Littelfuse 0674005.MXEP Ceramic Axial Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0674005.MXEP is a 5A 250VAC ceramic cartridge fuse with axial through-hole mounting. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement. The fuse provides fast-blow response characteristics suitable for circuit protection applications requiring ceramic construction and non-standard axial packaging.

Substiute Parts

0674005.MXEP

Littelfuse Inc.In Stock: 11180674005.MXEP Datasheet

Current PartRFQ

0874005.MXEP

Littelfuse Inc.In Stock: 16080874005.MXEP Datasheet

DirectRFQ

0674005.MXE

Littelfuse Inc.In Stock: 11910674005.MXE Datasheet

Parametric EquivalentRFQ

0676005.MXE

Littelfuse Inc.In Stock: 8390676005.MXE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0674005.MXEP is determined by the following critical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)

All identified substitute parts meet these core electrical and mechanical requirements. Variations in secondary parameters such as melting I²t, DC cold resistance, physical dimensions within tolerance, and approval certifications do not preclude functional substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

0874005.MXEP (Direct Manufacturer Substitute - Recommended for New Designs)

The 0874005.MXEP is the primary substitute for the obsolete 0674005.MXEP. This part maintains all critical electrical parameters and is classified as active product status. It carries cULus certification and is ROHS3 compliant. The 0874005.MXEP features a specified operating temperature range of -55°C to 125°C, providing defined thermal performance. Physical dimensions differ slightly (0.142" Dia x 0.394" L versus 0.154" Dia x 0.433" L), which may require mechanical verification for PCB footprint compatibility. Melting I²t is 14.58 compared to 15.9 in the original part, representing a 8.3% reduction in thermal energy capacity.

0674005.MXE (Parametric Equivalent - Mechanical Compatibility)

The 0674005.MXE provides identical physical dimensions and melting I²t characteristics to the main part (0.154" Dia x 0.433" L and 15.9 I²t). This part maintains CSA and UL certifications. However, it is classified as RoHS non-compliant, which may restrict use in applications requiring RoHS3 compliance. Product status is active, ensuring availability.

0676005.MXE (Parametric Equivalent - Extended Certifications)

The 0676005.MXE maintains all critical electrical parameters and shares identical physical dimensions with the main part. This substitute offers the broadest certification coverage (CCC, CSA, UL, VDE), making it suitable for applications requiring international regulatory compliance. Melting I²t is 20.4, representing a 28.3% increase over the original part. DC cold resistance is 0.01 Ohms, the lowest among all options. RoHS non-compliance status applies to this part.

Frequently Asked Questions (FAQ)

Q: Can 0874005.MXEP be used as a direct replacement for 0674005.MXEP?

A: Yes. The 0874005.MXEP meets all critical electrical parameters: 5A current rating, 250V AC voltage rating, ceramic cartridge construction, fast-blow response, 50A breaking capacity, and through-hole mounting. Physical dimensions differ slightly, requiring verification that the 0.142" Dia x 0.394" L package fits the existing PCB footprint. The melting I²t is 14.58 versus 15.9, a difference of 8.3%.

Q: What is the difference between direct and parametric equivalents?

A: Direct equivalents (0874005.MXEP) are manufacturer-designated substitutes with active product status and current certifications. Parametric equivalents (0674005.MXE, 0676005.MXE) match electrical and mechanical specifications but may have different certifications, RoHS status, or thermal characteristics. All three options satisfy the core functional requirements.

Q: Does the physical dimension difference between 0874005.MXEP and the original part affect substitution?

A: Physical dimensions must be verified against the PCB layout and mechanical assembly. The 0874005.MXEP is 0.142" Dia x 0.394" L compared to 0.154" Dia x 0.433" L for the original part. If the original footprint has tight mechanical tolerances, dimensional verification is required before substitution.

Q: Which substitute part should be selected for RoHS3 compliance?

A: The 0874005.MXEP is ROHS3 compliant and is the recommended choice for applications requiring RoHS3 certification. The 0674005.MXE and 0676005.MXE are both RoHS non-compliant.

Q: How do melting I²t values affect part selection?

A: Melting I²t indicates thermal energy capacity. The 0874005.MXEP (14.58) provides 8.3% less thermal capacity than the original (15.9). The 0676005.MXE (20.4) provides 28.3% greater thermal capacity. Selection depends on circuit protection requirements and thermal stress conditions in the application.

Q: What certifications are required for my application?

A: The 0874005.MXEP carries cULus certification. The 0674005.MXE carries CSA and UL certifications. The 0676005.MXE carries CCC, CSA, UL, and VDE certifications. Verify that the selected part's certification portfolio meets your application's regulatory requirements.