Littelfuse 0326020.MXDP Ceramic Cartridge Fuse — Equivalent & Substitute Parts

Part Overview

The Littelfuse 0326020.MXDP is a 20 A ceramic cartridge fuse rated for 250 V AC and 60 V DC operation. This slow-blow fuse is designed for applications requiring reliable overcurrent protection in industrial and commercial equipment. The part is actively manufactured and maintains full compliance with international safety standards including CE, CSA, and UL certifications. Substitute parts are identified based on identical electrical ratings, mechanical compatibility, and functional performance characteristics.

Substiute Parts

0326020.MXDP

Littelfuse Inc.In Stock: 13220326020.MXDP Datasheet

Current PartRFQ

0326020.HXP

Littelfuse Inc.In Stock: 78820326020.HXP Datasheet

Parametric EquivalentRFQ

0326020.MXP

Littelfuse Inc.In Stock: 2203670326020.MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0326020.MXDP are qualified based on the following critical parameters that determine functional interchangeability:

• Current Rating: 20 A (exact match required)
• Voltage Ratings: 250 V AC and 60 V DC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Breaking Capacity: 400 A AC, 500 A DC (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Mounting Type: Requires Holder (exact match required)

The identified substitute parts 0326020.HXP and 0326020.MXP meet all critical electrical and mechanical parameters. Both parts are manufactured by Littelfuse Inc., carry active product status, and maintain full compliance with international safety standards.

Parameter Comparison

Engineering Selection Recommendations

All three parts—0326020.MXDP, 0326020.HXP, and 0326020.MXP—are active products from Littelfuse Inc. and are fully qualified for direct substitution based on identical electrical ratings, mechanical dimensions, and breaking capacity specifications.

The 0326020.HXP and 0326020.MXP carry expanded approval certifications including K-MARK and PSE in addition to CE, CSA, and UL, providing broader geographic compliance coverage for international applications.

Selection between these parts should be based on availability, lead time, and regional certification requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can 0326020.HXP or 0326020.MXP be used as direct replacements for 0326020.MXDP?

A: Yes. Both parts are direct substitutes. They share identical current ratings (20 A), voltage ratings (250 V AC, 60 V DC), fuse type (ceramic cartridge), response time (slow blow), mechanical dimensions (1/4" x 1-1/4"), and breaking capacity (400 A AC, 500 A DC). All three parts are compatible with 3AB and 3AG fuse holders.

Q: Are there differences in electrical performance between these parts?

A: The parts differ in melting I²t values and DC cold resistance. The 0326020.MXDP has a melting I²t of 1900 and DC cold resistance of 0.0042 Ohms. The 0326020.HXP and 0326020.MXP both have melting I²t of 575 and DC cold resistance of 0.034 Ohms. These differences do not affect substitution eligibility for applications designed around the 20 A, 250 V AC, 60 V DC specification.

Q: Do all three parts require the same holder?

A: Yes. All three parts use the 3AB, 3AG package format and require a compatible fuse holder. The mechanical dimensions are identical: 0.250" diameter by 1.250" length (6.35mm x 31.75mm).

Q: What certifications apply to each part?

A: The 0326020.MXDP carries CE, CSA, and UL certifications. The 0326020.HXP and 0326020.MXP carry CE, CSA, K-MARK, PSE, and UL certifications. All parts meet ROHS3 compliance and REACH unaffected status.

Q: Are these parts suitable for both AC and DC applications?

A: Yes. All three parts are rated for 250 V AC and 60 V DC operation and are suitable for applications requiring protection in either AC or DC circuits within these voltage limits.