Equivalent & Substitute Parts for 5MFP 500

Part Overview

The 5MFP 500 is a 500 mA, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement planning. Active alternatives with identical or compatible electrical and mechanical specifications are available from both the original manufacturer and qualified cross-reference suppliers.

Substiute Parts

5MFP 500

Bel Fuse Inc.In Stock: 9905MFP 500 Datasheet

Current PartRFQ

5MFP 500-R

Bel Fuse Inc.In Stock: 11405MFP 500-R Datasheet

DirectRFQ

5SFP 500-R

Bel Fuse Inc.In Stock: 21445SFP 500-R Datasheet

Parametric EquivalentRFQ

0217.050MXEP

Littelfuse Inc.In Stock: 27390217.050MXEP Datasheet

SimilarRFQ

0217.500MXEP

Littelfuse Inc.In Stock: 11770217.500MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: current rating (500 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), and physical package dimensions (5mm x 20mm axial). Parts are grouped into two categories:

Direct Manufacturer Equivalents: Parts from Bel Fuse Inc. that maintain identical electrical ratings and form factor. These include 5MFP 500-R (active status, improved RoHS compliance) and 5SFP 500-R (active status, alternative series designation).

Cross-Manufacturer Equivalents: Parts from Littelfuse Inc. (Series 217) that match all critical electrical and mechanical parameters. The 0217.500MXEP maintains identical current and voltage ratings with compatible package dimensions.

Non-Equivalent Reference: The 0217.050MXEP is listed for reference only and is not a substitute due to its 50 mA current rating, which differs fundamentally from the 500 mA requirement.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 5MFP 500, the 5MFP 500-R is the primary recommendation. This part maintains identical electrical specifications and form factor while offering active product status and ROHS3 compliance. Approval certifications include CE, CSA, and cULus.

The 5SFP 500-R provides an alternative from Bel Fuse Inc. with expanded regulatory approvals (CCC, CE, CSA, cULus, IMQ, SEMKO, VDE) and active status. This part is suitable for applications requiring broader international compliance coverage.

The 0217.500MXEP from Littelfuse Inc. (Series 217) is a qualified cross-manufacturer equivalent with identical electrical ratings and compatible physical dimensions. This part carries the broadest approval agency coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE) and is suitable for applications where multi-source procurement is required.

All three substitute parts are RoHS3 compliant and support the full operating temperature range of -55°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the 5MFP 500-R be used as a direct replacement for the obsolete 5MFP 500?

A: Yes. The 5MFP 500-R maintains identical current rating (500 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), and package dimensions (5mm x 20mm axial). The primary differences are product status (active vs. obsolete) and improved RoHS compliance.

Q: What is the difference between the 5MFP 500-R and 5SFP 500-R?

A: Both parts share identical electrical specifications and form factor. The 5SFP 500-R is designated from a different series and carries expanded regulatory approvals including CCC, IMQ, and SEMKO certifications. Selection between these parts depends on specific regulatory requirements for the target application.

Q: Is the 0217.500MXEP from Littelfuse Inc. compatible with the 5MFP 500?

A: Yes. The 0217.500MXEP matches all critical electrical parameters (500 mA, 250 V AC, fast-blow response) and physical package dimensions (5mm x 20mm axial). This part is suitable for applications where cross-manufacturer sourcing is acceptable and provides the broadest international approval coverage.

Q: Why is the 0217.050MXEP listed but not recommended as a substitute?

A: The 0217.050MXEP has a current rating of 50 mA, which is fundamentally incompatible with the 500 mA requirement of the 5MFP 500. Current rating is a critical selection parameter and cannot be substituted.

Q: What are the key differences in breaking capacity between substitute parts?

A: The 5MFP 500 and 5MFP 500-R both specify 200A breaking capacity at rated voltage. The 5SFP 500-R and 0217.500MXEP specify 35A breaking capacity. Application requirements for fault current handling should be evaluated when selecting between these options.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 5MFP 500-R, 5SFP 500-R, and 0217.500MXEP are all ROHS3 compliant. The original 5MFP 500 is RoHS non-compliant, making the transition to compliant alternatives necessary for new designs and ongoing procurement.