Equivalent & Substitute Parts for 5MF 7 Glass Cartridge Fuse

Part Overview

The 5MF 7 is a 7A 125VAC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., designed for 5mm x 20mm holder applications. This part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and procurement planning. The 5MF 7-R serves as the direct parametric equivalent with identical electrical and mechanical specifications but maintains active product status.

Substiute Parts

5MF 7

Bel Fuse Inc.In Stock: 8915MF 7 Datasheet

Current PartRFQ

5MF 7-R

Bel Fuse Inc.In Stock: 46285MF 7-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 5MF 7-R qualifies as a direct parametric equivalent to the 5MF 7 based on the following critical substitution parameters:

• Current Rating: 7 A (identical)
• Voltage Rating (AC): 125 V (identical)
• Fuse Type: Cartridge, Glass (identical)
• Package / Case: 5mm x 20mm (identical)
• Response Time: Fast Blow (identical)
• Breaking Capacity @ Rated Voltage: 10kA (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)
• DC Cold Resistance: 0.011 Ohms (identical)
• Mounting Type: Requires Holder (identical)

Both parts are manufactured by Bel Fuse Inc. within the same 5MF series and maintain identical form factor and electrical performance characteristics. The substitution is valid for all applications requiring a 7A 125VAC fast-blow fuse in a 5mm x 20mm cartridge format.

Parameter Comparison

Engineering Selection Recommendations

The 5MF 7-R is the appropriate selection for new designs and replacement applications requiring a 7A 125VAC fast-blow glass cartridge fuse in 5mm x 20mm format. The 5MF 7-R maintains active product status with improved regulatory compliance, including ROHS3 certification and cULus approval, compared to the obsolete 5MF 7. Both parts share identical electrical performance and mechanical compatibility with standard 5mm x 20mm fuse holders. The marginal difference in melting I²t (88 versus 86) remains within acceptable tolerance for equivalent thermal performance in circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the 5MF 7-R directly replace the 5MF 7 in existing applications?

A: Yes. The 5MF 7-R is a direct parametric equivalent with identical current rating, voltage rating, fuse type, package dimensions, response time, and breaking capacity. Both parts are compatible with standard 5mm x 20mm fuse holders.

Q: What is the difference between the 5MF 7 and 5MF 7-R?

A: The primary differences are product status and regulatory compliance. The 5MF 7 is obsolete and RoHS non-compliant, while the 5MF 7-R is active and ROHS3 compliant. The melting I²t values differ slightly (86 versus 88), but this variance does not affect functional equivalence for circuit protection purposes.

Q: Are there any compatibility concerns when substituting the 5MF 7-R for the 5MF 7?

A: No compatibility concerns exist. Both parts require the same 5mm x 20mm holder and operate identically within the specified voltage and current parameters.

Q: What certifications does the 5MF 7-R carry?

A: The 5MF 7-R holds CE, CSA, cULus, and PSE approvals, providing comprehensive regulatory coverage for global applications.

Q: Is the 5MF 7-R suitable for new product designs?

A: Yes. The 5MF 7-R is the recommended choice for new designs due to its active product status and improved regulatory compliance profile.