Equivalent & Substitute Parts for 5SF 10

Part Overview

The 5SF 10 is a 10 A 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm form factor manufactured by Bel Fuse Inc. This part is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Key Parameters

Parameter	Value
Current Rating	10 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	100 A
Operating Temperature Range	-55°C to 125°C

Substitute Part Grouping Explanation

Substitution for the 5SF 10 is determined by strict equivalence across the following critical parameters:

Current Rating: 10 A (exact match required)
Voltage Rating: 250 V AC (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)
Breaking Capacity: 100 A (exact match required)

All substitute parts listed below meet these criteria and are sourced from active manufacturers with current product status. Substitutes are grouped by manufacturer and part classification (parametric equivalent, direct equivalent, or similar).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage (V AC)	Fuse Type	Response Time	Package	Breaking Capacity (A)	Product Status	RoHS Status
5SF 10	Bel Fuse Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Obsolete	Non-compliant
5SF 10-R	Bel Fuse Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
0034.1526	SCHURTER Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
0217010.MXBP	Littelfuse Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
0217010.MXP	Littelfuse	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
0217010.TXP	Littelfuse Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
0217010.VXP	Littelfuse Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
0217010.HXP	Littelfuse Inc.	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant
GDB-10A	Eaton - Electronics Division	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	Not specified
S500-10-R	Eaton - Electronics Division	10	250	Cartridge, Glass	Fast Blow	5mm x 20mm	100	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the 5SF 10 across all critical electrical and mechanical parameters. Selection should be based on the following factors:

Product Status: The 5SF 10-R from Bel Fuse Inc. is the direct active-status replacement from the original manufacturer and carries identical electrical specifications with RoHS3 compliance.

Compliance & Certifications: Littelfuse 217 series parts (0217010.MXBP, 0217010.MXP, 0217010.TXP, 0217010.VXP, 0217010.HXP) are all active with RoHS3 compliance and support multiple international certifications (CE, KC, PSE, VDE). SCHURTER 0034.1526 is active with RoHS3 compliance and supports cURus, PSE/JET, and VDE certifications. Eaton S500-10-R is active with RoHS3 compliance and supports BSI, CSA, cURus, SEMKO, and VDE certifications.

Availability: Inventory levels vary across manufacturers. Selection may be influenced by supply chain requirements and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can the 5SF 10 be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts meet the identical electrical and mechanical specifications: 10 A, 250 V AC, fast-blow response, 5mm x 20mm cartridge form factor, and 100 A breaking capacity. Physical form factor and holder compatibility are identical.

Q: What is the difference between the 5SF 10 and 5SF 10-R?

A: The 5SF 10-R is the active-status equivalent from Bel Fuse Inc. Both parts are electrically and mechanically identical. The primary difference is product status (obsolete vs. active) and RoHS compliance (non-compliant vs. ROHS3 compliant).

Q: Are there differences in melting I²t values among the substitutes?

A: Yes. The 5SF 10 has a melting I²t of 163. SCHURTER 0034.1526 has 183. Littelfuse 217 series parts have 217.635. These variations fall within the tolerance band for fast-blow 10 A fuses and do not affect functional equivalence for standard circuit protection applications.

Q: Which substitute offers the best compliance coverage?

A: Littelfuse 217 series parts and Eaton S500-10-R offer the broadest international certification support, including CE, VDE, PSE, and regional marks. SCHURTER 0034.1526 supports cURus, PSE/JET, and VDE. Selection should align with target market requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All substitute parts are pin-compatible, form-factor compatible, and electrically equivalent. No circuit redesign or holder modification is required.

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