5MFP 1.5 Equivalent & Substitute Parts

Part Overview

The 5MFP 1.5 is a 1.5 A, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, indicating discontinuation from active production. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and legacy system requirements where this fuse specification remains functionally required.

Substiute Parts

5MFP 1.5

Bel Fuse Inc.In Stock: 10965MFP 1.5 Datasheet

Current PartRFQ

5MFP 1.5-R

Bel Fuse Inc.In Stock: 17705MFP 1.5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MFP 1.5 is determined by strict equivalence across the following critical parameters:

• Current Rating: 1.5 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Physical Package: 5mm x 20mm axial form factor (exact match required)
• Mounting Configuration: Through Hole (exact match required)

The substitute part 5MFP 1.5-R meets all these criteria and is manufactured by the same supplier, Bel Fuse Inc., within the same product series. Substitution is valid where these parameters align precisely.

Parameter Comparison

Engineering Selection Recommendations

The 5MFP 1.5-R is the direct substitute for the obsolete 5MFP 1.5. Both parts share identical electrical and mechanical specifications across all critical parameters. The 5MFP 1.5-R is currently in active production status with higher inventory availability (1680 Pcs vs. 1034 Pcs).

The 5MFP 1.5-R provides improved compliance posture: it is ROHS3 compliant, whereas the original 5MFP 1.5 is RoHS non-compliant. Both parts maintain equivalent regulatory certifications (CE, CSA, PSE) with the substitute offering expanded UL certification (cULus). The melting I²t values (2.58 vs. 2.6) and DC cold resistance (0.07 vs. 0.068 Ohms) are functionally equivalent within engineering tolerance.

Selection of the 5MFP 1.5-R is appropriate for all applications previously served by the 5MFP 1.5, with the added benefit of active production status and improved environmental compliance.

Frequently Asked Questions (FAQ)

Q: Can the 5MFP 1.5-R be used as a direct replacement for the 5MFP 1.5?

A: Yes. Both parts are identical in current rating (1.5 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), physical dimensions (5mm x 20mm), and mounting configuration (through hole). All critical electrical and mechanical parameters match.

Q: What is the difference between the 5MFP 1.5 and 5MFP 1.5-R?

A: The primary differences are product status and compliance. The 5MFP 1.5 is obsolete and RoHS non-compliant. The 5MFP 1.5-R is in active production and ROHS3 compliant. Minor variations exist in melting I²t (2.58 vs. 2.6) and DC cold resistance (0.07 vs. 0.068 Ohms), which are functionally equivalent.

Q: Are there any packaging differences between these parts?

A: The 5MFP 1.5 is packaged in standard form, while the 5MFP 1.5-R is supplied in bulk packaging. Both maintain the same 5mm x 20mm axial cartridge form factor and through-hole mounting configuration.

Q: What certifications apply to the 5MFP 1.5-R?

A: The 5MFP 1.5-R holds CE, CSA, cULus, and PSE approvals. The original 5MFP 1.5 holds CE, CSA, PSE, and UL approvals. Both meet the same regulatory framework for this fuse category.

Q: Is the 5MFP 1.5-R suitable for applications requiring RoHS compliance?

A: Yes. The 5MFP 1.5-R is ROHS3 compliant, making it suitable for applications with RoHS requirements. The original 5MFP 1.5 is RoHS non-compliant.