RKEF110K

$0.17

Description：PTC RESET FUSE 60V 1.1A RADIAL
Series：PolySwitch®
Mfr：Littelfuse Inc.
Package：Bag

SKU:d8132dd3b42e Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

RKEF110K is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 60V 1.1A RADIAL. Review the specifications below when checking this part for your BOM.

Ptc Resettable Fuses specifications for RKEF110K

Description：PTC RESET FUSE 60V 1.1A RADIAL
Series：PolySwitch®
Mfr：Littelfuse Inc.
Package：Bag
Type：Polymeric
Voltage - Max：60V
Current - Hold (Ih) (Max)：1.1 A
Current - Trip (It)：2.2 A
Current - Max：40 A
Time to Trip：3 s
Resistance - Initial (Ri) (Min)：170 mOhms
Resistance - Post Trip (R1) (Max)：280 mOhms
Operating Temperature：-
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.299" L x 0.161" W (7.60mm x 4.10mm)
Height - Seated (Max)：0.591" (15.00mm)
Thickness (Max)：-
Lead Spacing：0.200" (5.08mm)

Ptc Resettable Fuses datasheet and documents for RKEF110K

RKEF110K

Ptc Resettable Fuses Overview

The Littelfuse RKEF110K is a discontinued polymer PTC resettable fuse from the PolySwitch® series, designed for through-hole radial mounting. It features a maximum holding current (Ih) of 1.1 A and a trip current (It) of 2.2 A. The device operates with a maximum voltage of 60 V and can withstand a maximum fault current of 40 A. Initial resistance (Ri) is typically 170 mΩ, rising to a maximum post-trip resistance (R1) of 280 mΩ. It has a trip time of 3 seconds and dimensions of 7.60mm x 4.10mm.

Ptc Resettable Fuses Feature Summary

Provides automatic circuit protection by increasing resistance during overcurrent events
Reverts to low-resistance state after fault clearance and cooling
Designed for radial through-hole PCB integration

Ptc Resettable Fuses Applications

Overcurrent protection in electronic circuits
Battery pack protection systems
Peripheral interface port safeguarding

Ptc Resettable Fuses Procurement Notes

This component is officially obsolete and no longer manufactured by Littelfuse Inc. Verification of availability requires checking authorized distributors for remaining stock or approved direct substitutes. Do not assume functional equivalence with other series without consulting official datasheets. Confirm RoHS3 compliance status if required for specific regulatory environments.

Ptc Resettable Fuses Selection Notes

Select this part only if legacy compatibility is mandatory due to existing board layouts. For new designs, consider active alternatives within the same family that offer updated manufacturing support. Ensure the 60V rating and 1.1A holding current align precisely with the target circuit's operational parameters and fault conditions.

Ptc Resettable Fuses Part Context

Part of the PolySwitch® RKEF series, which offers radial leaded PTC resettable fuses. This series is characterized by compact radial packages suitable for space-constrained applications requiring robust overcurrent protection without permanent replacement upon tripping.