5MFP 80-R Equivalent & Substitute Parts

Part Overview

The 5MFP 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, necessitating identification of active equivalent parts for ongoing procurement and system maintenance. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without redesign.

Substiute Parts

5MFP 80-R

Bel Fuse Inc.In Stock: 8755MFP 80-R Datasheet

Current PartRFQ

0217.080MXEP

Littelfuse Inc.In Stock: 12020217.080MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MFP 80-R is based on the following critical parameters:

• Current Rating: 80 mA (exact match required)
• Voltage Rating: 250 V AC (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)
• Operating Temperature: -55°C ~ 125°C (minimum range required)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The substitute part 0217.080MXEP (Littelfuse Inc., Series 217) meets all mandatory electrical and mechanical parameters. Physical dimensions show minor variation (0.236" Dia x 0.886" L vs. 0.217" Dia x 0.827" L), which remains within acceptable tolerance for through-hole cartridge fuse applications. The substitute maintains active product status and full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The 0217.080MXEP is a direct functional equivalent for the 5MFP 80-R. Selection is based on:

• Electrical Equivalence: Identical current rating (80 mA), voltage rating (250 V AC), and response time (fast blow) ensure equivalent circuit protection performance.
• Mechanical Compatibility: Both components use the 5mm x 20mm axial cartridge form factor with through-hole mounting, compatible with existing fuse holders and PCB layouts.
• Product Status: The substitute maintains active product status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both parts are ROHS3 compliant. The substitute carries expanded approval certifications (UL, VDE, CCC, K-MARK, SEMKO) in addition to the original part's certifications (CE, CSA, cULus).
• Temperature Range: Operating temperature range (-55°C ~ 125°C) is identical, supporting equivalent thermal performance across all specified conditions.

Frequently Asked Questions (FAQ)

Q: Can the 0217.080MXEP replace the 5MFP 80-R in existing designs?

A: Yes. Both parts share identical electrical ratings (80 mA, 250 V AC), fuse type (cartridge, glass), response time (fast blow), and mechanical form factor (5mm x 20mm axial, through-hole). No circuit redesign is required.

Q: What is the significance of the physical dimension differences between the two parts?

A: The 0217.080MXEP has slightly larger dimensions (0.236" Dia x 0.886" L) compared to the 5MFP 80-R (0.217" Dia x 0.827" L). These variations are within acceptable tolerance for cartridge fuse applications and do not affect compatibility with standard 5mm x 20mm fuse holders.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The 0217.080MXEP carries additional approval certifications (UL, VDE, CCC, K-MARK, SEMKO) beyond the original part's certifications (CE, CSA, cULus), providing broader regulatory coverage.

Q: Why is the 5MFP 80-R classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Bel Fuse Inc. The 0217.080MXEP, maintained as an active product by Littelfuse Inc., provides equivalent functionality with assured long-term availability.

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 form factor (5mm x 20mm axial), and mounting type (through-hole) must remain identical. Operating temperature range and RoHS compliance must meet or exceed the original specification.