5MF 100 Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The 5MF 100 is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct interchangeability in existing applications.

Substiute Parts

5MF 100

Bel Fuse Inc.In Stock: 11635MF 100 Datasheet

Current PartRFQ

0217.100HXP

Littelfuse Inc.In Stock: 31060217.100HXP Datasheet

SimilarRFQ

BK1/S500-100-R

Eaton - Electronics DivisionIn Stock: 1868BK1/S500-100-R Datasheet

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GDB-100MA

Eaton - Electronics DivisionIn Stock: 960GDB-100MA Datasheet

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S500-100-R

Eaton - Electronics DivisionIn Stock: 805S500-100-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5MF 100 is determined by strict compliance with the following parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating: 250 V AC minimum (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

All qualified substitute parts listed below meet these criteria and are mechanically and electrically compatible with applications originally designed for the 5MF 100.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are electrically and mechanically compatible with the 5MF 100 based on matching current rating, voltage rating, fuse type, response time, and physical dimensions.

For new designs and applications requiring RoHS compliance, the 0217.100HXP (Littelfuse) and S500-100-R (Eaton) are ROHS3 compliant alternatives. The 0217.100HXP additionally provides the broadest approval agency certifications (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE), supporting deployment across multiple regulatory jurisdictions.

For applications where the original 5MF 100 specifications are critical, note that the 5MF 100 provides a higher breaking capacity (200A) and lower melting I²t (0.0009) compared to substitute options (35A breaking capacity, 0.003 melting I²t). These differences should be evaluated against specific circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can the 0217.100HXP, BK1/S500-100-R, GDB-100MA, and S500-100-R be used interchangeably with the 5MF 100?

A: Yes. All substitute parts share identical current rating (100 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), and physical dimensions (5mm x 20mm). They are mechanically and electrically compatible with existing 5mm x 20mm fuse holders designed for the 5MF 100.

Q: What is the primary reason for substitution?

A: The 5MF 100 is classified as obsolete. Active substitute parts ensure continued availability for system maintenance and new implementations.

Q: Are there compliance differences between the main part and substitutes?

A: Yes. The 5MF 100 is RoHS non-compliant. The 0217.100HXP and S500-100-R are ROHS3 compliant. Applications subject to RoHS regulations should specify compliant alternatives.

Q: Do all substitutes have the same breaking capacity?

A: No. The 5MF 100 has a breaking capacity of 200A at rated voltage, while all listed substitutes have 35A breaking capacity. Applications requiring the higher breaking capacity specification should be evaluated for compatibility with substitute parts.

Q: What are the approval agency differences?

A: The 0217.100HXP carries the broadest certification coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE). The 5MF 100 is certified by CE, CSA, and UL. Eaton S500 and GDB series parts do not specify approval agencies in available documentation.

Q: Are there resistance differences between parts?

A: Yes. DC cold resistance varies: 5MF 100 (7.2 Ohms), 0217.100HXP (5.6965 Ohms), BK1/S500-100-R (3.8 Ohms), GDB-100MA (3.8 Ohms), and S500-100-R (3.8 Ohms). These differences are within acceptable tolerance for cartridge fuse applications.

Q: Can I use these substitutes in high-reliability applications?

A: Substitution suitability depends on specific circuit protection requirements, including breaking capacity, melting I²t characteristics, and regulatory compliance needs. Evaluate each substitute against original design specifications before implementation.