Littelfuse 0672.500MXEP Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0672.500MXEP is a 500 mA, 250 V AC/DC fast-blow glass cartridge fuse with axial through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing system maintenance. The glass cartridge construction provides visual indication of fuse status and is suitable for applications requiring fast response characteristics.

Substiute Parts

0672.500MXEP

Littelfuse Inc.In Stock: 12420672.500MXEP Datasheet

Current PartRFQ

0874.500MXEP

Littelfuse Inc.In Stock: 27240874.500MXEP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0672.500MXEP is determined by the following critical electrical and mechanical parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Cartridge, Non-Standard (Axial) (exact match required)

The Littelfuse 0874.500MXEP qualifies as a direct substitute because it maintains all critical electrical parameters and mounting specifications. The primary difference is the cartridge material (ceramic versus glass), which does not affect electrical performance within the specified parameters but represents an active product with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0874.500MXEP is the designated substitute for the obsolete 0672.500MXEP. Selection is based on the following factors:

• Both parts maintain identical electrical specifications: 500 mA current rating, 250 V AC voltage rating, and 50 A breaking capacity.
• Both parts are ROHS3 compliant and carry recognized safety certifications (CSA/UL for the original; cULus for the substitute).
• The 0874.500MXEP is an active product with current manufacturing availability, ensuring supply chain continuity.
• The ceramic cartridge construction of the substitute provides equivalent electrical performance while offering improved mechanical durability compared to glass.
• Physical dimensions differ slightly; verify mechanical fit within the application's fuse holder or socket before implementation.

Frequently Asked Questions (FAQ)

Q: Can the 0874.500MXEP be used as a direct replacement for the 0672.500MXEP?

A: Yes. Both parts share identical electrical ratings (500 mA, 250 V AC, fast-blow response, 50 A breaking capacity) and mounting specifications (through-hole, axial cartridge). The primary difference is cartridge material (ceramic versus glass), which does not affect electrical performance.

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

A: Glass cartridges provide visual indication of fuse status through transparency. Ceramic cartridges offer improved mechanical strength and thermal stability. Both materials perform identically within the specified electrical parameters.

Q: Are there physical compatibility concerns when substituting the 0874.500MXEP?

A: The substitute part has slightly smaller dimensions (0.142" Dia x 0.394" L versus 0.154" Dia x 0.433" L). Verify that the fuse holder or socket accommodates the smaller cartridge diameter and length before installation.

Q: Do both parts carry the same safety certifications?

A: The original part carries CSA and UL approvals. The substitute carries cULus certification, which encompasses both Canadian and U.S. standards. Both certifications are recognized for industrial and commercial applications.

Q: What is the operating temperature range for the substitute part?

A: The 0874.500MXEP operates across -55°C to 125°C. The original part's operating temperature range is not specified in the available documentation.

Q: Are both parts RoHS compliant?

A: Yes. Both the 0672.500MXEP and 0874.500MXEP are ROHS3 compliant and REACH unaffected.