Littelfuse, Inc. Datasheets for Resettable PTCs

Resettable (polymeric or positive temperature coefficient -  PTC) fuses are unlike traditional fuses that have to be replaced after a fault condition, this may not be necessary when using resettable fuses. The internal resistance of the component increases in response to an overcurrent or a short-circuit condition, limiting subsequent disturbances. After the fault condition is removed, the device cools and the internal resistance drops to nearly its initial value, permitting normal equipment operation to resume.
Resettable PTCs: Learn more

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Product Name Notes
Surface Mount Resettable PTCs -- AHS080-2018-2
Surface Mount Resettable PTCs -- AHS120-2
Surface Mount Resettable PTCs -- AHS160-2
Surface Mount Resettable PTCs -- AHS200-2
Surface Mount Resettable PTCs -- AHS300-2
Surface Mount Resettable PTCs -- ASMD030F-2
Surface Mount Resettable PTCs -- ASMD050F-2
Surface Mount Resettable PTCs -- ASMD075F-2
Surface Mount Resettable PTCs -- ASMD100F-2
Surface Mount Resettable PTCs -- ASMD125F-2
Surface Mount Resettable PTCs -- ASMD150F-2
Surface Mount Resettable PTCs -- ASMD150F/33-2
Surface Mount Resettable PTCs -- ASMD185F-2
Surface Mount Resettable PTCs -- ASMD200F-2
Surface Mount Resettable PTCs -- ASMD250F-2
Surface Mount Resettable PTCs -- microASMD005F-2
Surface Mount Resettable PTCs -- microASMD010F-2
Surface Mount Resettable PTCs -- MICROASMD050F-2
Helping to reduce weight of wire harnesses. PPTC devices distributed in a circuit can allow the use of smaller wire sizes with the resulting harnesses. Forego looping back and forth...
Radial Leaded Resettable PTCs -- RXEF010S
Radial Leaded Resettable PTCs -- RXEF017
Radial Leaded Resettable PTCs -- RXEF017-2
Radial Leaded Resettable PTCs -- RXEF017-AP
Radial Leaded Resettable PTCs -- RXEF017S
Radial Leaded Resettable PTCs -- RXEF017S-2
Radial Leaded Resettable PTCs -- RXEF020
Radial Leaded Resettable PTCs -- RXEF020-2
Radial Leaded Resettable PTCs -- RXEF020-AP
Radial Leaded Resettable PTCs -- RXEF020S
Radial Leaded Resettable PTCs -- RXEF020S-2
Radial Leaded Resettable PTCs -- RXEF025
Radial Leaded Resettable PTCs -- RXEF025-2
Radial Leaded Resettable PTCs -- RXEF025-AP
Radial Leaded Resettable PTCs -- RXEF030
Radial Leaded Resettable PTCs -- RXEF030-2
Radial Leaded Resettable PTCs -- RXEF030-AP
Radial Leaded Resettable PTCs -- RXEF030S
Radial Leaded Resettable PTCs -- RXEF030S-2
Radial Leaded Resettable PTCs -- RXEF040
Radial Leaded Resettable PTCs -- RXEF040-2
Radial Leaded Resettable PTCs -- RXEF040-AP
Radial Leaded Resettable PTCs -- RXEF040S
Radial Leaded Resettable PTCs -- RXEF040S-2
Radial Leaded Resettable PTCs -- RXEF050
Radial Leaded Resettable PTCs -- RXEF050-1
Radial Leaded Resettable PTCs -- RXEF050-2
Radial Leaded Resettable PTCs -- RXEF050-AP
Radial Leaded Resettable PTCs -- RXEF050S
Radial Leaded Resettable PTCs -- RXEF050S-AP
Radial Leaded Resettable PTCs -- RXEF065
Radial Leaded Resettable PTCs -- RXEF065-2
Radial Leaded Resettable PTCs -- RXEF065-AP
Radial Leaded Resettable PTCs -- RXEF065S
Radial Leaded Resettable PTCs -- RXEF075
Radial Leaded Resettable PTCs -- RXEF075-2
Radial Leaded Resettable PTCs -- RXEF075-AP
Radial Leaded Resettable PTCs -- RXEF075S
