Equivalent & Substitute Parts for 5MFP 100-R

Part Overview

The Bel Fuse Inc. 5MFP 100-R is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse in a 5mm x 20mm axial package. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain circuit protection functionality in applications where the original component is no longer available from the manufacturer.

Substiute Parts

5MFP 100-R

Bel Fuse Inc.In Stock: 8955MFP 100-R Datasheet

Current PartRFQ

0235.100HXEP

Littelfuse Inc.In Stock: 8020235.100HXEP Datasheet

DirectRFQ

0235.100MXEP

Littelfuse Inc.In Stock: 30640235.100MXEP Datasheet

DirectRFQ

0217.100MXEP

Littelfuse Inc.In Stock: 11530217.100MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5MFP 100-R is determined by strict equivalence across the following parameters: current rating (100 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), package dimensions (5mm x 20mm axial), and mounting type (through hole). All substitute parts must maintain the same operating temperature range (-55°C ~ 125°C) and RoHS3 compliance status.

The substitute parts are grouped into two categories:

Direct Substitutes: Parts that match all critical electrical and mechanical parameters with identical or superior breaking capacity and approval certifications.

Similar Substitutes: Parts that meet all critical electrical and mechanical parameters but may have different electrical characteristics (melting I²t, DC cold resistance) or approval agency certifications.

Parameter Comparison

Engineering Selection Recommendations

0235.100MXEP (Littelfuse) is the primary direct substitute for the 5MFP 100-R. This part maintains all critical electrical and mechanical parameters, carries active product status, and holds CE, CSA, KC, and UL certifications. With 3028 units in stock, it provides immediate availability.

0235.100HXEP (Littelfuse) is an alternative direct substitute with identical electrical specifications and active product status. It carries CE, CSA, KC, and UL certifications. Stock availability is 693 units.

0217.100MXEP (Littelfuse) is a similar substitute that meets all critical electrical and mechanical parameters with active product status. It provides the broadest approval agency coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE) and 1064 units are in stock. The melting I²t (0.0045) and DC cold resistance (5.6965 Ohms) differ from the original part, which may affect response characteristics in specific circuit applications.

All substitute parts are ROHS3 compliant and operate within the same temperature range as the original component.

Frequently Asked Questions (FAQ)

Q: Can 0235.100MXEP directly replace 5MFP 100-R in my circuit?

A: Yes. The 0235.100MXEP matches all critical parameters: 100 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package, and through-hole mounting. Both are ROHS3 compliant and operate across -55°C to 125°C.

Q: What is the difference between 0235.100HXEP and 0235.100MXEP?

A: Both parts are electrically and mechanically identical in all critical parameters. The primary difference is packaging: 0235.100HXEP is supplied in bulk packaging, while 0235.100MXEP is also supplied in bulk. Both carry the same certifications and have identical electrical specifications.

Q: Why does 0217.100MXEP have different melting I²t and DC cold resistance values?

A: The 0217.100MXEP is from the Littelfuse 217 series, which has different internal construction compared to the 235 series. While it meets the same current and voltage ratings with fast-blow response, the melting I²t (0.0045 vs. 0.0009) and DC cold resistance (5.6965 vs. 7.2 Ohms) differ. These differences may affect fuse response time in circuits with specific impedance characteristics.

Q: Are all substitute parts physically compatible with the original PCB footprint?

A: All substitute parts use the same 5mm x 20mm axial package with through-hole mounting. Physical compatibility with existing PCB footprints is confirmed.

Q: Which substitute part has the best availability?

A: The 0235.100MXEP has the highest stock level at 3028 units, followed by 0217.100MXEP at 1064 units, and 0235.100HXEP at 693 units.

Q: Do all substitute parts have the same approval certifications as the original 5MFP 100-R?

A: The original part carries CE, CSA, and cULus certifications. The 0235.100MXEP and 0235.100HXEP carry CE, CSA, KC, and UL certifications. The 0217.100MXEP carries the broadest set: CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. All meet or exceed the original certification requirements.