Littelfuse 0325012.MXDP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0325012.MXDP is a 12 A, 250 V AC / 60 V DC ceramic cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in 3AB/3AG package format (1/4" x 1-1/4" axial). This component is classified as Active product status with full regulatory compliance (CE, CSA, UL). Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	12 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" (Axial)
Mounting Type	Through Hole
Operating Temperature Range	-55°C ~ 125°C
Breaking Capacity @ Rated Voltage	400A AC, 500A DC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following parameters:

Current Rating: 12 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Mounting Type: Through Hole (exact match required)
Response Time: Slow Blow (exact match required)

Two substitute parts meet these criteria:

Littelfuse 0325012.HXP - Parametric equivalent with identical electrical and mechanical specifications
SCHURTER 8020.0603.PT - Manufacturer-recommended equivalent with compatible ratings and package format

Parameter Comparison

Parameter	0325012.MXDP (Main)	0325012.HXP (Littelfuse)	8020.0603.PT (SCHURTER)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	SCHURTER Inc.
Current Rating (Amps)	12 A	12 A	12 A
Voltage Rating - AC	250 V	250 V	250 V
Voltage Rating - DC	60 V	60 V	Not specified
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	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"
Mounting Type	Through Hole	Through Hole	Through Hole
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.270" Dia x 1.291" L (6.85mm x 32.80mm)
Breaking Capacity @ Rated Voltage	400A AC, 500A DC	400A AC, 500A DC	500A
Melting I²t	445	129	72
DC Cold Resistance	0.0011 Ohms	0.0067 Ohms	0.0056 Ohms
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Approval Agency	CE, CSA, UL	CE, CSA, K-MARK, PSE, UL	cURus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

Littelfuse 0325012.HXP is a direct parametric equivalent within the same manufacturer series (325). Both parts share identical current, voltage, and package specifications with full regulatory alignment (CE, CSA, UL). Selection of this substitute is appropriate for applications requiring exact electrical and thermal characteristics.

SCHURTER 8020.0603.PT is a manufacturer-recommended cross-reference with compatible electrical ratings and package format. This part carries cURus certification and meets ROHS3 compliance. The operating temperature range (-40°C ~ 85°C) is narrower than the main part, and melting I²t characteristics differ; these factors must be evaluated against specific application requirements. Dimensional tolerances (0.270" Dia vs. 0.275" Dia) remain within standard cartridge fuse specifications for 3AB/3AG packages.

All three parts maintain Active product status and ROHS3 compliance, supporting long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can 0325012.HXP be used as a direct replacement for 0325012.MXDP?

A: Yes. Both parts are Littelfuse Series 325 ceramic cartridge fuses with identical 12 A / 250 V AC / 60 V DC ratings, slow-blow response, 3AB/3AG package format, and -55°C ~ 125°C operating temperature range. Electrical and mechanical compatibility is confirmed.

Q: What are the key differences between the Littelfuse and SCHURTER substitutes?

A: The SCHURTER 8020.0603.PT differs in three areas: (1) Operating temperature range is -40°C ~ 85°C versus -55°C ~ 125°C for Littelfuse parts; (2) Melting I²t is 72 versus 445 (0325012.MXDP) or 129 (0325012.HXP), indicating faster thermal response; (3) Regulatory certifications are cURus versus CE/CSA/UL. Physical dimensions are within standard tolerance for 3AB/3AG cartridge fuses.

Q: Are dimensional variations between parts significant?

A: Dimensional differences (0.275" Dia x 1.288" L for Littelfuse versus 0.270" Dia x 1.291" L for SCHURTER) fall within standard manufacturing tolerances for 3AB/3AG cartridge fuse packages. Both parts are mechanically compatible with standard fuse holders designed for this package format.

Q: Which substitute should be selected for high-temperature applications?

A: The Littelfuse parts (0325012.MXDP and 0325012.HXP) support -55°C ~ 125°C operation. The SCHURTER 8020.0603.PT is rated to 85°C maximum and is not suitable for applications exceeding this temperature.

Q: Do all parts meet RoHS compliance?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic component manufacturing.

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