Equivalent & Substitute Parts for 5SFP 5 Glass Cartridge Fuse

Part Overview

The 5SFP 5 is a 5A 250VAC glass cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor applications. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance requirements. Equivalent and substitute parts must maintain identical electrical ratings, mechanical dimensions, and thermal characteristics to ensure direct interchangeability in circuit protection applications.

Substiute Parts

5SFP 5

Bel Fuse Inc.In Stock: 9035SFP 5 Datasheet

Current PartRFQ

5SFP 5-R

Bel Fuse Inc.In Stock: 16705SFP 5-R Datasheet

DirectRFQ

0034.1523.PT

SCHURTER Inc.In Stock: 13040034.1523.PT Datasheet

DirectRFQ

0217005.MXEP

LittelfuseIn Stock: 120690217005.MXEP Datasheet

DirectRFQ

BK/S500-V-5-RS

Eaton - Electronics DivisionIn Stock: 966BK/S500-V-5-RS Datasheet

SimilarRFQ

FSD-P-5A

OptiFuseIn Stock: 1209FSD-P-5A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: current rating (5A), voltage rating (250VAC), fuse type (cartridge glass), response time (fast blow), and physical package dimensions (5mm x 20mm). All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional interchangeability in the original application circuit.

The substitute parts are categorized as follows:

Direct Manufacturer Equivalents maintain identical specifications with active product status and improved compliance certifications. These parts are sourced from the original manufacturer (Bel Fuse Inc.) or alternative qualified manufacturers with equivalent electrical performance.

Parametric Equivalents meet all critical electrical and mechanical requirements but may exhibit minor variations in secondary parameters such as melting I²t, DC cold resistance, or dimensional tolerances within acceptable engineering limits.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 5SFP 5-R (Bel Fuse Inc.)

The 5SFP 5-R is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications and mechanical form factor while offering ROHS3 compliance and expanded approval certifications (CCC, cULus added). This part provides the highest assurance of form-fit-function compatibility with the obsolete 5SFP 5.

Secondary Recommendations: 0217005.MXEP (Littelfuse) and 0034.1523.PT (SCHURTER Inc.)

Both parts meet all critical electrical and mechanical parameters with active product status and ROHS3 compliance. The 0217005.MXEP offers the broadest approval agency coverage (BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, VDE) and highest inventory availability (12,012 units). The 0034.1523.PT provides cURus certification with established supply chain presence.

Alternative Option: BK/S500-V-5-RS (Eaton - Electronics Division)

This part maintains electrical equivalence and active status but does not meet ROHS3 compliance requirements. Selection is appropriate only for applications where RoHS compliance is not mandated.

Parametric Equivalent: FSD-P-5A (OptiFuse)

This part meets all critical electrical and mechanical specifications but exhibits a lower breaking capacity (35A versus 50A) and higher melting I²t (58.83 versus 41). Selection requires verification that the application circuit can tolerate these secondary parameter variations.

Frequently Asked Questions (FAQ)

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

A: Yes. The 5SFP 5-R maintains identical current rating (5A), voltage rating (250VAC), response time (fast blow), and physical dimensions (5mm x 20mm). It is the direct active equivalent from the original manufacturer.

Q: What is the significance of the melting I²t parameter in substitute selection?

A: Melting I²t defines the thermal energy required to melt the fuse element. Substitute parts with melting I²t values within the range of 33.8 to 58.83 are functionally equivalent for this 5A 250VAC application. Variations within this range do not affect circuit protection performance for standard load conditions.

Q: Are all substitute parts mechanically interchangeable?

A: All listed substitute parts conform to the 5mm x 20mm axial package standard. Minor dimensional variations (0.213" to 0.228" diameter, 0.827" to 0.886" length) fall within standard cartridge fuse tolerances and do not prevent mechanical installation in standard fuse holders.

Q: Which substitute part offers the best compliance certifications?

A: The 0217005.MXEP (Littelfuse) provides the most comprehensive approval agency coverage, including BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE certifications. This part is suitable for applications requiring multi-regional compliance documentation.

Q: Is RoHS3 compliance required for all substitute selections?

A: RoHS3 compliance is required only if the application or end-market mandates it. The 5SFP 5-R, 0034.1523.PT, 0217005.MXEP, and FSD-P-5A all meet ROHS3 requirements. The BK/S500-V-5-RS does not and should be selected only when RoHS compliance is not a requirement.

Q: What is the difference between "Direct Manufacturer" and "Parametric Equivalent" classifications?

A: Direct manufacturer equivalents (5SFP 5-R, 0034.1523.PT, 0217005.MXEP, BK/S500-V-5-RS) maintain all specified electrical and mechanical parameters within standard tolerances. The parametric equivalent (FSD-P-5A) meets critical electrical and mechanical requirements but exhibits variations in secondary parameters such as breaking capacity and melting I²t that may affect performance in specific circuit conditions.