Littelfuse 0332004.VXP Ceramic Fuse 4A 250VAC 125VDC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0332004.VXP is a 4 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation, designed for use with 3AB, 3AG holder types in a 1/4" x 1-1/4" form factor. This part operates across a temperature range of -55°C to 125°C with fast-blow response characteristics and is ROHS3 compliant with CE, cULus, and PSE approvals.

The 0332004.VXP carries an obsolete product status. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring this fuse specification.

Key Parameters

Parameter	Value
Current Rating	4 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"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0332004.VXP is determined by strict alignment of the following parameters:

Current Rating: 4 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)
Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these core electrical and mechanical parameters. Differences in breaking capacity, melting I²t, DC cold resistance, and approval agency certifications are noted in the parameter comparison table.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Current Rating	Voltage AC	Voltage DC	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance	Approval Agency
0332004.VXP	Littelfuse Inc.	332	Obsolete	4 A	250 V	125 V	100A	3.36	0.0179 Ohms	CE, cULus, PSE
0314004.VXP	Littelfuse Inc.	314	Active	4 A	250 V	125 V	750A AC, 10kA DC	10.4	0.047 Ohms	CE, CSA, KC, PSE, UL
0314004.HXP	Littelfuse	314	Active	4 A	250 V	125 V	750A AC, 10kA DC	10.4	0.047 Ohms	CE, CSA, K-MARK, PSE, UL
0314004.MXP	Littelfuse Inc.	314	Active	4 A	250 V	125 V	750A AC, 10kA DC	10.4	0.047 Ohms	CE, CSA, K-MARK, PSE, UL
0332004.HXP	Littelfuse Inc.	332	Obsolete	4 A	250 V	125 V	100A	3.36	0.0179 Ohms	CE, cULus, PSE

Engineering Selection Recommendations

For applications currently using the obsolete 0332004.VXP, the active-status alternatives 0314004.VXP, 0314004.HXP, and 0314004.MXP from the 314 series provide direct electrical and mechanical compatibility while offering enhanced breaking capacity specifications and expanded approval certifications including UL and CSA.

The 314 series parts maintain identical current, voltage, and physical dimensions while providing superior performance characteristics. These parts carry active product status, ensuring long-term supply availability and support.

The 0332004.HXP remains an alternative within the same 332 series but shares the obsolete product status of the original part. Selection of 314 series substitutes is preferred for new designs and ongoing production requirements.

All substitute parts maintain ROHS3 compliance and operate within the specified -55°C to 125°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 0314004.VXP, 0314004.HXP, and 0314004.MXP be used interchangeably with the 0332004.VXP?

A: Yes. All three parts meet the core electrical parameters (4 A, 250 V AC, 125 V DC, fast-blow response) and physical dimensions (0.250" Dia x 1.250" L, 3AB/3AG holder compatibility). The primary differences are breaking capacity and approval certifications, not functional compatibility in the specified voltage and current range.

Q: What is the difference between the 314 and 332 series fuses?

A: Both series meet the same electrical and mechanical specifications for this 4 A rating. The 314 series offers higher breaking capacity (750A AC, 10kA DC versus 100A) and broader approval certifications (UL, CSA, K-MARK in addition to CE and PSE). The 332 series is obsolete; the 314 series is active.

Q: Are there differences in holder compatibility?

A: No. All parts use the same 3AB, 3AG holder types and maintain identical 1/4" x 1-1/4" dimensions. Physical installation is identical.

Q: What does the suffix (VXP, HXP, MXP) indicate?

A: The suffix designates packaging and internal construction variants within the same electrical specification. All variants listed meet the 4 A, 250 V AC, 125 V DC parameters and are mechanically compatible.

Q: Should I select a 314 series part over the 332 series?

A: For new applications and ongoing production, 314 series parts are recommended due to active product status and enhanced breaking capacity. The 332 series is obsolete and should be replaced in existing designs where feasible.

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