Equivalent & Substitute Parts for 5HF 250-R Ceramic Fuse

Part Overview

The 5HF 250-R is a 250 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 requires a compatible holder for installation and is designed for fast-blow response applications requiring ceramic construction and high breaking capacity.

Key Parameters

Parameter	Value
Current Rating	250 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 250-R is determined by strict equivalence across the following parameters:

Current Rating: 250 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. Variations in secondary parameters such as DC cold resistance, melting I²t, and dimensional tolerances do not affect functional substitutability within the specified electrical and mechanical constraints.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating	Voltage Rating (AC)	Package / Case	Response Time	Breaking Capacity	Product Status	Melting I²t	DC Cold Resistance (Ohms)
5HF 250-R	Bel Fuse Inc.	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Obsolete	0.028	0.9
BK/S501-250-R	Eaton - Electronics Division	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.027	4.4
0216.250HXP	Littelfuse Inc.	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.00891	2.35
0216.250MXBP	Littelfuse Inc.	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.00891	2.35
0216.250MXP	Littelfuse Inc.	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.00891	2.35
0216.250TXP	Littelfuse Inc.	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.00891	2.35
0216.250VXP	Littelfuse Inc.	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.00891	2.35
GDA-250MA	Eaton - Electronics Division	250 mA	250 V	5mm x 20mm	Fast Blow	1.5 kA	Active	0.027	4.4

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the 5HF 250-R and meet the specified electrical and mechanical requirements. Selection should be based on the following criteria:

Product Status: All substitute parts carry Active product status, ensuring long-term availability and supply chain continuity. The original 5HF 250-R is obsolete and should be replaced in new designs.

Compliance and Certifications: Littelfuse 216 series parts (0216.250HXP, 0216.250MXBP, 0216.250MXP, 0216.250TXP, 0216.250VXP) hold certifications including CCC, CE, CSA, SEMKO, UR, and VDE. Eaton parts (BK/S501-250-R, GDA-250MA) hold certifications including BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. Both manufacturers' offerings are ROHS3 compliant and REACH unaffected.

Inventory Availability: Littelfuse 0216.250MXP offers the highest current inventory (2076 pcs), followed by 0216.250HXP (1155 pcs). Eaton BK/S501-250-R and GDA-250MA each maintain over 700 pcs in stock.

Dimensional Tolerance: Littelfuse parts specify 5.20mm diameter versus the original 5.10mm, representing a 0.10mm increase within typical mechanical tolerance ranges for cartridge fuse applications.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 5HF 250-R?

A: Yes. All listed parts meet identical electrical specifications (250 mA, 250 V, 1.5 kA breaking capacity, fast-blow response) and mechanical requirements (5mm x 20mm cartridge format, requires holder mounting). They are functionally equivalent for circuit protection applications.

Q: What is the difference between the Littelfuse 216 series variants (0216.250HXP, 0216.250MXP, 0216.250TXP, 0216.250VXP)?

A: These parts share identical electrical and mechanical specifications. The suffix designations (HXP, MXP, TXP, VXP) indicate internal construction or packaging variations that do not affect substitutability. Selection can be based on availability and supply chain preference.

Q: Are there differences between Eaton and Littelfuse substitutes?

A: Both manufacturers provide parts meeting the same electrical and mechanical requirements. Eaton parts (BK/S501-250-R, GDA-250MA) exhibit higher DC cold resistance (4.4 Ohms) compared to Littelfuse parts (2.35 Ohms). This difference does not affect circuit protection performance within the specified operating parameters.

Q: Does the 0.10mm diameter difference in Littelfuse parts affect compatibility?

A: No. Littelfuse parts specify 5.20mm diameter versus the original 5.10mm. This falls within standard mechanical tolerance ranges for 5mm x 20mm cartridge fuse holders and does not compromise mechanical fit or electrical performance.

Q: Which substitute should I select for new designs?

A: For new designs, select from parts with Active product status. Littelfuse 0216.250MXP is recommended based on highest inventory availability (2076 pcs) and comprehensive certification coverage (CCC, CE, CSA, SEMKO, UR, VDE). Eaton BK/S501-250-R is an alternative with equivalent specifications and broader certification scope including BSI and IMQ.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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