Littelfuse 0332003.MXP Ceramic Fuse Cartridge – Equivalent & Substitute Parts

Part Overview

The Littelfuse 0332003.MXP is a 3 A, 250 V AC / 125 V DC ceramic fuse cartridge designed for fast-blow response applications. This component requires a compatible holder (3AB, 3AG format) and operates across a temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of active equivalent alternatives necessary for ongoing procurement and system maintenance.

Key Parameters

Parameter	Value
Current Rating	3 A
Voltage Rating (AC)	250 V
Voltage Rating (DC)	125 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (6.35mm x 31.75mm)
Mounting Type	Requires Holder
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0332003.MXP is determined by the following mandatory parameters:

Current Rating: 3 A (exact match required)
Voltage Rating AC: 250 V (exact match required)
Voltage Rating DC: 125 V (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these electrical and mechanical parameters. Differences in breaking capacity, melting I²t, DC cold resistance, and approval agencies reflect manufacturing variations between series and packaging configurations but do not affect functional substitution within the specified parameter set.

Parameter Comparison

Parameter	0332003.MXP	0314003.MXP	0314003.HXP	0314003.VXP	0332003.HXP
Current Rating (A)	3	3	3	3	3
Voltage Rating AC (V)	250	250	250	250	250
Voltage Rating DC (V)	125	125	125	125	125
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow	Fast 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"
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the obsolete 0332003.MXP, the following active alternatives are available:

Primary Recommendation: 0314003.MXP This part is the manufacturer-recommended substitute. It maintains all electrical and mechanical parameters of the original part while offering active product status. The 0314003.MXP series provides expanded approval agency coverage (CE, CSA, K-MARK, PSE, UL) and higher breaking capacity specifications (100A AC, 10kA DC), making it suitable for applications requiring broader regulatory compliance.

Secondary Alternatives: 0314003.HXP and 0314003.VXP Both parts are parametric equivalents with identical electrical specifications and active product status. The 0314003.HXP carries approvals from CE, CSA, K-MARK, PSE, and UL. The 0314003.VXP carries approvals from CE, CSA, KC, PSE, and UL. Selection between these variants depends on specific regional compliance requirements.

Tertiary Alternative: 0332003.HXP This part maintains the original 332 series designation but is also classified as obsolete. While electrically equivalent, it offers no procurement advantage over the active 0314003 series alternatives.

Frequently Asked Questions (FAQ)

Q: Can 0314003.MXP directly replace 0332003.MXP in existing applications? A: Yes. Both parts meet identical electrical parameters (3 A, 250 V AC, 125 V DC, fast-blow ceramic cartridge) and mechanical specifications (3AB/3AG package, 1/4" x 1-1/4" dimensions). The 0314003.MXP is the manufacturer-recommended substitute.

Q: What is the difference between 0314003.MXP, 0314003.HXP, and 0314003.VXP? A: All three parts are electrically and mechanically identical. Differences exist only in approval agency certifications and packaging configurations. Selection should be based on regional regulatory requirements and existing supply chain preferences.

Q: Why is the breaking capacity different between 0332003.MXP and 0314003.MXP? A: The 0332003.MXP specifies 100A breaking capacity, while 0314003.MXP specifies 100A AC and 10kA DC. These differences reflect manufacturing improvements in the 314 series but do not affect functional substitution within the specified electrical parameters.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed alternatives, including the original 0332003.MXP, are ROHS3 compliant.

Q: What holder types are compatible with these fuses? A: All parts in this comparison require a compatible holder and are designed for 3AB and 3AG holder formats with 1/4" x 1-1/4" dimensions.

Q: Should I prioritize active product status when selecting a substitute? A: Yes. The 0314003.MXP, 0314003.HXP, and 0314003.VXP are all active products with ongoing manufacturer support. The 0332003.HXP, while electrically equivalent, is obsolete and should not be selected for new designs or long-term procurement.

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