Equivalent & Substitute Parts for 5MTP 2.5-R

Part Overview

The 5MTP 2.5-R is a 2.5 A 250 V AC/DC fuse cartridge manufactured by Bel Fuse Inc. in a glass through-hole package with 5mm x 20mm (axial) dimensions. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

5MTP 2.5-R

Bel Fuse Inc.In Stock: 8745MTP 2.5-R Datasheet

Current PartRFQ

023402.5MXEP

Littelfuse Inc.In Stock: 840023402.5MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MTP 2.5-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Response Time: Medium Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 100 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute part 023402.5MXEP from Littelfuse Inc. meets all mandatory electrical and mechanical parameters for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The 023402.5MXEP from Littelfuse Inc. is the direct equivalent for the obsolete 5MTP 2.5-R. Selection is based on:

• Product Status: 023402.5MXEP is active and in production, ensuring long-term availability
• Regulatory Compliance: Both parts maintain ROHS3 and REACH compliance; 023402.5MXEP carries expanded approval certifications (UL, K-MARK) in addition to CE, CSA, and PSE
• Electrical and Mechanical Equivalence: All critical parameters match exactly, including current rating, voltage rating, fuse type, package dimensions, response time, and breaking capacity
• Temperature Performance: Both parts operate across the identical -55°C ~ 125°C range

Frequently Asked Questions (FAQ)

Q: Can 023402.5MXEP be used as a direct replacement for 5MTP 2.5-R?

A: Yes. The 023402.5MXEP meets all mandatory electrical and mechanical specifications for direct substitution, including current rating, voltage rating, fuse type, package dimensions, response time, and breaking capacity.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist. The 5MTP 2.5-R measures 0.217" Dia x 0.827" L (5.50mm x 21.00mm), while the 023402.5MXEP measures 0.228" Dia x 0.886" L (5.80mm x 22.50mm). Both conform to the 5mm x 20mm (Axial) package classification and are compatible with standard through-hole fuse holders designed for this package type.

Q: What is the difference in melting I²t values?

A: The 5MTP 2.5-R has a melting I²t of 35, while the 023402.5MXEP has a melting I²t of 17.045. Both parts maintain the same response time classification (Medium Blow) and breaking capacity (100 A @ rated voltage).

Q: Are regulatory certifications equivalent?

A: Both parts are ROHS3 compliant and REACH unaffected. The 023402.5MXEP carries additional certifications (UL, K-MARK) beyond the CE, CSA, and PSE approvals shared with the 5MTP 2.5-R, providing broader market acceptance.

Q: What is the DC cold resistance difference?

A: The 5MTP 2.5-R has a DC cold resistance of 0.039 Ohms, while the 023402.5MXEP has 0.0521 Ohms. Both values are within acceptable ranges for fuse cartridges of this current rating.