5MTP 1-R Equivalent & Substitute Parts

Part Overview

The 5MTP 1-R is a 1A 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 essential for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical performance characteristics and mechanical compatibility to ensure reliable circuit protection without redesign requirements.

Substiute Parts

5MTP 1-R

Bel Fuse Inc.In Stock: 9125MTP 1-R Datasheet

Current PartRFQ

0234001.MXEP

Littelfuse Inc.In Stock: 28210234001.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MTP 1-R is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be 1 A
• Voltage Rating (AC): Must be 250 V
• Fuse Type: Must be Cartridge, Glass
• Package / Case: Must be 5mm x 20mm (Axial)
• Mounting Type: Must be Through Hole
• Response Time: Must be Medium Blow
• Breaking Capacity @ Rated Voltage: Must be 100A
• Operating Temperature Range: Must support -55°C ~ 125°C

The substitute part 0234001.MXEP from Littelfuse Inc. meets all mandatory electrical and mechanical parameters, confirming direct substitutability for the obsolete 5MTP 1-R.

Parameter Comparison

Engineering Selection Recommendations

The 0234001.MXEP from Littelfuse Inc. is the direct equivalent substitute for the 5MTP 1-R. Both components satisfy identical electrical specifications and mechanical form factors. The substitute part carries active product status with established supply availability (2773 Pcs in stock), whereas the original part is obsolete. Both components maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Approval certifications for the substitute include CE, CSA, K-MARK, PSE, and UL, providing comprehensive international compliance coverage suitable for replacement in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the 0234001.MXEP directly replace the 5MTP 1-R without circuit modification?

A: Yes. Both components share identical current rating (1 A), voltage rating (250 V AC), fuse type (Cartridge, Glass), package dimensions (5mm x 20mm), and response characteristics (Medium Blow). Direct substitution is supported without circuit redesign.

Q: Are there dimensional differences between these fuses?

A: Minor dimensional variations exist. The 5MTP 1-R measures 0.217" Dia x 0.827" L (5.50mm x 21.00mm), while the 0234001.MXEP measures 0.228" Dia x 0.886" L (5.80mm x 22.50mm). These variations remain within standard cartridge fuse tolerances and do not affect through-hole mounting compatibility.

Q: What is the difference in melting I²t values?

A: The 5MTP 1-R has a melting I²t of 4.2, while the 0234001.MXEP has 1.975. Both components maintain Medium Blow response time classification and identical breaking capacity (100A) at rated voltage. The I²t difference reflects manufacturing process variations between manufacturers but does not affect functional equivalence for circuit protection applications.

Q: Are regulatory certifications equivalent?

A: The 5MTP 1-R holds CE, CSA, cULus, and PSE approvals. The 0234001.MXEP holds CE, CSA, K-MARK, PSE, and UL approvals. Both meet primary international standards. The substitute provides additional K-MARK certification for Korean markets and UL certification, expanding compliance coverage.

Q: What is the DC cold resistance difference?

A: The 5MTP 1-R has 0.177 Ohms DC cold resistance, while the 0234001.MXEP has 0.175 Ohms. This 0.002 Ohm difference is negligible for circuit protection applications and does not affect functional performance.