5MTP 1.2-R5 Equivalent & Substitute Parts

Part Overview

The 5MTP 1.2-R5 is a 1.25 A, 250 V AC/DC fuse cartridge manufactured by Bel Fuse Inc. in a 5mm x 20mm glass through-hole package with medium blow response characteristics. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and repair applications. Direct electrical and mechanical equivalents are available from active manufacturers to ensure continued availability and supply chain continuity.

Substiute Parts

5MTP 1.2-R5

Bel Fuse Inc.In Stock: 7605MTP 1.2-R5 Datasheet

Current PartRFQ

02341.25MXEP

LittelfuseIn Stock: 193102341.25MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MTP 1.2-R5 is determined by strict equivalence across the following critical parameters:

• Current Rating: 1.25 A (exact match required)
• Voltage Rating: 250 V AC (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: 100 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part 02341.25MXEP from Littelfuse meets all mandatory electrical and mechanical criteria for direct substitution. Physical dimensions show minor variations within acceptable tolerances for through-hole mounting applications.

Parameter Comparison

Engineering Selection Recommendations

The 02341.25MXEP from Littelfuse is a direct electrical and mechanical equivalent to the obsolete 5MTP 1.2-R5. Selection of this substitute is based on:

• Identical current and voltage ratings
• Matching fuse type, package dimensions, and response characteristics
• Equivalent breaking capacity and temperature operating range
• Full RoHS3 and REACH compliance alignment
• Active product status ensuring ongoing availability
• Comprehensive regulatory approvals (CE, CSA, K-MARK, PSE, UL)

The substitute part is suitable for direct replacement in existing circuit designs without modification to PCB layouts or holder specifications.

Frequently Asked Questions (FAQ)

Q: Can the 02341.25MXEP be used as a direct replacement for the 5MTP 1.2-R5?

A: Yes. Both parts share identical electrical ratings (1.25 A, 250 V AC), fuse type (cartridge, glass), response time (medium blow), and package dimensions (5mm x 20mm). Physical dimension tolerances are within acceptable ranges for through-hole mounting applications.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer identity and product status. The 5MTP 1.2-R5 is obsolete; the 02341.25MXEP is active. Minor variations exist in DC cold resistance (0.11 Ohms vs. 0.1262 Ohms) and melting I²t values (7.2 vs. 3.39), which do not affect substitution suitability for standard circuit protection applications. Physical dimensions show minor tolerance variations (5.50mm vs. 5.80mm diameter; 21.00mm vs. 22.50mm length).

Q: Are regulatory certifications equivalent between the two parts?

A: Both parts hold CE, CSA, and PSE certifications. The 02341.25MXEP additionally carries K-MARK and UL approvals, providing broader regulatory coverage. Both are ROHS3 compliant and REACH unaffected.

Q: Will the 02341.25MXEP fit existing fuse holders designed for the 5MTP 1.2-R5?

A: Yes. Both parts use the same 5mm x 20mm axial through-hole package format. Minor physical dimension variations fall within standard fuse holder tolerances.

Q: What is the inventory status of the substitute part?

A: The 02341.25MXEP is in active production with 1857 pieces available in new original stock, ensuring reliable supply chain availability compared to the obsolete 5MTP 1.2-R5.