Littelfuse 0332003.VXP Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0332003.VXP is a 3 A, 250 V AC / 125 V DC ceramic cartridge fuse with fast-blow response characteristics, designed for 3AB, 3AG holder compatibility. This component operates across a temperature range of -55°C to 125°C and meets CE, cULus, and PSE approval standards.

The 0332003.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	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)
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0332003.VXP is determined by the following critical 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 series designation, approval agencies, melting I²t values, and DC cold resistance reflect manufacturing variations within the same functional specification.

Parameter Comparison

Parameter	0332003.VXP (Main)	0314003.VXP	0314003.HXP	0314003.MXP	0332003.HXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse	Littelfuse Inc.
Series	332	314	314	314	332
Product Status	Obsolete	Active	Active	Active	Obsolete
Current Rating (Amps)	3 A	3 A	3 A	3 A	3 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V
Voltage Rating - DC	125 V	125 V	125 V	125 V	125 V
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"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Breaking Capacity @ Rated Voltage	100 A	100 A AC, 10 kA DC	100 A AC, 10 kA DC	100 A AC, 10 kA DC	100 A
Melting I²t	1.89	14.6	14.6	14.6	1.89
DC Cold Resistance	0.0245 Ohms	0.0432 Ohms	0.0432 Ohms	0.0432 Ohms	0.0245 Ohms
Approval Agency	CE, cULus, PSE	CE, CSA, KC, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, cULus, PSE
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: 0314003.VXP, 0314003.HXP, or 0314003.MXP

The Series 314 variants (0314003.VXP, 0314003.HXP, 0314003.MXP) are preferred substitutes for the obsolete 0332003.VXP. All three maintain identical electrical specifications and mechanical compatibility. The Series 314 parts carry Active product status, ensuring long-term availability and supply chain stability. These parts feature expanded approval certifications (CSA, UL, KC, K-MARK) compared to the original part, providing broader regulatory compliance for international applications.

Secondary Recommendation: 0332003.HXP

The 0332003.HXP remains within the same Series 332 as the original part and shares identical melting I²t and DC cold resistance characteristics. However, this part also carries Obsolete status, limiting its suitability for new designs or long-term supply assurance.

Compliance Considerations

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating. The Series 314 variants provide enhanced regulatory coverage through additional approval agencies, supporting applications requiring CSA, UL, or KC certification.

Frequently Asked Questions (FAQ)

Q: Can the 0314003.VXP directly replace the 0332003.VXP?

A: Yes. The 0314003.VXP meets all electrical and mechanical parameters of the 0332003.VXP, including current rating (3 A), voltage ratings (250 V AC / 125 V DC), fuse type (ceramic cartridge), response time (fast blow), and package compatibility (3AB, 3AG, 1/4" x 1-1/4"). Physical dimensions and operating temperature range are identical.

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

A: Both series meet the same electrical specifications for this 3 A, 250 V AC / 125 V DC application. The primary difference is product status: Series 314 parts are Active, while Series 332 parts are Obsolete. Series 314 variants also feature higher breaking capacity on DC (10 kA versus 100 A) and higher melting I²t values (14.6 versus 1.89), reflecting design improvements in the newer series.

Q: Are there compatibility concerns with different approval agencies?

A: No. The substitute parts listed carry broader approval certifications (CE, CSA, UL, KC, K-MARK, PSE) compared to the original part (CE, cULus, PSE). This expanded certification coverage ensures compatibility with applications requiring specific regulatory approvals.

Q: Which substitute should I select for new designs?

A: For new designs, select from the Series 314 Active parts: 0314003.VXP, 0314003.HXP, or 0314003.MXP. These parts provide long-term supply assurance and enhanced regulatory compliance. All three are functionally equivalent; selection may depend on packaging preference (Bulk) and local availability.

Q: Is the difference in melting I²t significant for circuit protection?

A: The melting I²t difference (1.89 for Series 332 versus 14.6 for Series 314) reflects manufacturing improvements in thermal response characteristics. Both values remain within acceptable parameters for the 3 A, 250 V AC / 125 V DC specification. The higher I²t of Series 314 parts indicates improved thermal stability without affecting the fuse's protective function at rated current.

Q: Can I use these fuses in applications requiring DC operation?

A: Yes. All listed parts are rated for 125 V DC operation and maintain identical DC cold resistance specifications within their respective series. Series 314 parts feature enhanced DC breaking capacity (10 kA) compared to Series 332 parts (100 A), providing superior protection in DC circuits.

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