Littelfuse 0672001.MXEP Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0672001.MXEP is a 1 A, 250 V AC/DC fast-blow glass cartridge fuse with axial through-hole mounting. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The part features a non-standard axial cartridge form factor with a breaking capacity of 50 A at rated voltage and is RoHS3 compliant with CSA and UL approvals.

Substiute Parts

0672001.MXEP

Littelfuse Inc.In Stock: 7490672001.MXEP Datasheet

Current PartRFQ

0874001.MXEP

LittelfuseIn Stock: 12560874001.MXEP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0672001.MXEP is determined by the following critical parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Cartridge, Non-Standard (Axial) (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)

The Littelfuse 0874001.MXEP qualifies as a substitute because it maintains all critical electrical and mechanical parameters. The primary difference is the cartridge material (ceramic versus glass) and minor dimensional variations, which do not affect functional compatibility in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0874001.MXEP is the manufacturer-recommended substitute for the obsolete 0672001.MXEP. Both components maintain identical electrical ratings (1 A, 250 V AC/DC, fast-blow response, 50 A breaking capacity) and mounting configuration (through-hole axial cartridge).

The 0874001.MXEP offers the advantage of active product status, ensuring continued availability and supply chain reliability. The ceramic cartridge construction provides enhanced thermal stability with a specified operating temperature range of -55°C to 125°C. Both parts carry RoHS3 compliance and appropriate regulatory approvals (cULus for the substitute versus CSA/UL for the original).

Minor dimensional differences (0.142" Dia x 0.394" L versus 0.154" Dia x 0.433" L) and the lower melting I²t value (0.406 versus 0.508) do not compromise functional compatibility in applications originally designed for the 0672001.MXEP, provided mechanical clearance is confirmed in the host assembly.

Frequently Asked Questions (FAQ)

Q: Can the 0874001.MXEP be used as a direct replacement for the 0672001.MXEP?

A: Yes. Both components share identical current rating (1 A), voltage rating (250 V AC), response time (fast blow), mounting type (through hole), and breaking capacity (50 A). The substitute is manufacturer-recommended and maintains functional compatibility.

Q: What is the primary difference between these two fuses?

A: The main difference is the cartridge material. The 0672001.MXEP uses glass construction, while the 0874001.MXEP uses ceramic construction. The ceramic variant offers a defined operating temperature range (-55°C to 125°C) and is currently in active production status.

Q: Are there dimensional compatibility concerns?

A: The 0874001.MXEP is slightly smaller (0.142" Dia x 0.394" L) compared to the original (0.154" Dia x 0.433" L). Mechanical clearance in the fuse holder or socket must be confirmed before implementation. The axial through-hole mounting configuration remains unchanged.

Q: Do both parts meet the same regulatory standards?

A: Both parts are RoHS3 compliant. The original carries CSA and UL approvals, while the substitute carries cULus approval. Both meet applicable regulatory requirements for their respective product statuses.

Q: Why is the 0672001.MXEP listed as obsolete?

A: The original part has been discontinued by the manufacturer. The 0874001.MXEP represents the active, supported alternative for new designs and ongoing maintenance applications.