RXEF185K

$0.61

Description：PTC RESET FUSE 72V 1.85A RADIAL
Series：PolySwitch®, RXEF
Mfr：Littelfuse Inc.
Package：Bag

SKU:d3d9158957bb Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

RXEF185K is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 72V 1.85A RADIAL. Review the specifications below when checking this part for your BOM.

Ptc Resettable Fuses specifications for RXEF185K

Description：PTC RESET FUSE 72V 1.85A RADIAL
Series：PolySwitch®, RXEF
Mfr：Littelfuse Inc.
Package：Bag
Type：Polymeric
Voltage - Max：72V
Current - Hold (Ih) (Max)：1.85 A
Current - Trip (It)：3.7 A
Current - Max：40 A
Time to Trip：12.6 s
Resistance - Initial (Ri) (Min)：80 mOhms
Resistance - Post Trip (R1) (Max)：190 mOhms
Operating Temperature：-40°C ~ 85°C
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.660" Dia x 0.118" T (16.76mm x 3.00mm)
Height - Seated (Max)：0.906" (23.00mm)
Thickness (Max)：-
Lead Spacing：0.199" (5.05mm)

Ptc Resettable Fuses datasheet and documents for RXEF185K

RXEF185K

Ptc Resettable Fuses Overview

The Littelfuse RXEF185K is a PolySwitch radial-leaded polymer PTC resettable fuse designed for overcurrent protection. It features a hold current of 1.85 A and a trip current of 3.7 A, with a maximum voltage rating of 72 VDC. The device has a maximum interrupting rating of 40 A and an initial resistance of 80 mOhms minimum, rising to a maximum post-trip resistance of 190 mOhms. It operates within a temperature range of -40°C to +85°C and utilizes a radial through-hole package with a 5.8 mm lead spacing.

Ptc Resettable Fuses Feature Summary

Resettable overcurrent protection utilizing polymer positive temperature coefficient technology
Radial leaded form factor compatible with high-volume electronics assembly processes
Certified by UL, CSA, TUV, and CQC agencies for global compliance

Ptc Resettable Fuses Applications

Satellite video receivers
Industrial controls
Computer motherboards
USB hubs, ports and peripherals
Battery packs

Ptc Resettable Fuses Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging configuration, such as bulk or tape-and-reel formats. Ensure the selected variant matches the required axial or radial lead dimensions and that all agency approval markings align with the target market regulations. Cross-reference the component number with the latest datasheet revision to confirm active status and material composition details.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection requires a resettable solution with a 72V DC maximum voltage rating and a 1.85A hold current. The radial leaded package is suitable for through-hole PCB mounting where space allows for larger footprints compared to surface mount alternatives. Consider the 190 mOhms maximum post-trip resistance for thermal management calculations in the final design.

Ptc Resettable Fuses Part Context

The RXEF185K belongs to the Littelfuse PolySwitch RXEF series, which provides radial-leaded PPTC devices. This series is characterized by low hold currents down to 50mA and high voltage ratings up to 72V. The RXEF line represents a comprehensive set of overcurrent protection products compatible with standard electronics assembly methods, offering a balance of performance and regulatory approvals.