Littelfuse 0672007.MXEP Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0672007.MXEP is a 7A 250VAC fast-blow glass cartridge fuse with axial through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. The part features a non-standard axial cartridge form factor with CSA and UL approval certifications.

Substiute Parts

0672007.MXEP

Littelfuse Inc.In Stock: 7050672007.MXEP Datasheet

Current PartRFQ

0874007.MXEP

Littelfuse Inc.In Stock: 11420874007.MXEP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0672007.MXEP is determined by the following critical parameters that must remain constant:

• Current Rating: 7 A
• Voltage Rating (AC): 250 V
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Breaking Capacity @ Rated Voltage: 50 A
• Approval Agency: Regulatory certifications (CSA, UL, or cULus)
• RoHS Status: ROHS3 Compliant

The primary difference between the main part and its substitute lies in the cartridge material composition (glass versus ceramic) and minor dimensional variations. Both maintain identical electrical performance characteristics and regulatory compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

The 0874007.MXEP ceramic cartridge fuse serves as the active production equivalent to the obsolete 0672007.MXEP glass cartridge fuse. Both components maintain identical electrical ratings (7A, 250VAC, 50A breaking capacity) and fast-blow response characteristics required for circuit protection applications.

The substitute part carries cULus certification, which encompasses both CSA and UL approval standards, providing equivalent regulatory compliance. The ceramic construction of the 0874007.MXEP offers improved thermal stability with an operating temperature range of -55°C to 125°C, compared to the glass variant.

Dimensional differences are minor (0.154" to 0.142" diameter; 0.433" to 0.394" length), and both maintain through-hole axial mounting compatibility. The slightly higher melting I²t value (36.9 versus 25.8) in the ceramic variant reflects material properties while preserving the fast-blow response classification.

Frequently Asked Questions (FAQ)

Q: Can the 0874007.MXEP directly replace the 0672007.MXEP in existing designs?

A: Yes. Both components share identical current rating (7A), voltage rating (250VAC), response time (fast-blow), breaking capacity (50A), and mounting type (through-hole axial). The ceramic construction of the substitute provides equivalent electrical performance with enhanced thermal characteristics.

Q: What is the significance of the glass-to-ceramic material change?

A: The material change from glass to ceramic does not affect electrical performance or circuit protection function. Ceramic cartridges offer improved thermal stability and durability. Both materials are approved for the same voltage and current ratings.

Q: Are there dimensional compatibility concerns?

A: Minor dimensional variations exist (diameter: 0.154" to 0.142"; length: 0.433" to 0.394"). These differences are within typical mechanical tolerances for through-hole cartridge fuse mounting. Verify mechanical fit within your specific socket or holder design.

Q: Does the substitute part maintain regulatory compliance?

A: Yes. The 0874007.MXEP carries cULus certification, which satisfies both CSA and UL requirements. Both the main part and substitute are ROHS3 compliant.

Q: Why is the melting I²t value different between the two parts?

A: The melting I²t difference (25.8 versus 36.9) reflects the thermal properties of glass versus ceramic materials. Both values are consistent with fast-blow fuse classification and do not indicate a change in response time or circuit protection characteristics.