60R160XF Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 60R160XF is an active polymeric PTC resettable fuse rated for 60V maximum voltage with 1.6A hold current. This through-hole radial disc component provides overcurrent protection in electronic circuits and automatically resets after fault conditions are cleared. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or design flexibility across approved alternatives.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	1.6 A
Current - Trip (It)	3.2 A
Current - Max	40 A
Time to Trip	11.4 s
Resistance - Initial (Ri) (Min)	90 mOhms
Resistance - Post Trip (R1) (Max)	220 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Type	Polymeric

Substitute Part Grouping Explanation

Substitute parts for the 60R160XF are classified based on the following substitution criteria:

Voltage Rating Equivalence: The 60R160XF operates at 60V maximum. Substitutes at higher voltage ratings (72V, 90V) are electrically compatible in 60V circuits, as they provide equal or greater voltage withstand capability.

Current Parameters: All substitutes maintain identical hold current (1.6A), trip current (3.2A), maximum current (40A), and trip time (11.4s) specifications.

Resistance Characteristics: Initial resistance (90 mOhms minimum) and post-trip resistance (220 mOhms maximum) are identical across all substitutes.

Mechanical Compatibility: All substitutes feature through-hole radial disc mounting with compatible lead spacing (0.199" to 0.201") and similar physical dimensions suitable for standard PCB layouts.

Thermal Range: Operating temperature range of -40°C to 85°C is maintained across all substitutes.

Compliance & Certifications: All substitutes maintain ROHS3 compliance and REACH unaffected status. Approval agencies vary by manufacturer but include cURus, TUV, UL, and CSA certifications.

Parameter Comparison

Parameter	60R160XF (Littelfuse)	RXEF160 (Littelfuse)	72R160XF (Littelfuse)	0ZRC0160FF1A (Bel Fuse)	RS60RB-160 (OptiFuse)	MF-RX160/72-0 (Bourns)
Voltage - Max	60V	72V	72V	90V	60V	72V
Current - Hold (Ih) (Max)	1.6 A	1.6 A	1.6 A	1.6 A	1.6 A	1.6 A
Current - Trip (It)	3.2 A	3.2 A	3.2 A	3.2 A	3.2 A	3.2 A
Current - Max	40 A	40 A	40 A	40 A	40 A	40 A
Time to Trip	11.4 s	11.4 s	11.4 s	11.4 s	11.4 s	11.4 s
Resistance - Initial (Ri) (Min)	90 mOhms	90 mOhms	90 mOhms	90 mOhms	90 mOhms	90 mOhms
Resistance - Post Trip (R1) (Max)	220 mOhms	220 mOhms	220 mOhms	220 mOhms	220 mOhms	220 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc
Type	Polymeric	Polymeric	Polymeric	Polymeric	Polymeric	Polymeric
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	Not specified	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain active product status and full compliance with ROHS3 environmental standards. Selection among equivalents should be based on the following factors:

Same Voltage Rating (60V): RS60RB-160 (OptiFuse) provides direct voltage equivalence to the 60R160XF. This part is suitable for applications where 60V maximum rating is the design specification.

Higher Voltage Rating (72V): RXEF160 (Littelfuse), 72R160XF (Littelfuse), and MF-RX160/72-0 (Bourns) are rated for 72V operation. These parts are electrically compatible in 60V circuits and provide additional voltage margin. RXEF160 is manufacturer-recommended by Littelfuse.

Highest Voltage Rating (90V): 0ZRC0160FF1A (Bel Fuse) offers the highest voltage rating at 90V and includes AEC-Q200 automotive qualification. This part is suitable for applications requiring enhanced voltage withstand capability or automotive-grade reliability.

Certification Scope: All parts carry cURus and TUV approvals. RXEF160 and MF-RX160/72-0 include additional UL and CSA certifications, providing broader regulatory acceptance across North American and international markets.

Packaging Considerations: The 60R160XF is supplied in bulk packaging. Substitute parts are available in bulk, bag, or box packaging depending on manufacturer. Packaging format does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can I use a 72V-rated substitute in a 60V circuit? A: Yes. The 72V-rated substitutes (RXEF160, 72R160XF, MF-RX160/72-0) are electrically compatible in 60V applications. Higher voltage ratings provide equal or greater performance in lower voltage circuits.

Q: What is the difference between the Littelfuse POLY-FUSE® 60R160XF and 72R160XF series? A: Both parts are Littelfuse polymeric PTC resettable fuses with identical electrical characteristics (1.6A hold current, 3.2A trip current, 11.4s trip time). The primary difference is voltage rating: 60R160XF is rated for 60V maximum, while 72R160XF is rated for 72V maximum. Physical dimensions and lead spacing are identical.

Q: Are all substitutes mechanically compatible with the original 60R160XF footprint? A: Yes. All substitutes feature through-hole radial disc mounting with lead spacing between 0.199" and 0.201", compatible with standard PCB layouts designed for the 60R160XF. Physical dimensions vary slightly but remain within acceptable tolerances for radial component placement.

Q: Which substitute offers the broadest regulatory approval? A: RXEF160 (Littelfuse PolySwitch® series) and MF-RX160/72-0 (Bourns Multifuse® series) include the most comprehensive certifications: cURus, TUV, UL, and CSA. These approvals support deployment across North American and international markets.

Q: Does the 0ZRC0160FF1A from Bel Fuse include automotive qualification? A: Yes. The 0ZRC0160FF1A carries AEC-Q200 automotive qualification, making it suitable for automotive and high-reliability applications requiring enhanced qualification standards.

Q: Are there differences in initial or post-trip resistance among substitutes? A: No. All substitutes maintain identical resistance specifications: 90 mOhms minimum initial resistance and 220 mOhms maximum post-trip resistance.

Q: Can I mix different manufacturers' parts in the same circuit design? A: Yes. All substitutes meet identical electrical and mechanical specifications for the 1.6A hold current rating. However, design documentation should specify the approved part numbers to ensure consistency in production and field service.

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