5SFP 80-R Equivalent & Substitute Parts

Part Overview

The 5SFP 80-R is an 80 mA, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm axial form factor, 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 80-R

Bel Fuse Inc.In Stock: 8005SFP 80-R Datasheet

Current PartRFQ

BK/S500-V-80-R

Eaton - Electronics DivisionIn Stock: 779BK/S500-V-80-R Datasheet

DirectRFQ

0217.080MXEP

Littelfuse Inc.In Stock: 12020217.080MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5SFP 80-R are qualified based on the following mandatory electrical and mechanical parameters:

• Current Rating: 80 mA (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) form factor (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

The identified substitute parts meet all these criteria and are therefore electrically and mechanically interchangeable with the original 5SFP 80-R component.

Parameter Comparison

Engineering Selection Recommendations

Both BK/S500-V-80-R and 0217.080MXEP are active product alternatives to the obsolete 5SFP 80-R. Selection between these substitutes should be based on the following factors:

BK/S500-V-80-R (Eaton): This substitute maintains active product status and RoHS compliance. It provides direct electrical and mechanical compatibility with identical current, voltage, and breaking capacity ratings. Inventory availability is 740 units.

0217.080MXEP (Littelfuse): This substitute maintains active product status, ROHS3 compliance, and specifies the full operating temperature range (-55°C ~ 125°C) matching the original component. It carries comprehensive approval certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Inventory availability is 1094 units.

Both parts satisfy the mandatory electrical and mechanical substitution criteria. The choice between them depends on supply chain requirements, certification scope needed for the application, and temperature operating range specifications.

Frequently Asked Questions (FAQ)

Q: Can BK/S500-V-80-R and 0217.080MXEP be used interchangeably with 5SFP 80-R?

A: Yes. Both substitute parts match the mandatory electrical parameters (80 mA, 250 V AC, fast-blow response) and mechanical specifications (5mm x 20mm axial through-hole package). They are electrically and mechanically interchangeable.

Q: What are the key parameters that determine substitution eligibility?

A: Current rating (80 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), package dimensions (5mm x 20mm axial), mounting type (through hole), and breaking capacity (35 A) must all match exactly.

Q: Does the slight variation in physical dimensions between substitutes affect compatibility?

A: The substitute parts have minor dimensional variations (BK/S500-V-80-R: 0.218" Dia x 0.831" L; 0217.080MXEP: 0.236" Dia x 0.886" L) compared to the original (0.217" Dia x 0.827" L). These variations remain within the 5mm x 20mm axial package classification and do not affect through-hole mounting compatibility.

Q: What is the difference in melting I²t values between the parts?

A: The melting I²t values differ slightly (5SFP 80-R: 0.003; BK/S500-V-80-R: 0.0012; 0217.080MXEP: 0.00083). These variations reflect different internal fuse element designs but do not affect the 80 mA current rating or fast-blow response classification.

Q: Are there compliance or certification differences between the substitutes?

A: The original 5SFP 80-R carries CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE certifications. The 0217.080MXEP substitute maintains comparable certification coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE). The BK/S500-V-80-R does not specify approval agencies in the provided data.

Q: Which substitute should be selected for new designs?

A: Selection depends on application requirements. For applications requiring full operating temperature specification (-55°C ~ 125°C), the 0217.080MXEP is specified. For general replacement where temperature range is not critical, either substitute is acceptable based on supply availability and certification requirements.