5MFP 5-R Equivalent & Substitute Parts

Part Overview

The 5MFP 5-R is a 5A 125VAC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor applications. This component is actively produced and widely used in industrial and consumer electronics for circuit protection. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate multiple qualified suppliers.

Substiute Parts

5MFP 5-R

Bel Fuse Inc.In Stock: 16735MFP 5-R Datasheet

Current PartRFQ

0235005.MXEP

Littelfuse Inc.In Stock: 31290235005.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MFP 5-R is determined by the following critical parameters:

• Current Rating: Must be 5 A
• Voltage Rating (AC): Must be 125 V
• Fuse Type: Must be Cartridge, Glass
• Response Time: Must be Fast Blow
• Package / Case: Must be 5mm x 20mm (Axial)
• Mounting Type: Must be Through Hole
• Breaking Capacity @ Rated Voltage: Must be 10kA
• Operating Temperature Range: Must support -55°C ~ 125°C
• RoHS Compliance: Must be ROHS3 Compliant

The substitute part 0235005.MXEP (Littelfuse Inc.) meets all these criteria and qualifies as a direct equivalent for the 5MFP 5-R.

Parameter Comparison

Engineering Selection Recommendations

Both the 5MFP 5-R and 0235005.MXEP are active products with ROHS3 compliance and equivalent electrical and mechanical specifications. The 0235005.MXEP carries additional regulatory approvals (KC, UL) beyond the 5MFP 5-R, providing broader market acceptance. Selection between these parts should be based on availability, lead time, and specific regional certification requirements for the end application. Both parts are suitable for direct substitution in through-hole circuit protection applications requiring 5A 125VAC fast-blow protection.

Frequently Asked Questions (FAQ)

Q: Can the 0235005.MXEP replace the 5MFP 5-R in existing designs?

A: Yes. Both parts share identical electrical ratings (5A, 125VAC), fuse type (cartridge, glass), response time (fast blow), package dimensions (5mm x 20mm), and breaking capacity (10kA). They are mechanically and electrically interchangeable for through-hole mounting applications.

Q: What is the significance of the different DC Cold Resistance values?

A: The DC Cold Resistance values (0.016 Ohms for 5MFP 5-R and 0.0184 Ohms for 0235005.MXEP) are within acceptable tolerance for fuse cartridges and do not affect substitution eligibility. Both values are typical for this fuse category.

Q: Are there differences in melting I²t between these parts?

A: The melting I²t values differ (38 for 5MFP 5-R and 27.41 for 0235005.MXEP). Both parts maintain the same fast-blow response classification and 5A current rating. The difference reflects manufacturing variations within the fast-blow fuse specification and does not preclude substitution.

Q: Do both parts meet the same regulatory standards?

A: Both parts are ROHS3 compliant and REACH unaffected. The 0235005.MXEP carries additional certifications (KC, UL) compared to the 5MFP 5-R (CE, CSA, PSE). Applications requiring UL certification should specify the 0235005.MXEP.

Q: Are the physical dimensions identical?

A: Both parts are specified for 5mm x 20mm (Axial) package. Measured dimensions show minor variations (5MFP 5-R: 5.50mm x 21.00mm; 0235005.MXEP: 5.80mm x 22.50mm), which remain within standard tolerance for through-hole mounting in fuse holders designed for this form factor.