Littelfuse 0313015.MXP Glass Cartridge Fuse 15A 32VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0313015.MXP is a 15A 32VAC glass cartridge fuse with slow-blow response characteristics, designed for use in 3AB and 3AG fuse holders. This component is classified as Active product status and is manufactured to UL approval standards. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and performance characteristics that ensure functional interchangeability within the specified application parameters.

Key Parameters

Parameter	Value
Current Rating	15 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)
Breaking Capacity @ Rated Voltage	300A
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0313015.MXP is determined by the following critical parameters:

Electrical Parameters: Current rating (15 A), voltage rating (32 V AC), and response time (slow blow) must match exactly. These parameters define the protective function and circuit compatibility.

Mechanical Parameters: Package designation (3AB, 3AG) and physical dimensions (0.250" Dia x 1.250" L) must be identical to ensure mechanical fit within existing fuse holders.

Performance Parameters: Breaking capacity and melting I²t characteristics must be equivalent to maintain circuit protection integrity.

Compliance Parameters: Approval agencies (UL, CSA) and RoHS status must be maintained for regulatory compliance.

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Littelfuse): Parts 0313015.HXP and 0313015.VXP are manufactured by Littelfuse Inc. and share identical electrical, mechanical, and performance specifications with the main part number.

Cross-Manufacturer Equivalent (Eaton): Part MDQ-15 manufactured by Eaton - Electronics Division meets all critical electrical and mechanical parameters with equivalent performance characteristics.

Parameter Comparison

Parameter	0313015.MXP	0313015.HXP	0313015.VXP	MDQ-15
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Eaton - Electronics Division
Current Rating (Amps)	15 A	15 A	15 A	15 A
Voltage Rating - AC	32 V	32 V	32 V	32 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
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"
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)
Breaking Capacity @ Rated Voltage	300A	300A	300A	1kA
DC Cold Resistance	0.005 Ohms	0.005 Ohms	0.005 Ohms	0.0041 Ohms
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	Not Specified
Approval Agency	UL	UL	UL	CSA, UL
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and are approved by recognized certification bodies (UL and/or CSA). Selection between the main part and substitutes is based on availability and supply chain requirements, as all parts meet identical functional and mechanical specifications.

Littelfuse 0313015.HXP and 0313015.VXP are direct equivalents manufactured by the original equipment manufacturer and provide identical performance characteristics with full compliance to RoHS3 standards.

Eaton MDQ-15 is a cross-manufacturer equivalent that meets all critical electrical and mechanical parameters. This part features a higher breaking capacity (1kA versus 300A) and lower DC cold resistance (0.0041 Ohms versus 0.005 Ohms), which represent enhanced performance characteristics. CSA and UL approvals confirm regulatory compliance for applications requiring dual certification.

Frequently Asked Questions (FAQ)

Q: Can 0313015.HXP and 0313015.VXP be used interchangeably with 0313015.MXP?

A: Yes. All three parts are manufactured by Littelfuse Inc. and share identical electrical ratings (15A, 32VAC), response time (slow blow), mechanical dimensions (0.250" Dia x 1.250" L), and package designation (3AB, 3AG). They are functionally equivalent for all applications.

Q: Is the Eaton MDQ-15 a suitable replacement for the Littelfuse 0313015.MXP?

A: Yes. The MDQ-15 meets all critical substitution parameters: 15A current rating, 32V AC voltage rating, slow-blow response, identical mechanical dimensions, and 3AB/3AG package compatibility. Both parts are UL approved. The MDQ-15 provides enhanced breaking capacity (1kA) and lower resistance characteristics.

Q: What are the key parameters that determine if a fuse can substitute for the 0313015.MXP?

A: The critical parameters are current rating (15A), voltage rating (32VAC), response time (slow blow), physical dimensions (0.250" Dia x 1.250" L), and package designation (3AB, 3AG). Any deviation in these parameters disqualifies a part as a substitute.

Q: Are all substitute parts RoHS3 compliant?

A: The Littelfuse parts (0313015.HXP and 0313015.VXP) are explicitly RoHS3 compliant. The Eaton MDQ-15 RoHS status is not specified in the provided data.

Q: What is the difference between the 0313015.MXP and 0313015.HXP?

A: Both parts are identical in all specified electrical, mechanical, and performance parameters. The difference is in the part number designation and manufacturing batch/packaging variant.

Q: Can I use MDQ-15 in applications where 0313015.MXP is specified?

A: Yes, provided the application does not have specific manufacturer requirements. The MDQ-15 meets all functional and mechanical specifications. The higher breaking capacity (1kA) and lower resistance of the MDQ-15 represent equivalent or superior performance for the specified 15A, 32VAC circuit protection function.

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