Radial Leaded Resettable PTCs -- RXEF090
Radial Leaded Resettable PTCs -- RXEF090-2
Radial Leaded Resettable PTCs -- RXEF090-AP
Radial Leaded Resettable PTCs -- RXEF090S
Radial Leaded Resettable PTCs -- RXEF110
Radial Leaded Resettable PTCs -- RXEF110-2
Radial Leaded Resettable PTCs -- RXEF110-AP
Radial Leaded Resettable PTCs -- RXEF110K
Radial Leaded Resettable PTCs -- RXEF110K-2
Radial Leaded Resettable PTCs -- RXEF110K-AP
Radial Leaded Resettable PTCs -- RXEF135
Radial Leaded Resettable PTCs -- RXEF135-1
Radial Leaded Resettable PTCs -- RXEF135-2
Radial Leaded Resettable PTCs -- RXEF135-AP
Radial Leaded Resettable PTCs -- RXEF135K
Radial Leaded Resettable PTCs -- RXEF135K-2
Radial Leaded Resettable PTCs -- RXEF135K-AP
Radial Leaded Resettable PTCs -- RXEF160
Radial Leaded Resettable PTCs -- RXEF160-2
Radial Leaded Resettable PTCs -- RXEF160-AP
Radial Leaded Resettable PTCs -- RXEF160K
Radial Leaded Resettable PTCs -- RXEF160K-2
Radial Leaded Resettable PTCs -- RXEF185
Radial Leaded Resettable PTCs -- RXEF185-1
Radial Leaded Resettable PTCs -- RXEF185-2
Radial Leaded Resettable PTCs -- RXEF185-AP
Radial Leaded Resettable PTCs -- RXEF185K
Radial Leaded Resettable PTCs -- RXEF185K-2
Radial Leaded Resettable PTCs -- RXEF185K-AP
Radial Leaded Resettable PTCs -- RXEF250
Radial Leaded Resettable PTCs -- RXEF250-2
Radial Leaded Resettable PTCs -- RXEF250-AP
Radial Leaded Resettable PTCs -- RXEF250K
Radial Leaded Resettable PTCs -- RXEF250K-2
Radial Leaded Resettable PTCs -- RXEF300
Radial Leaded Resettable PTCs -- RXEF300-1
Radial Leaded Resettable PTCs -- RXEF300-2
Radial Leaded Resettable PTCs -- RXEF300-AP
Radial Leaded Resettable PTCs -- RXEF300K
Radial Leaded Resettable PTCs -- RXEF300K-2
Radial Leaded Resettable PTCs -- RXEF375
Radial Leaded Resettable PTCs -- RXEF375-1
Radial Leaded Resettable PTCs -- RXEF375K
Our radial-leaded products represent the most comprehensive and complete set of PPTC products available in the industry today. RGEF series for hold currents up to 14A. RHEF series for flatter...
Surface Mount Resettable PTCs -- 0402L010SL
Surface Mount Resettable PTCs -- 0402L020SL
Surface Mount Resettable PTCs -- 0402L035SL
Surface Mount Resettable PTCs -- 0402L050SL
The 0402L Series PTC provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: RoHS compliant, lead-free and halogen free Fast...
Surface Mount Resettable PTCs -- 0603L004
Surface Mount Resettable PTCs -- 0603L010
Surface Mount Resettable PTCs -- 0603L020
Surface Mount Resettable PTCs -- 0603L025
Surface Mount Resettable PTCs -- 0603L035
Surface Mount Resettable PTCs -- 0603L050
The 0603L Series PTC provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: RoHS compliant, lead-free and halogen free Fast...
Surface Mount Resettable PTCs -- 0805L005/30
Surface Mount Resettable PTCs -- 0805L010
Surface Mount Resettable PTCs -- 0805L010/24
Surface Mount Resettable PTCs -- 0805L020
Surface Mount Resettable PTCs -- 0805L035
Surface Mount Resettable PTCs -- 0805L050
Surface Mount Resettable PTCs -- 0805L075
Surface Mount Resettable PTCs -- 0805L100
Surface Mount Resettable PTCs -- 0805L110
The 0805L Series PTC provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: RoHS compliant, lead-free, and halogen-free Fast response...
