5MFP 7 Equivalent & Substitute Parts

Part Overview

The 5MFP 7 is a 7A 125VAC fast-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system maintenance and component sourcing. The part features a 10kA breaking capacity and operates across a temperature range of -55°C to 125°C, with approval from CE, CSA, PSE, and UL agencies. Due to its obsolete status, the 5MFP 7-R represents the active equivalent from the same manufacturer series.

Substiute Parts

5MFP 7

Bel Fuse Inc.In Stock: 7765MFP 7 Datasheet

Current PartRFQ

5MFP 7-R

Bel Fuse Inc.In Stock: 19195MFP 7-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MFP 7 is determined by strict equivalence across the following critical parameters:

• Current Rating: 7 A (exact match required)
• Voltage Rating: 125 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)
• Breaking Capacity: 10kA minimum (exact match required)
• Mounting Configuration: Through Hole (exact match required)

The 5MFP 7-R meets all substitution criteria as a direct equivalent from the same manufacturer series. Both parts share identical electrical ratings, mechanical dimensions, and functional characteristics. The primary distinction lies in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 5MFP 7-R is the direct active equivalent for the obsolete 5MFP 7. Selection between these parts is determined by compliance and availability requirements:

5MFP 7-R (Recommended for New Designs and Replacements): This part is active in production with improved RoHS3 compliance status. It maintains all critical electrical and mechanical specifications identical to the original 5MFP 7. The marginal differences in DC cold resistance (0.01 Ohms vs. 0.011 Ohms) and melting I²t (88 vs. 86) remain within acceptable operational tolerances for fast-blow cartridge fuse applications. Availability is significantly higher with 1901 units in stock compared to 675 units of the obsolete variant.

5MFP 7 (Legacy Systems Only): Retain this part only for direct replacement in existing systems where component-level compatibility is mandated. The obsolete status and RoHS non-compliance restrict its use to maintenance scenarios where original specifications are required.

Frequently Asked Questions (FAQ)

Q: Can the 5MFP 7-R directly replace the 5MFP 7 in existing circuits?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters: 7A current rating, 125V AC voltage rating, 10kA breaking capacity, fast-blow response, and 5mm x 20mm axial package. The 5MFP 7-R is the active production equivalent.

Q: What is the significance of the RoHS compliance difference?

A: The 5MFP 7 is RoHS non-compliant, while the 5MFP 7-R is ROHS3 compliant. For new designs and systems subject to RoHS regulations, the 5MFP 7-R is the appropriate selection. For legacy system maintenance where original specifications are required, the 5MFP 7 remains functionally equivalent.

Q: Are there differences in approval certifications between these parts?

A: The 5MFP 7 carries CE, CSA, PSE, and UL approvals. The 5MFP 7-R carries CE, CSA, and PSE approvals. Both meet standard industrial safety requirements. Verify specific certification requirements for your application.

Q: What do the differences in DC cold resistance and melting I²t indicate?

A: The 5MFP 7-R exhibits slightly lower DC cold resistance (0.01 Ohms vs. 0.011 Ohms) and marginally higher melting I²t (88 vs. 86). These minor variations are inherent to manufacturing tolerances and do not affect functional equivalence in fast-blow fuse applications.

Q: Why is the 5MFP 7 classified as obsolete?

A: The 5MFP 7 has been superseded by the 5MFP 7-R in the manufacturer's active product line. The 5MFP 7-R provides improved compliance status and remains in active production with higher availability.

Q: Can I use these fuses in both AC and DC circuits?

A: Both parts are rated for 125V AC. Verify DC voltage compatibility requirements for your specific application, as fuse performance characteristics may differ between AC and DC operation.