Bel Fuse Inc. 5SFP 2-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Bel Fuse Inc. 5SFP 2-R is a 2A 250VAC glass cartridge fuse with fast-blow response characteristics, designed for through-hole mounting in 5mm x 20mm form factor applications. This component is classified as Active product status and carries multiple international approvals including CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE certifications. Equivalent and substitute parts become necessary when managing supply chain continuity, addressing inventory constraints, or accommodating design revisions that permit alternative manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

5SFP 2-R

Bel Fuse Inc.In Stock: 20765SFP 2-R Datasheet

Current PartRFQ

5MFP 2-R

Bel Fuse Inc.In Stock: 27435MFP 2-R Datasheet

Parametric EquivalentRFQ

0034.1519.PT

SCHURTER Inc.In Stock: 41640034.1519.PT Datasheet

DirectRFQ

0217002.MXEP

Littelfuse Inc.In Stock: 22060217002.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5SFP 2-R is determined by strict alignment with the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Current Rating: 2 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

All three substitute parts meet these criteria. Secondary parameters including Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agency certifications may vary within acceptable engineering tolerances for the application category.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are classified as Active product status and maintain ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original 5SFP 2-R component.

5MFP 2-R (Bel Fuse Inc.): This parametric equivalent from the same manufacturer offers the highest Breaking Capacity at 200A, compared to 35A for the primary part. The lower Melting I²t value (4.4 versus 6.4) indicates faster thermal response. Approval agencies include CE, CSA, cULus, and PSE. This part is suitable for applications where enhanced breaking capacity is beneficial and the reduced thermal mass is acceptable.

0034.1519.PT (SCHURTER Inc.): This direct manufacturer substitute maintains identical Breaking Capacity (35A) and closely matched Melting I²t (5.28 versus 6.4). Physical dimensions show minor variation (5.40mm diameter x 22.50mm length versus 5.50mm x 21.00mm), which may require verification for tight mechanical tolerances. Approval agency is cURus. This part provides the closest electrical performance match to the original specification.

0217002.MXEP (Littelfuse Inc.): This direct manufacturer substitute offers the broadest approval agency coverage, including BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. Breaking Capacity and Melting I²t (5.73) are comparable to the primary part. Physical dimensions show variation (5.80mm diameter x 22.50mm length). DC Cold Resistance is 0.0416 Ohms. This part is suitable for applications requiring maximum international certification coverage.

Frequently Asked Questions (FAQ)

Q: Can the 5MFP 2-R be used as a direct replacement for the 5SFP 2-R?

A: Yes. Both parts share identical electrical parameters: 2A current rating, 250V AC voltage rating, fast-blow response, and 5mm x 20mm package. The 5MFP 2-R features higher Breaking Capacity (200A versus 35A) and lower Melting I²t (4.4 versus 6.4), which represents faster thermal response. These differences are within acceptable substitution parameters for the cartridge fuse category.

Q: What are the physical dimension differences among the substitute parts?

A: The 5SFP 2-R and 5MFP 2-R (both Bel Fuse) are specified as 0.217" diameter x 0.827" length (5.50mm x 21.00mm). The SCHURTER 0034.1519.PT measures 0.213" diameter x 0.886" length (5.40mm x 22.50mm). The Littelfuse 0217002.MXEP measures 0.228" diameter x 0.886" length (5.80mm x 22.50mm). These variations require mechanical tolerance verification for applications with constrained mounting spaces.

Q: Which substitute part has the most comprehensive international approvals?

A: The Littelfuse 0217002.MXEP carries the broadest approval agency coverage: BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. The original 5SFP 2-R includes CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE. The SCHURTER 0034.1519.PT is approved by cURus only. Selection should align with specific regional compliance requirements for the end application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts—5MFP 2-R, 0034.1519.PT, and 0217002.MXEP—are ROHS3 compliant, matching the original 5SFP 2-R specification.

Q: What is the significance of Melting I²t variation among these parts?

A: Melting I²t is a thermal energy parameter that indicates the fuse element's response speed. The 5SFP 2-R has Melting I²t of 6.4, while substitutes range from 4.4 (5MFP 2-R) to 5.73 (0217002.MXEP). Lower values indicate faster thermal response. All values remain within the fast-blow category. Application-specific circuit protection requirements should determine acceptable variation.

Q: Can DC Cold Resistance differences affect circuit performance?

A: DC Cold Resistance values are provided for the 5SFP 2-R (0.036 Ohms), 5MFP 2-R (0.051 Ohms), and 0217002.MXEP (0.0416 Ohms). These resistances are negligible in most circuit applications but may be relevant in low-voltage, high-current designs. The SCHURTER 0034.1519.PT does not specify this parameter. Verification against circuit design requirements is recommended for sensitive applications.