Surface Mount Resettable PTCs -- 1206L005/60
Surface Mount Resettable PTCs -- 1206L010/60
Surface Mount Resettable PTCs -- 1206L012
Surface Mount Resettable PTCs -- 1206L016
Surface Mount Resettable PTCs -- 1206L020
Surface Mount Resettable PTCs -- 1206L025
Surface Mount Resettable PTCs -- 1206L035
Surface Mount Resettable PTCs -- 1206L035/16
Surface Mount Resettable PTCs -- 1206L035/30
Surface Mount Resettable PTCs -- 1206L050
Surface Mount Resettable PTCs -- 1206L050/15
Surface Mount Resettable PTCs -- 1206L050/24
Surface Mount Resettable PTCs -- 1206L075
Surface Mount Resettable PTCs -- 1206L075/13.2
Surface Mount Resettable PTCs -- 1206L075/16
Surface Mount Resettable PTCs -- 1206L075TH
Surface Mount Resettable PTCs -- 1206L110
Surface Mount Resettable PTCs -- 1206L110TH
Surface Mount Resettable PTCs -- 1206L150
Surface Mount Resettable PTCs -- 1206L150TH
Surface Mount Resettable PTCs -- 1206L175
Surface Mount Resettable PTCs -- 1206L200
The 1206L Series PTC provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: RoHS compliant, lead-free and halogen-free Fast response...
Surface Mount Resettable PTCs -- 1210L005
Surface Mount Resettable PTCs -- 1210L010
Surface Mount Resettable PTCs -- 1210L020
Surface Mount Resettable PTCs -- 1210L035
Surface Mount Resettable PTCs -- 1210L035/30
Surface Mount Resettable PTCs -- 1210L050
Surface Mount Resettable PTCs -- 1210L050/30
Surface Mount Resettable PTCs -- 1210L075
Surface Mount Resettable PTCs -- 1210L075/24
Surface Mount Resettable PTCs -- 1210L110/12
Surface Mount Resettable PTCs -- 1210L110/16
Surface Mount Resettable PTCs -- 1210L110TH
Surface Mount Resettable PTCs -- 1210L150/16
Surface Mount Resettable PTCs -- 1210L150TH
Surface Mount Resettable PTCs -- 1210L175
Surface Mount Resettable PTCs -- 1210L200
The 1210L series device provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: RoHS compliant and lead-free Fast response to...
Surface Mount Resettable PTCs -- 1812L010/60
Surface Mount Resettable PTCs -- 1812L020/60
Surface Mount Resettable PTCs -- 1812L035/30
Surface Mount Resettable PTCs -- 1812L050/60
Surface Mount Resettable PTCs -- 1812L200/12
Surface Mount Resettable PTCs -- 1812L200/16
Surface Mount Resettable PTCs -- 1812L260/16
The 1812L series device provides surface mount overcurrent protection for applications where resettable protection is desired. Features: RoHS compliant and lead-free Fast response to fault currents Compact design saves board...
Surface Mount Resettable PTCs -- 1812L010
Surface Mount Resettable PTCs -- 1812L014
Surface Mount Resettable PTCs -- 1812L020
Surface Mount Resettable PTCs -- 1812L050
Surface Mount Resettable PTCs -- 1812L050/30
Surface Mount Resettable PTCs -- 1812L075
Surface Mount Resettable PTCs -- 1812L075/24
Surface Mount Resettable PTCs -- 1812L075/33
Surface Mount Resettable PTCs -- 1812L110
Surface Mount Resettable PTCs -- 1812L110/16
Surface Mount Resettable PTCs -- 1812L110/24
Surface Mount Resettable PTCs -- 1812L110/33
Surface Mount Resettable PTCs -- 1812L125
Surface Mount Resettable PTCs -- 1812L125/16
Surface Mount Resettable PTCs -- 1812L125/6
Surface Mount Resettable PTCs -- 1812L150
Surface Mount Resettable PTCs -- 1812L150/12
Surface Mount Resettable PTCs -- 1812L150/16
Surface Mount Resettable PTCs -- 1812L150/24
Surface Mount Resettable PTCs -- 1812L160
Surface Mount Resettable PTCs -- 1812L160/12
Surface Mount Resettable PTCs -- 1812L200
Surface Mount Resettable PTCs -- 1812L200TH
Surface Mount Resettable PTCs -- 1812L260
Surface Mount Resettable PTCs -- 1812L260/12
Surface Mount Resettable PTCs -- 1812L260TH
Surface Mount Resettable PTCs -- 1812L300
The 1812L series device provides surface mount overcurrent protection for applications where resettable protection is desired. Features RoHS compliant and lead-free Fast response to fault currents Compact design saves board...
