5SFP 8 Equivalent & Substitute Parts

Part Overview

The 5SFP 8 is an 8 A, 250 V AC/DC fast-blow glass cartridge fuse with a 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. The fuse is designed for general-purpose circuit protection applications requiring fast response characteristics and compact form factor.

Substiute Parts

5SFP 8

Bel Fuse Inc.In Stock: 8615SFP 8 Datasheet

Current PartRFQ

5SFP 8-R

Bel Fuse Inc.In Stock: 28835SFP 8-R Datasheet

DirectRFQ

0217008.MXEP

Littelfuse Inc.In Stock: 20880217008.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5SFP 8 is determined by strict equivalence across the following critical parameters:

• Current Rating: 8 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)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 80 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

Physical package dimensions (5mm x 20mm nominal) and mechanical compatibility with standard fuse holders are required. Substitute parts identified below meet all electrical and mechanical criteria for direct replacement.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts meet the electrical and mechanical requirements for direct replacement of the 5SFP 8.

5SFP 8-R (Bel Fuse Inc.): This part maintains manufacturer continuity with the original 5SFP 8 while offering active product status. It provides ROHS3 compliance and expanded certification coverage (cULus). DC cold resistance is marginally lower at 0.007 Ohms compared to the original 0.008 Ohms, remaining within acceptable tolerance for this component class. This option is suitable for applications requiring minimal design validation.

0217008.MXEP (Littelfuse Inc.): This cross-manufacturer substitute provides the broadest international certification coverage, including BSI, CCC, KC, PSE, SEMKO, UR, and VDE in addition to CE and CSA. ROHS3 compliance is confirmed. DC cold resistance is 0.0068 Ohms. Physical dimensions show minor variation (0.228" Dia x 0.886" L versus 0.217" Dia x 0.827" L), remaining within standard fuse holder tolerances. This option is suitable for applications requiring expanded global regulatory compliance.

Both parts are available in active inventory with bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can the 5SFP 8-R be used as a direct replacement for the 5SFP 8?

A: Yes. The 5SFP 8-R meets all electrical specifications (8 A, 250 V AC, fast-blow response, 80 A breaking capacity) and mechanical requirements (5mm x 20mm through-hole package). Both are manufactured by Bel Fuse Inc. and share identical series designation.

Q: What is the difference between the 5SFP 8-R and 0217008.MXEP?

A: Both parts are electrically equivalent with identical current, voltage, and response characteristics. The primary differences are manufacturer (Bel Fuse Inc. versus Littelfuse Inc.), certification scope (0217008.MXEP includes additional international approvals), and minor physical dimensions. DC cold resistance values are comparable (0.007 Ohms versus 0.0068 Ohms).

Q: Are there physical compatibility concerns with the 0217008.MXEP?

A: The 0217008.MXEP has slightly larger dimensions (5.80mm x 22.50mm) compared to the nominal 5mm x 20mm specification. These variations remain within standard fuse holder mechanical tolerances and do not affect electrical performance or safety.

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

A: Selection depends on regulatory requirements. For applications requiring standard CE, CSA, and UL certifications, either part is suitable. For applications requiring expanded international compliance (CCC, KC, PSE, SEMKO, UR, VDE), the 0217008.MXEP is the appropriate choice.

Q: Is RoHS compliance a factor in substitution?

A: The original 5SFP 8 is RoHS non-compliant. Both substitute parts (5SFP 8-R and 0217008.MXEP) are ROHS3 compliant. For applications subject to RoHS directives, either substitute part satisfies compliance requirements.

Q: Can the 5SFP 8 be repaired or refurbished?

A: Fuses are consumable components designed for single-use operation. Replacement with an equivalent part is the standard practice.