5SFP 5-R Equivalent & Substitute Parts

Part Overview

The 5SFP 5-R is a 5A 250VAC 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. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in circuit designs.

Substiute Parts

5SFP 5-R

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

Current PartRFQ

0034.1523.PT

SCHURTER Inc.In Stock: 13040034.1523.PT Datasheet

DirectRFQ

0217005.MXEP

LittelfuseIn Stock: 120690217005.MXEP Datasheet

DirectRFQ

BK/S500-V-5-R

Eaton - Electronics DivisionIn Stock: 883BK/S500-V-5-R 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

Substitute parts for the 5SFP 5-R are classified based on strict electrical and mechanical parameter matching:

Direct Substitutes (Fully Interchangeable): Parts meeting all critical parameters—5A current rating, 250V AC voltage rating, fast-blow response, 5mm x 20mm package, through-hole mounting, and 50A breaking capacity—are classified as direct substitutes. These parts maintain identical functional performance in circuit protection applications.

Similar Substitutes (Functionally Equivalent with Minor Variations): Parts matching core electrical ratings and package dimensions but with acceptable variations in secondary parameters (such as melting I²t, DC cold resistance, or dimensional tolerances within standard specifications) are classified as similar substitutes. These parts are suitable for equivalent circuit protection but may exhibit minor performance differences under specific fault conditions.

Parametric Equivalents (Conditional Substitutes): Parts matching primary electrical ratings and package form factor but with notable differences in breaking capacity or melting I²t are classified as parametric equivalents. These parts provide equivalent circuit protection for standard applications but may not be suitable for high-fault-current environments.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes: 0034.1523.PT (SCHURTER), 0217005.MXEP (Littelfuse), and BK/S500-V-5-R (Eaton) are suitable direct replacements for the 5SFP 5-R. All three maintain identical current and voltage ratings, fast-blow response, 5mm x 20mm package dimensions, and 50A breaking capacity. All direct substitutes carry ROHS3 compliance or equivalent RoHS certification, ensuring regulatory alignment with the original part.

Similar Substitute: BK/S500-V-5-RS (Eaton) matches all electrical and mechanical specifications of the 5SFP 5-R but carries RoHS non-compliant status. This part is functionally equivalent but should be selected only when RoHS compliance is not a design requirement.

Parametric Equivalent: FSD-P-5A (OptiFuse) provides equivalent circuit protection with matching current, voltage, and package specifications. However, its 35A breaking capacity is lower than the 5SFP 5-R (50A), and its melting I²t (58.83) is notably higher. This part is suitable for standard circuit protection applications but not recommended for high-fault-current environments where the full 50A breaking capacity is required.

Frequently Asked Questions (FAQ)

Q: Can I use 0217005.MXEP (Littelfuse) as a direct replacement for 5SFP 5-R?

A: Yes. The 0217005.MXEP matches all critical electrical parameters (5A, 250V AC, fast-blow) and mechanical specifications (5mm x 20mm through-hole package). Both parts carry ROHS3 compliance and identical breaking capacity (50A). Physical dimensions vary slightly (0.228" Dia vs. 0.217" Dia), but these tolerances are within standard specifications for cartridge fuses and do not affect interchangeability.

Q: What is the difference between BK/S500-V-5-R and BK/S500-V-5-RS?

A: Both parts are electrically and mechanically identical with matching 5A, 250V AC ratings and 50A breaking capacity. The primary difference is RoHS compliance status: BK/S500-V-5-R is RoHS compliant, while BK/S500-V-5-RS is RoHS non-compliant. Select based on your design's regulatory requirements.

Q: Is FSD-P-5A (OptiFuse) suitable for all applications using 5SFP 5-R?

A: FSD-P-5A provides equivalent circuit protection for standard applications with matching 5A and 250V AC ratings. However, its 35A breaking capacity is lower than the 5SFP 5-R (50A), and its higher melting I²t (58.83 vs. 41) indicates slower response to fault conditions. Use FSD-P-5A only in applications where the lower breaking capacity and slower response time are acceptable.

Q: Are all substitute parts available in the same packaging quantities?

A: Inventory levels vary by manufacturer and distributor. The 5SFP 5-R has 1608 pcs in stock, while 0217005.MXEP (Littelfuse) has the highest inventory at 12012 pcs. Verify current stock availability with your supplier before finalizing component selection.

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

A: No. The 5SFP 5-R, 0034.1523.PT, 0217005.MXEP, and FSD-P-5A all specify -55°C ~ 125°C operating temperature. BK/S500-V-5-R and BK/S500-V-5-RS do not specify operating temperature limits. Confirm temperature specifications with the manufacturer if your application requires operation outside standard industrial ranges.