Littelfuse 0326030.VXP Ceramic Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0326030.VXP is a 30 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation. This slow-blow fuse is designed for applications requiring holder-based installation in 3AB, 3AG, or 1/4" x 1-1/4" form factors. The part maintains active product status with full compliance to CE, CSA, PSE, and UL approval agencies. Substitute parts are identified to provide alternative sourcing options while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Manufacturer	Littelfuse Inc.
Series	326
Current Rating	30 A
Voltage Rating - AC	250 V
Voltage Rating - DC	125 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow 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)
Breaking Capacity @ Rated Voltage	400A AC, 600A DC
Melting I²t	1690
DC Cold Resistance	0.0019 Ohms
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the 0326030.VXP are identified as parametric equivalents within the Littelfuse 326 series. Substitution is valid when all of the following criteria are met:

Current Rating: 30 A
Voltage Rating - AC: 250 V
Voltage Rating - DC: 125 V
Fuse Type: Cartridge, Ceramic
Response Time: Slow 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)
Breaking Capacity @ Rated Voltage: 400A AC, 600A DC
Melting I²t: 1690
DC Cold Resistance: 0.0019 Ohms
Operating Temperature Range: -55°C ~ 125°C
RoHS Status: ROHS3 Compliant

The identified substitutes maintain identical electrical performance and mechanical compatibility with the main part number.

Parameter Comparison

Parameter	0326030.VXP	0326030.HXP	0326030.MXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Series	326	326	326
Current Rating (Amps)	30 A	30 A	30 A
Voltage Rating - AC	250 V	250 V	250 V
Voltage Rating - DC	125 V	125 V	125 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"	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)
Breaking Capacity @ Rated Voltage	400A AC, 600A DC	400A AC, 600A DC	400A AC, 600A DC
Melting I²t	1690	1690	1690
DC Cold Resistance	0.0019 Ohms	0.0019 Ohms	0.0019 Ohms
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active
Approval Agency	CE, CSA, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL

Engineering Selection Recommendations

All three part numbers—0326030.VXP, 0326030.HXP, and 0326030.MXP—are active products from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts may be based on approval agency requirements and regional compliance needs.

The 0326030.VXP carries CE, CSA, PSE, and UL certifications. The 0326030.HXP and 0326030.MXP both include K-MARK certification in addition to CE, CSA, PSE, and UL approvals. Applications requiring K-MARK compliance should specify 0326030.HXP or 0326030.MXP.

All parts are ROHS3 compliant and REACH unaffected, suitable for applications with environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can 0326030.HXP or 0326030.MXP be used as direct replacements for 0326030.VXP?

A: Yes. All three part numbers share identical electrical ratings (30 A, 250 V AC, 125 V DC), fuse type (ceramic cartridge), response time (slow blow), mechanical dimensions (0.250" Dia x 1.250" L), and breaking capacity (400A AC, 600A DC). They are mechanically and electrically interchangeable.

Q: What is the difference between these substitute parts?

A: The primary difference is in approval agency certifications. The 0326030.HXP and 0326030.MXP include K-MARK certification, while the 0326030.VXP does not. All other specifications are identical.

Q: Are these fuses compatible with 3AB and 3AG holders?

A: Yes. All three part numbers are specified for use with 3AB, 3AG, or 1/4" x 1-1/4" holders. The physical dimensions (0.250" Dia x 1.250" L) ensure compatibility with these standard holder types.

Q: What is the melting I²t value, and why is it important?

A: The melting I²t value is 1690 for all three parts. This parameter defines the thermal energy required to melt the fuse element and is critical for circuit protection coordination. All substitutes maintain this identical value.

Q: Are these fuses suitable for DC applications?

A: Yes. All three parts are rated for 125 V DC operation with a breaking capacity of 600A DC. They are suitable for both AC and DC circuits within their rated specifications.

Q: What is the operating temperature range?

A: All three parts operate across -55°C to 125°C. This range covers standard industrial and commercial applications.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

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