Littelfuse 0672004.MXEP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0672004.MXEP is a 4 A 250 V AC DC fast-blow glass cartridge fuse with axial through-hole mounting. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance and component procurement. The part features a non-standard axial cartridge form factor with CSA and UL approval certifications.

Substiute Parts

0672004.MXEP

Littelfuse Inc.In Stock: 9400672004.MXEP Datasheet

Current PartRFQ

0874004.MXEP

Littelfuse Inc.In Stock: 23420874004.MXEP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0874004.MXEP qualifies as a direct substitute for the 0672004.MXEP based on the following critical parameters:

Matching Parameters:

• Current Rating: 4 A (identical)
• Voltage Rating (AC): 250 V (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: Cartridge, Non-Standard (Axial) (identical)
• Breaking Capacity @ Rated Voltage: 50 A (identical)
• Manufacturer: Littelfuse Inc. (same manufacturer)
• RoHS Status: ROHS3 Compliant (identical)

Functional Difference: The substitute part uses ceramic construction instead of glass construction. Both materials are approved cartridge fuse types within the same electrical performance class and meet identical electrical specifications for this application.

Parameter Comparison

Engineering Selection Recommendations

The 0874004.MXEP is the manufacturer-recommended substitute for the obsolete 0672004.MXEP. Both parts maintain identical electrical performance specifications: 4 A current rating, 250 V AC voltage rating, fast-blow response, and 50 A breaking capacity. The substitute part is currently in active production status with 2307 units in stock, compared to the obsolete main part with 858 units remaining.

The ceramic construction of the substitute part provides equivalent functional performance to the glass construction of the original part within this electrical class. The substitute carries cULus certification, which encompasses both CSA and UL approvals required for the original part. Both parts are ROHS3 compliant and REACH unaffected.

Physical dimensions differ slightly between the parts. The substitute is marginally smaller (0.142" diameter vs. 0.154", and 0.394" length vs. 0.433"). Verify mechanical fit within the PCB or chassis mounting location before final selection. The substitute part specifies an operating temperature range of -55°C to 125°C, whereas the original part does not specify this parameter.

Frequently Asked Questions (FAQ)

Q: Can the 0874004.MXEP directly replace the 0672004.MXEP in all applications?

A: The 0874004.MXEP is electrically equivalent and meets all specified electrical parameters. Verify physical dimensions fit the mounting location, as the substitute is slightly smaller in both diameter and length.

Q: What is the difference between glass and ceramic cartridge fuses?

A: Both glass and ceramic are approved cartridge fuse materials within this electrical performance class. The substitute ceramic construction maintains identical current rating, voltage rating, breaking capacity, and response time characteristics.

Q: Are the certifications equivalent between the two parts?

A: The original part carries CSA and UL certifications. The substitute carries cULus certification, which encompasses both CSA and UL approvals. Both parts meet the same regulatory requirements.

Q: Why are the physical dimensions different?

A: The substitute part uses a slightly more compact form factor while maintaining the same non-standard axial cartridge package type and electrical specifications. Confirm mechanical compatibility with your specific mounting configuration.

Q: What is the significance of the different Melting I²t values?

A: The Melting I²t values (8.86 for the original, 10.03 for the substitute) reflect the thermal characteristics of each fuse element. Both parts maintain identical fast-blow response time and current rating specifications for this application.

Q: Is the substitute part currently available?

A: Yes. The 0874004.MXEP is in active production status with 2307 units in stock, whereas the original 0672004.MXEP is obsolete with limited remaining inventory.