5MTP 3-R Equivalent & Substitute Parts

Part Overview

The 5MTP 3-R is a 3A 250VAC glass cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor applications. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. The fuse provides medium-blow response characteristics suitable for general circuit protection applications requiring AC/DC rated protection at 250V.

Substiute Parts

5MTP 3-R

Bel Fuse Inc.In Stock: 9965MTP 3-R Datasheet

Current PartRFQ

0234003.MXEP

Littelfuse Inc.In Stock: 7530234003.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 0234003.MXEP from Littelfuse Inc. qualifies as a direct substitute based on the following critical parameters:

• Current Rating: 3 A (identical)
• Voltage Rating (AC): 250 V (identical)
• Fuse Type: Cartridge, Glass (identical)
• Package / Case: 5mm x 20mm (Axial) (identical)
• Response Time: Medium Blow (identical)
• Mounting Type: Through Hole (identical)
• Breaking Capacity @ Rated Voltage: 100A (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)

These parameters define the functional and mechanical compatibility requirements for cartridge fuse substitution in this application category.

Parameter Comparison

Engineering Selection Recommendations

The 0234003.MXEP from Littelfuse Inc. is the direct equivalent for the obsolete 5MTP 3-R. Selection is based on:

• Identical electrical ratings (3A, 250VAC)
• Identical mechanical form factor (5mm x 20mm through-hole cartridge)
• Identical response characteristics (medium-blow)
• Active product status ensuring ongoing availability
• Full compliance with RoHS3 and REACH requirements
• Approval certifications including CE, CSA, K-MARK, PSE, and UL

The substitute part maintains all critical functional parameters required for direct replacement in existing circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the 0234003.MXEP be used as a direct replacement for the 5MTP 3-R?

A: Yes. Both components share identical current ratings (3A), voltage ratings (250VAC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium-blow), and operating temperature range (-55°C to 125°C). The 0234003.MXEP is mechanically and electrically compatible for direct substitution.

Q: What is the primary reason for seeking a substitute?

A: The 5MTP 3-R is classified as obsolete. The 0234003.MXEP is an active product from Littelfuse Inc., ensuring reliable supply chain availability for new designs and maintenance applications.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The 0234003.MXEP carries additional certifications (K-MARK, UL) beyond the 5MTP 3-R, providing broader regulatory acceptance.

Q: What are the physical dimension tolerances?

A: The 5MTP 3-R measures 0.217" diameter x 0.827" length (5.50mm x 21.00mm). The 0234003.MXEP measures 0.228" diameter x 0.886" length (5.80mm x 22.50mm). Both fit the 5mm x 20mm package classification and are compatible with standard through-hole fuse holders designed for this form factor.

Q: Are there differences in electrical characteristics?

A: The melting I²t values differ (5MTP 3-R: 58 vs. 0234003.MXEP: 26.24) and DC cold resistance values differ (5MTP 3-R: 0.035 Ohms vs. 0234003.MXEP: 0.0431 Ohms). Both parts maintain identical response time classification (medium-blow) and breaking capacity (100A at rated voltage). These variations are within acceptable tolerances for cartridge fuse substitution.