalence in current rating (10 A), voltage rating (32 V AC), response time (slow blow), and mechanical fit (0.250" Dia x 1.250" L, 3AB/3AG compatibility). It carries CE, CSA, PSE, and UL certifications. Substitution is appropriate when the circuit design accommodates the 300A breaking capacity and 760 melting I²t specifications of the Littelfuse part.

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