Equivalent & Substitute Parts for 5HF 100-R Ceramic Fuse

Part Overview

The 5HF 100-R is a 100 mA, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This part is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs. The fuse is designed for fast-blow response and requires a compatible holder for installation. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and breaking capacity to ensure proper circuit protection without modification to existing fuse holders.

Key Parameters

Parameter	Value
Current Rating	100 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Package / Case	5mm x 20mm
Response Time	Fast Blow
Breaking Capacity @ Rated Voltage	1.5 kA
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility for the 5HF 100-R is determined by strict compliance with the following parameters:

Current Rating: 100 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity: 1.5 kA (exact match required)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these criteria and are compatible with existing 5mm x 20mm fuse holders. Variations in secondary parameters such as melting I²t, DC cold resistance, and approval agencies do not affect functional interchangeability within the specified electrical and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage Rating (AC)	Package / Case	Response Time	Breaking Capacity	Product Status	Melting I²t	DC Cold Resistance (Ohms)
5HF 100-R	Bel Fuse Inc.	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Obsolete	0.003	3.85
0216.100MXP	Littelfuse	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0045	5.7925
BK/S501-100-R	Eaton - Electronics Division	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0018	20
0216.100HXP	Littelfuse Inc.	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0045	5.7925
0216.100TXP	Littelfuse Inc.	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0045	5.7925
0216.100VXP	Littelfuse Inc.	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0045	5.7925
GDA-100MA	Eaton - Electronics Division	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0018	20
S501-100-R	Eaton - Electronics Division	100 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.0018	20

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, providing long-term availability compared to the obsolete 5HF 100-R. Selection should prioritize parts with the broadest approval agency coverage for regulatory compliance requirements.

Littelfuse 216 series parts (0216.100MXP, 0216.100HXP, 0216.100TXP, 0216.100VXP) carry certifications from CCC, CE, CSA, SEMKO, UR, and VDE, offering the widest international compliance scope. These parts are suitable for applications requiring multi-region regulatory approval.

Eaton S501 and GDA series parts (BK/S501-100-R, GDA-100MA, S501-100-R) carry CSA and cULus/cURus certifications, appropriate for North American applications. The BK/S501-100-R variant includes MSL Level 1 rating, indicating moisture sensitivity considerations for storage and handling.

All substitute parts maintain the required 1.5 kA breaking capacity and 5mm x 20mm mechanical form factor, ensuring direct compatibility with existing fuse holder installations without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 5HF 100-R?

A: Yes. All listed parts meet the mandatory electrical and mechanical parameters: 100 mA current rating, 250 V AC voltage rating, 5mm x 20mm package, fast-blow response, and 1.5 kA breaking capacity. They are mechanically and electrically compatible with existing 5mm x 20mm fuse holders.

Q: What is the difference between the Littelfuse 216 series variants (0216.100MXP, 0216.100HXP, 0216.100TXP, 0216.100VXP)?

A: These parts share identical electrical ratings, voltage, current, breaking capacity, and package dimensions. Differences exist in melting I²t and DC cold resistance values, but all variants maintain the same functional performance within the specified 100 mA, 250 V fast-blow classification. Selection between variants should be based on regulatory certification requirements and inventory availability.

Q: Are there differences between Eaton S501 and GDA series parts?

A: Both series meet the core substitution criteria. The BK/S501-100-R variant carries MSL Level 1 rating, indicating moisture sensitivity during storage. The GDA-100MA does not specify MSL rating. Both maintain identical electrical performance and 5mm x 20mm compatibility.

Q: What certifications should I consider for my application?

A: Littelfuse 216 series parts include CCC, CE, CSA, SEMKO, UR, and VDE certifications. Eaton parts include CSA and cULus/cURus certifications. Select based on your target market and regulatory requirements. All parts are ROHS3 compliant and REACH unaffected.

Q: Will substituting the 5HF 100-R require any circuit modifications?

A: No. All substitute parts maintain the 5mm x 20mm form factor and require the same holder type. Direct installation in existing fuse holders is supported without circuit or mechanical modifications.

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