Littelfuse 0325010.MX52LP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0325010.MX52LP is a 10 A, 250 V AC/DC ceramic cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in 3AB and 3AG package formats. This component is classified as Active product status and maintains full compliance with international safety standards including CE, CSA, KC, PSE, and UL certifications. Substitute parts are identified when identical electrical specifications, mechanical dimensions, and approval certifications align with the original component requirements.

Key Parameters

Parameter	Value
Current Rating	10 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	400 A
Melting I²t	137
Operating Temperature Range	-55°C ~ 125°C
DC Cold Resistance	0.0132 Ohms
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
RoHS Status	ROHS3 Compliant
Approval Agencies	CE, CSA, KC, PSE, UL

Substitute Part Grouping Explanation

Substitute parts for the 0325010.MX52LP are qualified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic requires exact matching of:

Current Rating: 10 A
Voltage Rating (AC): 250 V
Fuse Type: Cartridge, Ceramic
Response Time: Slow Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial)
Breaking Capacity @ Rated Voltage: 400 A
Melting I²t: 137
Operating Temperature Range: -55°C ~ 125°C
DC Cold Resistance: 0.0132 Ohms
Size / Dimension: 0.275" Dia x 1.288" L (6.99mm x 32.72mm)
RoHS Status: ROHS3 Compliant

All identified substitute parts maintain these parameters without deviation. Approval agency certifications must include CE, CSA, PSE, and UL as minimum requirements for direct substitution.

Parameter Comparison

Parameter	0325010.MX52LP	0325010.HXP	0325010.MXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	10 A	10 A	10 A
Voltage Rating - AC	250 V	250 V	250 V
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" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole	Through Hole	Through Hole
Breaking Capacity @ Rated Voltage	400 A	400 A	400 A
Melting I²t	137	137	137
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.0132 Ohms	0.0132 Ohms	0.0132 Ohms
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)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active
Approval Agencies	CE, CSA, KC, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL

Engineering Selection Recommendations

All three parts—0325010.MX52LP, 0325010.HXP, and 0325010.MXP—are manufactured by Littelfuse Inc. and maintain Active product status. Each part carries full compliance with CE, CSA, PSE, and UL certifications, meeting international safety and performance standards. The parts are electrically and mechanically identical across all specified parameters, including current rating, voltage rating, response time, breaking capacity, and thermal characteristics.

Selection between these parts may be based on inventory availability and lead time considerations, as all three are direct parametric equivalents suitable for identical circuit applications.

Frequently Asked Questions (FAQ)

Q: Can 0325010.HXP or 0325010.MXP be used as direct replacements for 0325010.MX52LP?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (10 A, 250 V AC/DC), ceramic cartridge construction, slow-blow response, 400 A breaking capacity, and 3AB/3AG package dimensions. All three parts maintain ROHS3 compliance and carry CE, CSA, PSE, and UL certifications.

Q: Are there differences in approval certifications between these parts?

A: The 0325010.MX52LP includes KC certification in addition to CE, CSA, PSE, and UL. The 0325010.HXP and 0325010.MXP include K-MARK certification instead of KC. All three parts meet the core international safety standards required for general industrial applications.

Q: What determines substitution eligibility for this fuse category?

A: Substitution is determined by exact matching of current rating, voltage rating, fuse type, response time, package format, breaking capacity, melting I²t value, operating temperature range, and physical dimensions. All three parts meet these criteria without exception.

Q: Can these parts be used in both AC and DC circuits?

A: Yes. All three parts are rated for 250 V AC/DC operation with identical DC cold resistance of 0.0132 Ohms, confirming suitability for both AC and DC applications within the specified voltage range.

Q: What is the significance of the 3AB and 3AG package designation?

A: The 3AB and 3AG designations refer to standardized ceramic cartridge fuse formats with 1/4" diameter and 1-1/4" length. This package format ensures mechanical compatibility with standard fuse holders and through-hole PCB mounting applications.

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