5SFP 4 Equivalent & Substitute Parts

Part Overview

The 5SFP 4 is a 4 A 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm (axial) through-hole package, manufactured by Bel Fuse Inc. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and functional characteristics to ensure direct compatibility in existing circuit designs.

Substiute Parts

5SFP 4

Bel Fuse Inc.In Stock: 10465SFP 4 Datasheet

Current PartRFQ

5SFP 4-R

Bel Fuse Inc.In Stock: 19215SFP 4-R Datasheet

DirectRFQ

0034.1522.PT

SCHURTER Inc.In Stock: 26960034.1522.PT Datasheet

DirectRFQ

0217004.MXEP

Littelfuse Inc.In Stock: 8580217004.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5SFP 4 is determined by strict equivalence across the following parameters:

• Current Rating: Must be 4 A
• Voltage Rating (AC): Must be 250 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 40 A
• Operating Temperature Range: Must be -55°C ~ 125°C

All identified substitute parts meet these criteria. Variations in secondary parameters such as DC cold resistance, melting I²t values within acceptable ranges, and dimensional tolerances do not affect functional substitutability.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the 5SFP 4 and meet the core electrical and mechanical requirements for direct substitution.

5SFP 4-R (Bel Fuse Inc.) is the primary substitute, offering continuity with the original manufacturer while providing active product status and ROHS3 compliance. This part carries expanded certification coverage including CCC and cULus approvals.

0034.1522.PT (SCHURTER Inc.) is a cross-manufacturer equivalent with active status and ROHS3 compliance. Certification is limited to cURus, which may require evaluation against specific application requirements.

0217004.MXEP (Littelfuse Inc.) is a cross-manufacturer equivalent with active status, ROHS3 compliance, and the broadest certification portfolio including BSI, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. This part is suitable for applications requiring comprehensive international approvals.

For new designs or systems requiring RoHS compliance, any of the three active substitutes is appropriate. For legacy systems currently using the obsolete 5SFP 4, the 5SFP 4-R provides the most direct replacement path.

Frequently Asked Questions (FAQ)

Q: Can the 5SFP 4-R be used as a direct replacement for the 5SFP 4?

A: Yes. Both parts share identical electrical ratings (4 A, 250 V AC/DC), fuse type (cartridge, glass), response time (fast blow), package dimensions (5mm x 20mm axial), and operating temperature range (-55°C ~ 125°C). The primary difference is product status: the original is obsolete while the 5SFP 4-R is active.

Q: What are the key differences between the three substitute parts?

A: All three substitutes meet the core electrical and mechanical specifications. Differences exist in manufacturer, certification agencies, and RoHS compliance status. The 5SFP 4-R maintains the original manufacturer (Bel Fuse Inc.), while 0034.1522.PT and 0217004.MXEP are cross-manufacturer alternatives from SCHURTER and Littelfuse respectively.

Q: Are there dimensional variations between substitute parts?

A: Minor dimensional tolerances exist within the 5mm x 20mm package specification. The 5SFP 4 and 5SFP 4-R are specified as 0.217" Dia x 0.827" L (5.50mm x 21.00mm). The 0034.1522.PT is specified as 0.213" Dia x 0.886" L (5.40mm x 22.50mm), and the 0217004.MXEP is specified as 0.228" Dia x 0.886" L (5.80mm x 22.50mm). These variations remain within standard 5x20mm cartridge fuse tolerances and do not affect mechanical fit in standard through-hole fuse holders.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring RoHS compliance, any of the three active substitutes is appropriate. The 0217004.MXEP offers the broadest international certification coverage. The 5SFP 4-R provides continuity with the original manufacturer. Selection should be based on specific application certifications, supply chain availability, and cost considerations.

Q: Are all substitute parts RoHS compliant?

A: The 5SFP 4-R, 0034.1522.PT, and 0217004.MXEP are all ROHS3 compliant. The original 5SFP 4 is RoHS non-compliant, which is one reason substitution may be necessary for new or updated system designs.