5MFP 1 Equivalent & Substitute Parts

Part Overview

The 5MFP 1 is a 1 A 250 V AC DC fast-blow glass cartridge fuse with a 5mm x 20mm axial package from Bel Fuse Inc. This part is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain circuit protection functionality in legacy systems and support ongoing maintenance requirements.

Substiute Parts

5MFP 1

Bel Fuse Inc.In Stock: 11925MFP 1 Datasheet

Current PartRFQ

5MFP 1-R

Bel Fuse Inc.In Stock: 13525MFP 1-R Datasheet

DirectRFQ

5SFP 1-R

Bel Fuse Inc.In Stock: 37145SFP 1-R Datasheet

Parametric EquivalentRFQ

0217001.MXEP

Littelfuse Inc.In Stock: 24490217001.MXEP Datasheet

SimilarRFQ

FSD-P-1A

OptiFuseIn Stock: 9485FSD-P-1A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MFP 1 is determined by the following critical parameters: current rating (1 A), voltage rating (250 V AC), response time (fast blow), package dimensions (5mm x 20mm axial), fuse type (cartridge glass), and mounting configuration (through hole). All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional compatibility within the original circuit design.

The substitute parts are grouped as follows:

Direct Manufacturer Equivalent: 5MFP 1-R from Bel Fuse Inc. maintains identical electrical characteristics and packaging with active product status.

Parametric Equivalents: 5SFP 1-R (Bel Fuse Inc.) and FSD-P-1A (OptiFuse) meet all critical electrical and mechanical parameters with active product status.

Similar Equivalent: 0217001.MXEP from Littelfuse Inc. meets electrical and mechanical requirements with minor dimensional tolerance variations and active product status.

Parameter Comparison

Engineering Selection Recommendations

5MFP 1-R (Bel Fuse Inc.): This direct manufacturer equivalent from Bel Fuse Inc. is the primary substitute. It maintains identical electrical specifications and packaging while offering active product status and ROHS3 compliance. This part is the preferred choice for direct replacement in legacy systems.

5SFP 1-R (Bel Fuse Inc.): This parametric equivalent meets all critical electrical and mechanical requirements with active product status and ROHS3 compliance. It offers expanded approval certifications including CCC, IMQ, SEMKO, and VDE, providing broader regulatory coverage.

0217001.MXEP (Littelfuse Inc.): This similar equivalent from Littelfuse Inc. meets electrical specifications with minor dimensional variations (5.80mm x 22.50mm versus 5mm x 20mm). It carries active product status, ROHS3 compliance, and comprehensive international certifications including BSI, CCC, KC, PSE, SEMKO, UR, and VDE. Physical fit verification is required due to dimensional differences.

FSD-P-1A (OptiFuse): This parametric equivalent meets all critical electrical and mechanical requirements with active product status and ROHS3 compliance. It carries cURus and IEC 60127 certifications and offers high inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 5MFP 1-R directly replace the obsolete 5MFP 1?

A: Yes. The 5MFP 1-R maintains identical electrical ratings (1 A, 250 V AC), response time (fast blow), package dimensions (5mm x 20mm axial), and mounting configuration (through hole). It is the direct manufacturer equivalent with active product status.

Q: What are the key differences between the 5MFP 1 and 5SFP 1-R?

A: Both parts share identical electrical ratings and package dimensions. The 5SFP 1-R differs in breaking capacity (35 A versus 200 A), melting I²t (1.6 versus 0.88), and DC cold resistance (0.09 versus 0.12 Ohms). The 5SFP 1-R carries broader international certifications.

Q: Is the 0217001.MXEP physically compatible with the 5MFP 1 footprint?

A: The 0217001.MXEP has slightly larger dimensions (5.80mm x 22.50mm versus 5mm x 20mm). Physical fit verification in the target application is required before implementation.

Q: Are all substitute parts RoHS compliant?

A: The 5MFP 1 is RoHS non-compliant. All substitute parts (5MFP 1-R, 5SFP 1-R, 0217001.MXEP, and FSD-P-1A) are ROHS3 compliant.

Q: Which substitute part has the highest inventory availability?

A: FSD-P-1A from OptiFuse has the highest inventory with 9,414 pieces in stock, followed by 5SFP 1-R with 3,642 pieces.

Q: Do all substitute parts support the same operating temperature range?

A: Yes. All substitute parts operate within the -55°C to 125°C temperature range, matching the original 5MFP 1 specification.