5MFP 250 Equivalent & Substitute Parts

Part Overview

The 5MFP 250 is a 250 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm axial package manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without modification to existing installations.

Substiute Parts

5MFP 250

Bel Fuse Inc.In Stock: 11275MFP 250 Datasheet

Current PartRFQ

0217.250MXEP

Littelfuse Inc.In Stock: 27340217.250MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MFP 250 is determined by strict equivalence across the following critical parameters:

• Current Rating: 250 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 configuration (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The substitute part 0217.250MXEP manufactured by Littelfuse Inc. meets all critical electrical and mechanical parameters, confirming direct substitutability in applications currently using the 5MFP 250.

Parameter Comparison

Engineering Selection Recommendations

The 0217.250MXEP from Littelfuse Inc. is the direct electrical and mechanical equivalent for the obsolete 5MFP 250. Selection of this substitute is based on:

• Identical current, voltage, and response time ratings
• Matching package and mounting configuration
• Active product status ensuring continued availability
• Expanded regulatory approvals (CCC, K-MARK, SEMKO, VDE in addition to CE, CSA, UL)
• ROHS3 compliance, addressing modern environmental and regulatory requirements

For applications requiring RoHS non-compliant components, the original 5MFP 250 specification must be explicitly maintained; however, the 0217.250MXEP represents the current industry standard equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 0217.250MXEP be used as a direct replacement for the 5MFP 250 in existing circuits?

A: Yes. Both components share identical electrical ratings (250 mA, 250 V AC), fuse type (cartridge, glass), response time (fast blow), and mechanical package (5mm x 20mm axial, through-hole mounting). No circuit modifications are required.

Q: What are the differences between these two fuses?

A: The primary differences are product status (5MFP 250 is obsolete; 0217.250MXEP is active), RoHS compliance (5MFP 250 is non-compliant; 0217.250MXEP is ROHS3 compliant), and regulatory approvals (0217.250MXEP carries additional certifications including CCC, K-MARK, SEMKO, and VDE).

Q: Are there any physical dimension differences that could affect installation?

A: While both fuses are specified as 5mm x 20mm axial packages, the 0217.250MXEP has slightly larger nominal dimensions (0.236" Dia x 0.886" L versus 0.217" Dia x 0.827" L for the 5MFP 250). These variations remain within standard cartridge fuse tolerances and do not affect through-hole mounting compatibility.

Q: Which fuse should be selected for new designs?

A: The 0217.250MXEP should be selected for new designs due to active product status, ROHS3 compliance, and expanded regulatory approvals. The 5MFP 250 is obsolete and should not be specified for new applications.

Q: Are there any electrical performance differences between these fuses?

A: Both fuses meet the same electrical requirements for circuit protection at 250 mA and 250 V AC. Differences in breaking capacity (200A for 5MFP 250 versus 35A for 0217.250MXEP) and melting I²t values reflect different manufacturing standards but do not affect substitutability for standard circuit protection applications.