5SF 160-R Equivalent & Substitute Parts

Part Overview

The 5SF 160-R is a 160 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 functional characteristics to ensure direct compatibility in existing fuse holder assemblies.

Key Parameters

Parameter	Specification
Current Rating	160 mA
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	35A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (160 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), package dimensions (5mm x 20mm), mounting type (requires holder), and breaking capacity (35A). All substitute parts listed meet these core electrical and mechanical requirements.

Parts are grouped into two categories:

Direct Substitutes maintain identical mounting type (requires holder) and all core electrical parameters. These parts are fully interchangeable in existing 5SF 160-R applications.

Similar Parts include the through-hole variant (0034.1508.PT), which differs in mounting type and physical dimensions, and therefore requires mechanical redesign for implementation.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage (AC)	Response Time	Package	Mounting Type	Breaking Capacity	Melting I²t	Product Status
5SF 160-R	Bel Fuse Inc.	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.017	Obsolete
0034.1508	SCHURTER Inc.	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.0113	Active
0217.160MXBP	Littelfuse Inc.	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.01	Active
0217.160MXP	Littelfuse Inc.	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.01	Active
0217.160TXP	Littelfuse Inc.	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.01	Active
0217.160VXP	Littelfuse Inc.	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.01	Active
BK/S500-160-R	Eaton - Electronics Division	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.008	Active
BK/GDB-160MA	Eaton - Electronics Division	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.008	Active
BK1/S500-160-R	Eaton - Electronics Division	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.008	Active
GDB-160MA	Eaton - Electronics Division	160 mA	250 V	Fast Blow	5mm x 20mm	Requires Holder	35A	0.008	Active
0034.1508.PT	SCHURTER Inc.	160 mA	250 V	Fast Blow	5mm x 20mm (Axial)	Through Hole	35A	0.0113	Active

Engineering Selection Recommendations

Direct Substitutes for Holder-Based Applications:

The following parts are active-status equivalents suitable for direct replacement in existing 5SF 160-R applications:

Littelfuse 0217.160MXBP, 0217.160MXP, 0217.160TXP, and 0217.160VXP provide active-status alternatives with comprehensive international certifications (CCC, CE, CSA, UL, VDE). These parts carry identical electrical and mechanical specifications.

SCHURTER 0034.1508 offers an active-status alternative with CCC, cURus, and VDE approvals. Melting I²t value of 0.0113 differs slightly from the original 0.017.

Eaton BK/S500-160-R, BK/GDB-160MA, BK1/S500-160-R, and GDB-160MA provide active-status alternatives with established certifications. Melting I²t values of 0.008 represent faster thermal response compared to the original specification.

For Through-Hole PCB Applications:

SCHURTER 0034.1508.PT is suitable only for applications requiring through-hole mounting. Physical dimensions (5.40mm diameter x 22.50mm length) and axial lead configuration differ from the holder-based form factor. This part requires mechanical redesign and is not a direct replacement for holder-based assemblies.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts directly in my existing 5SF 160-R fuse holder?

A: Yes, all parts listed under "Direct Substitutes" (0034.1508, 0217.160MXBP, 0217.160MXP, 0217.160TXP, 0217.160VXP, BK/S500-160-R, BK/GDB-160MA, BK1/S500-160-R, and GDB-160MA) maintain the 5mm x 20mm package and holder-based mounting type. The 0034.1508.PT through-hole variant cannot be used in holder-based assemblies without mechanical modification.

Q: What is the significance of the melting I²t value differences?

A: Melting I²t indicates the thermal energy required to melt the fuse element. Lower values represent faster thermal response. The original 5SF 160-R specifies 0.017, while substitute parts range from 0.008 to 0.0113. These variations remain within the fast-blow classification and do not affect compatibility in standard applications.

Q: Which substitute parts have the broadest international certification coverage?

A: Littelfuse 0217.160MXBP and 0217.160MXP carry certifications from CCC, CE, CSA, UL, and VDE, providing coverage across North American, European, and Asian markets. Eaton parts carry BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE certifications.

Q: Are there differences in DC cold resistance among the substitute parts?

A: Yes. The original 5SF 160-R specifies 2.25 Ohms. Littelfuse parts (0217.160MXBP, 0217.160MXP, 0217.160TXP, 0217.160VXP) specify 2.525 Ohms. Eaton parts (BK/S500-160-R, BK/GDB-160MA, BK1/S500-160-R, GDB-160MA) specify 9.1 Ohms. These resistance values do not affect fuse function in standard circuit protection applications.

Q: What is the difference between the Littelfuse 0217 series variants?

A: All four Littelfuse variants (0217.160MXBP, 0217.160MXP, 0217.160TXP, 0217.160VXP) share identical electrical specifications, dimensions, and certifications. Designations reflect internal product line variations. Selection among these variants is based on availability and supply chain requirements.

Q: Can I use the SCHURTER 0034.1508.PT in my application?

A: The 0034.1508.PT is a through-hole axial variant with dimensions of 5.40mm diameter x 22.50mm length. It is suitable only for PCB through-hole mounting applications. It cannot be used in fuse holder assemblies designed for the standard 5mm x 20mm cartridge form factor.

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