Littelfuse 0326015.MXP Ceramic Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0326015.MXP is a 15 A, 250 V AC / 60 V DC ceramic fuse cartridge designed for use in 3AB, 3AG holder assemblies with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). This slow-blow fuse is classified as Active product status and is suitable for applications requiring reliable overcurrent protection in AC and DC circuits. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and approval certifications align with the original specification.

Key Parameters

Parameter	Value
Current Rating	15 A
Voltage Rating - AC	250 V
Voltage Rating - DC	60 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	400A AC, 500A DC
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Approval Agencies	CE, CSA, K-MARK, PSE, UL

Substitute Part Grouping Explanation

Substitute parts are classified based on strict alignment with the following critical parameters:

Primary Substitution Criteria:

Current Rating: 15 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Cartridge, Ceramic
Response Time: Slow Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" mechanical compatibility
Mounting Type: Requires Holder

Parametric Equivalent: 0326015.MXDP (Littelfuse Inc.) meets all primary criteria with identical electrical ratings and mechanical form factor. Differences in Melting I²t (760 vs. 245) and DC Cold Resistance (0.0083 vs. 0.005 Ohms) do not disqualify substitution within the same manufacturer series.

Direct Manufacturer Alternatives: 8020.0604 and 8020.0604.G (SCHURTER Inc.) and BK/MDA-15-R and MDA-15-R (Eaton - Electronics Division) provide equivalent 15 A, 250 V AC ratings with identical mechanical packaging. These alternatives maintain ceramic cartridge construction and slow-blow response characteristics.

Non-Equivalent Part: 0001.2538 (SCHURTER Inc.) is listed in the substitute field but does not qualify as a direct substitute due to different current rating (25 A) and voltage ratings (150 V AC / 63 V DC), which exceed the original specification parameters.

Parameter Comparison

Parameter	0326015.MXP (Littelfuse)	0326015.MXDP (Littelfuse)	8020.0604 (SCHURTER)	8020.0604.G (SCHURTER)	BK/MDA-15-R (Eaton)	MDA-15-R (Eaton)
Current Rating (Amps)	15 A	15 A	15 A	15 A	15 A	15 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Voltage Rating - DC	60 V	60 V	Not Specified	Not Specified	Not Specified	Not Specified
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Slow Blow	Slow Blow	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"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"
Breaking Capacity @ Rated Voltage	400A AC, 500A DC	400A AC, 500A DC	500A	500A	750A	750A
Melting I²t	245	760	152	152	336.82	336.82
DC Cold Resistance (Ohms)	0.005	0.0083	0.0047	0.0047	0.00553	0.00553
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	Not Specified	Not Specified
Approval Agencies	CE, CSA, K-MARK, PSE, UL	CE, CSA, UL	cURus	cURus	CE, CSA, UL	CE, CSA, UL
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection - Littelfuse 0326015.MXDP: This parametric equivalent maintains identical electrical specifications (15 A, 250 V AC, 60 V DC) and mechanical form factor as the original 0326015.MXP. Both parts carry Active product status and share overlapping approval certifications (CE, CSA, UL). Selection of this substitute preserves full compatibility with existing holder assemblies and circuit protection requirements.

Alternative Selection - SCHURTER 8020.0604 or 8020.0604.G: These parts provide equivalent 15 A, 250 V AC ratings with identical mechanical packaging. The 8020.0604.G variant includes a base product designation. Both maintain ceramic cartridge construction and slow-blow response. Operating temperature range (-40°C ~ 85°C) is narrower than the original specification. Approval certification is cURus (combined UL and CSA recognition). These alternatives are suitable for applications within the specified temperature range.

Alternative Selection - Eaton BK/MDA-15-R or MDA-15-R: These parts deliver equivalent 15 A, 250 V AC ratings with identical mechanical packaging and ceramic cartridge construction. The BK/MDA-15-R variant includes a black color designation. Both carry CE, CSA, and UL approvals. Breaking capacity (750A) exceeds the original specification. These alternatives are suitable for applications requiring higher fault current handling capability.

Non-Equivalent Part - SCHURTER 0001.2538: This part does not qualify as a substitute due to different electrical ratings (25 A current, 150 V AC / 63 V DC voltage). Use only when circuit protection requirements specifically call for 25 A operation.

Frequently Asked Questions (FAQ)

Q: Can I use 0326015.MXDP as a direct replacement for 0326015.MXP?

A: Yes. Both parts are Littelfuse ceramic fuse cartridges with identical current (15 A), AC voltage (250 V), and DC voltage (60 V) ratings. Mechanical compatibility with 3AB, 3AG holders is confirmed. Differences in Melting I²t and DC Cold Resistance do not affect substitution eligibility within the same manufacturer series.

Q: Are SCHURTER and Eaton fuses compatible with Littelfuse holders?

A: Yes. All substitute parts share identical mechanical packaging (3AB, 3AG, 1/4" x 1-1/4"). Physical form factor compatibility with standard holder assemblies is confirmed. Electrical ratings (15 A, 250 V AC) align with the original specification.

Q: What is the difference between 8020.0604 and 8020.0604.G?

A: Both parts are SCHURTER ceramic fuse cartridges with identical electrical and mechanical specifications. The 8020.0604.G variant includes a base product designation (8020.0604). Functional performance and substitution eligibility are equivalent.

Q: Why is 0001.2538 listed but not recommended as a substitute?

A: The 0001.2538 has different electrical ratings (25 A current, 150 V AC / 63 V DC voltage) compared to the original 0326015.MXP (15 A, 250 V AC / 60 V DC). It does not meet the primary substitution criteria and should only be used when circuit protection requirements specifically require 25 A operation.

Q: What approval certifications should I verify for my application?

A: The original 0326015.MXP carries CE, CSA, K-MARK, PSE, and UL approvals. Substitute parts carry varying certification sets: 0326015.MXDP (CE, CSA, UL), SCHURTER parts (cURus), and Eaton parts (CE, CSA, UL). Verify that the selected substitute meets the regulatory requirements for your specific application and region.

Q: Are there temperature range differences between substitutes?

A: Yes. The original 0326015.MXP and 0326015.MXDP operate across -55°C ~ 125°C. SCHURTER alternatives (8020.0604, 8020.0604.G) operate across -40°C ~ 85°C. Eaton alternatives do not specify an operating temperature range. Confirm that the selected substitute's temperature range accommodates your application environment.

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