Equivalent & Substitute Parts for 5MFP 125-R

Part Overview

The 5MFP 125-R is a 125 mA, 250 V AC/DC fast-blow glass cartridge fuse with a 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 designs.

Substiute Parts

5MFP 125-R

Bel Fuse Inc.In Stock: 10275MFP 125-R Datasheet

Current PartRFQ

0235.125HXEP

Littelfuse Inc.In Stock: 10740235.125HXEP Datasheet

DirectRFQ

0217.125MXEP

Littelfuse Inc.In Stock: 10610217.125MXEP Datasheet

SimilarRFQ

0235.125MXEP

Littelfuse Inc.In Stock: 8510235.125MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MFP 125-R is determined by strict equivalence across the following parameters:

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

All three substitute parts listed below meet these criteria and are manufactured by Littelfuse Inc., an active manufacturer with current product availability.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0235.125HXEP, 0217.125MXEP, and 0235.125MXEP) are functionally equivalent to the obsolete 5MFP 125-R based on electrical and mechanical parameters. Selection among these alternatives should be based on:

• Product Status: All three substitutes are active products with current manufacturing and availability.
• Regulatory Compliance: 0217.125MXEP offers the broadest certification coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE), making it suitable for applications requiring international market compliance. 0235.125HXEP and 0235.125MXEP provide CE, CSA, KC, and UL certifications.
• Inventory Availability: 0217.125MXEP (980 pcs), 0235.125HXEP (979 pcs), and 0235.125MXEP (742 pcs) are all in stock.

Frequently Asked Questions (FAQ)

Q: Can 0235.125HXEP, 0217.125MXEP, or 0235.125MXEP be used as direct replacements for 5MFP 125-R?

A: Yes. All three parts share identical electrical ratings (125 mA, 250 V AC), fuse type (cartridge, glass), response time (fast blow), and mechanical package (5mm x 20mm axial, through hole). They are functionally equivalent for circuit protection applications.

Q: What are the differences between the three substitute parts?

A: The primary differences are in regulatory certifications and internal electrical characteristics not affecting substitution eligibility. 0217.125MXEP includes additional certifications (CCC, K-MARK, SEMKO, VDE) compared to the other two options. All three maintain the same current rating, voltage rating, and package specifications.

Q: Are there any mechanical compatibility concerns when substituting these parts?

A: No. All substitute parts use the same 5mm x 20mm axial through-hole package as the original 5MFP 125-R, ensuring direct mechanical compatibility with existing PCB designs and fuse holders.

Q: Why is the original 5MFP 125-R listed as obsolete?

A: Bel Fuse Inc. has discontinued this product line. The Littelfuse equivalents (235 and 217 series) are active products with ongoing manufacturing support and availability.

Q: Which substitute should be selected for international applications?

A: 0217.125MXEP is recommended for applications requiring broad international compliance, as it carries certifications from CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE standards bodies.