Littelfuse 0332003.HXP Ceramic Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0332003.HXP is a 3 A ceramic fuse cartridge rated for 250 V AC and 125 V DC operation. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and system maintenance. The fuse features fast-blow response characteristics and requires a compatible holder (3AB, 3AG format). Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without system redesign.

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 of the 0332003.HXP is determined by strict equivalence across the following critical parameters:

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

All substitute parts listed below meet these criteria and are classified as active products, providing long-term availability compared to the obsolete 0332003.HXP.

Parameter Comparison

Parameter	0332003.HXP (Main)	0314003.HXP	0314003.MXP	0314003.VXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse	Littelfuse Inc.
Series	332	314	314	314
Product Status	Obsolete	Active	Active	Active
Current Rating (Amps)	3 A	3 A	3 A	3 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	125 V	125 V	125 V	125 V
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	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"
Breaking Capacity @ Rated Voltage	100 A	100 A AC, 10 kA DC	100 A AC, 10 kA DC	100 A AC, 10 kA DC
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CE, cULus, PSE	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

All three substitute parts (0314003.HXP, 0314003.MXP, 0314003.VXP) are direct functional equivalents to the obsolete 0332003.HXP. Selection among these active alternatives should be based on the following factors:

Certification Requirements: The 0314003.HXP, 0314003.MXP, and 0314003.VXP all carry expanded regulatory approvals (UL, CSA, K-MARK or KC) compared to the original part. Verify that the specific certifications required by your application are present in the selected substitute.

Product Availability: All three substitute parts are classified as active products with current inventory. The 0314003.HXP offers the highest inventory level (2673 pcs), followed by 0314003.MXP (1633 pcs) and 0314003.VXP (1132 pcs).

Electrical Performance: The substitute parts feature enhanced breaking capacity at DC voltage (10 kA DC versus unspecified for the original), providing improved fault protection margins.

Interchangeability: All substitute parts are mechanically and electrically interchangeable with the 0332003.HXP within existing 3AB/3AG holder assemblies.

Frequently Asked Questions (FAQ)

Q: Can the 0314003.HXP, 0314003.MXP, or 0314003.VXP be used as direct replacements for the 0332003.HXP?

A: Yes. All three parts are direct functional equivalents. They share identical current ratings (3 A), voltage ratings (250 V AC / 125 V DC), fuse type (ceramic cartridge), response characteristic (fast blow), and mechanical package (3AB, 3AG, 1/4" x 1-1/4"). They mount in the same holder assemblies without modification.

Q: What is the difference between the three substitute parts?

A: The 0314003.HXP, 0314003.MXP, and 0314003.VXP are parametrically equivalent. Differences exist only in regulatory certifications and inventory levels. The 0314003.HXP carries K-MARK certification, 0314003.MXP carries K-MARK certification, and 0314003.VXP carries KC certification. Select based on your regional compliance requirements.

Q: Why does the original 0332003.HXP show a breaking capacity of 100 A while the substitutes specify 100 A AC and 10 kA DC?

A: The substitute parts provide more detailed breaking capacity specifications. The enhanced DC breaking capacity (10 kA) represents an improvement in fault protection capability and does not affect compatibility or interchangeability.

Q: Are these parts RoHS compliant?

A: Yes. All parts, including the original 0332003.HXP and all three substitutes, are ROHS3 compliant.

Q: What is the operating temperature range for these fuses?

A: All parts operate across the range of -55°C to 125°C, ensuring compatibility across standard industrial and commercial temperature environments.

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