5MFP 1-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 5MFP 1-R is a 1 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm through-hole package. This component is Active status and widely used in power distribution, circuit protection, and industrial control applications. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and regulatory approvals to ensure direct interchangeability in circuit designs.

Substiute Parts

5MFP 1-R

Bel Fuse Inc.In Stock: 13525MFP 1-R Datasheet

Current PartRFQ

5SFP 1-R

Bel Fuse Inc.In Stock: 37145SFP 1-R Datasheet

Parametric EquivalentRFQ

0235001.HXEP

Littelfuse Inc.In Stock: 8690235001.HXEP Datasheet

DirectRFQ

0217001.MXEP

Littelfuse Inc.In Stock: 24490217001.MXEP Datasheet

SimilarRFQ

FSD-P-1A

OptiFuseIn Stock: 9485FSD-P-1A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5MFP 1-R is determined by the following critical parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)
• Package Dimensions: 5mm x 20mm nominal (minor dimensional variations acceptable within mechanical tolerance)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

Substitute parts are classified into three categories: Parametric Equivalent (identical electrical and mechanical specifications), Direct Manufacturer (cross-manufacturer equivalent), and Similar (compatible with minor parameter variations). All substitutes maintain the same fuse cartridge glass construction and fast-blow response characteristic.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring long-term availability and environmental regulatory adherence.

5SFP 1-R (Bel Fuse Inc.): Parametric equivalent from the same manufacturer. Identical electrical and mechanical specifications. Approval agencies include CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE, providing broader international certification coverage than the 5MFP 1-R.

0235001.HXEP (Littelfuse Inc.): Direct manufacturer equivalent with 100 A breaking capacity. Dimensional variation of 0.228" diameter x 0.886" length (5.80mm x 22.50mm) versus 5.50mm x 21.00mm nominal. Certifications include CE, CSA, KC, PSE, and UL. Suitable for applications requiring higher breaking capacity.

0217001.MXEP (Littelfuse Inc.): Similar substitute with 35 A breaking capacity. Dimensional variation of 0.228" diameter x 0.886" length (5.80mm x 22.50mm). Broadest certification coverage including BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. Melting I²t of 1.045 provides intermediate thermal response between 5MFP 1-R and 5SFP 1-R.

FSD-P-1A (OptiFuse): Parametric equivalent with 35 A breaking capacity. Identical 5.50mm x 21.00mm dimensions. Certifications include cURus and IEC 60127. Highest inventory availability (9414 pcs).

Frequently Asked Questions (FAQ)

Q: Can I substitute 5MFP 1-R with 5SFP 1-R? A: Yes. Both are 1 A, 250 V fast-blow glass cartridge fuses in 5mm x 20mm packages from Bel Fuse Inc. with identical electrical and mechanical specifications. The 5SFP 1-R provides additional international certifications (CCC, IMQ, SEMKO, VDE).

Q: What is the difference between breaking capacity ratings? A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The 5MFP 1-R has 200 A breaking capacity, while 5SFP 1-R, 0217001.MXEP, and FSD-P-1A have 35 A. The 0235001.HXEP has 100 A. All are suitable for 1 A rated applications; higher breaking capacity provides additional safety margin in high-fault-current environments.

Q: Are dimensional variations between 5mm x 20mm and 5.80mm x 22.50mm packages compatible? A: Littelfuse parts (0235001.HXEP and 0217001.MXEP) have slightly larger dimensions. Mechanical compatibility depends on fuse holder design. Verify holder specifications before substitution. Bel Fuse 5MFP 1-R, 5SFP 1-R, and OptiFuse FSD-P-1A maintain nominal 5mm x 20mm dimensions.

Q: Which substitute has the best certification coverage? A: The 0217001.MXEP (Littelfuse) provides the broadest regulatory approval with BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE certifications, suitable for global applications.

Q: What does melting I²t indicate? A: Melting I²t is the thermal energy required to melt the fuse element. Lower values indicate faster response to overcurrent. The 5MFP 1-R (0.877) responds faster than 5SFP 1-R (1.6), affecting circuit protection timing characteristics.

Q: Is the 5MFP 1-R still in production? A: Yes, the 5MFP 1-R maintains Active product status with 1330 pcs in stock. All listed substitutes are also Active status, ensuring continued availability.