5MFP 5 Equivalent & Substitute Parts

Part Overview

The 5MFP 5 is a 5A 125VAC 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 identification of active equivalent parts essential for ongoing system maintenance and component procurement. The substitute part 5MFP 5-R maintains identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

5MFP 5

Bel Fuse Inc.In Stock: 10375MFP 5 Datasheet

Current PartRFQ

5MFP 5-R

Bel Fuse Inc.In Stock: 16735MFP 5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 5MFP 5-R qualifies as a direct substitute based on matching all critical electrical and mechanical parameters: identical current rating (5A), voltage rating (125VAC), fuse type (cartridge glass), response time (fast blow), package dimensions (5mm x 20mm axial), breaking capacity (10kA), and operating temperature range (-55°C to 125°C). The substitution is valid because these parameters define the functional performance and physical compatibility requirements for this fuse category.

Parameter Comparison

Engineering Selection Recommendations

The 5MFP 5-R is the appropriate selection for new designs and component replacement applications. The obsolete status of the 5MFP 5 necessitates transition to the active equivalent. The 5MFP 5-R provides ROHS3 compliance, addressing modern regulatory requirements absent in the original part. Both parts maintain identical electrical performance and mechanical compatibility, ensuring direct substitution in existing circuit designs. The marginal difference in DC cold resistance (0.017 Ohms versus 0.016 Ohms) is negligible for fuse applications and does not affect functional performance.

Frequently Asked Questions (FAQ)

Q: Can the 5MFP 5-R replace the 5MFP 5 in existing applications? A: Yes. The 5MFP 5-R maintains identical current rating, voltage rating, fuse type, response time, package dimensions, breaking capacity, and operating temperature range. Direct substitution is valid for all circuit applications.

Q: What is the primary reason to transition from 5MFP 5 to 5MFP 5-R? A: The 5MFP 5 is classified as obsolete. The 5MFP 5-R is an active product with current manufacturing support and improved RoHS3 compliance certification.

Q: Are the physical dimensions identical between these parts? A: Yes. Both parts use the same 5mm x 20mm axial package with 0.217" diameter and 0.827" length, ensuring mechanical compatibility in through-hole mounting applications.

Q: Does the difference in DC cold resistance affect fuse performance? A: No. The difference between 0.017 Ohms and 0.016 Ohms is negligible for fuse operation and does not impact circuit performance or fuse response characteristics.

Q: What certifications does the 5MFP 5-R carry? A: The 5MFP 5-R holds CE, CSA, and PSE approvals, with ROHS3 compliance for regulatory alignment with current standards.