Surface Mount Resettable PTCs -- 2016L150/33
Surface Mount Resettable PTCs -- 2016L260/24
Surface Mount Resettable PTCs -- 2016L300/16
Surface Mount Resettable PTCs -- 2016L500
The 2016L series device provides surface mount overcurrent protection for low voltage (?60V) applications where resettable protection is desired. Features: RoHS compliant and lead-free Fast response to fault currents High...
Surface Mount Resettable PTCs -- 2016L030
Surface Mount Resettable PTCs -- 2016L050
Surface Mount Resettable PTCs -- 2016L075/60
Surface Mount Resettable PTCs -- 2016L100
Surface Mount Resettable PTCs -- 2016L100/33
Surface Mount Resettable PTCs -- 2016L150
Surface Mount Resettable PTCs -- 2016L200
The 2016L series device provides surface mount overcurrent protection for low voltage (?60V) applications where resettable protection is desired. Features RoHS compliant and lead-free Fast response to fault currents High...
Surface Mount Resettable PTCs -- 2920L110/60
Surface Mount Resettable PTCs -- 2920L260/24
Surface Mount Resettable PTCs -- 2920L330/24
Surface Mount Resettable PTCs -- 2920L400/15
Surface Mount Resettable PTCs -- 2920L500/16
Surface Mount Resettable PTCs -- 2920L600/12
Surface Mount Resettable PTCs -- 2920L700/12
The 2920L series device provides surface mount overcurrent protection for medium voltage (?60V) applications where resettable protection is desired. Features: RoHS compliant and lead-free Fast response to fault currents High...
Surface Mount Resettable PTCs -- 2920L030
Surface Mount Resettable PTCs -- 2920L050
Surface Mount Resettable PTCs -- 2920L075
Surface Mount Resettable PTCs -- 2920L075/60
Surface Mount Resettable PTCs -- 2920L100
Surface Mount Resettable PTCs -- 2920L125
Surface Mount Resettable PTCs -- 2920L150
Surface Mount Resettable PTCs -- 2920L185
Surface Mount Resettable PTCs -- 2920L200
Surface Mount Resettable PTCs -- 2920L200/24
Surface Mount Resettable PTCs -- 2920L250
Surface Mount Resettable PTCs -- 2920L260
Surface Mount Resettable PTCs -- 2920L300
Surface Mount Resettable PTCs -- 2920L300/15
The 2920L series device provides surface mount overcurrent protection for medium voltage (?60V) applications where resettable protection is desired. Features RoHS compliant and lead-free Fast response to fault currents High...
Surface Mount Resettable PTCs -- ASMDC030F-2
Surface Mount Resettable PTCs -- ASMDC050F-2
Surface Mount Resettable PTCs -- ASMDC075F-2
Surface Mount Resettable PTCs -- ASMDC125F/33-2
Surface Mount Resettable PTCs -- ASMDC185F/33-2
Surface Mount Resettable PTCs -- ASMDC300F/24-2
The ASMDC PPTC offers a lower profile form factor for better space saving and provides higher VDC and IHOLD rating, most robust performance compared to the competitors in the...
Surface Mount Resettable PTCs -- decaSMDC050F/60-2 The decaSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired.. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- FEMTOASMDC005F-2
Surface Mount Resettable PTCs -- FEMTOASMDC008F-2
Surface Mount Resettable PTCs -- FEMTOASMDC010F/15-2
The femtoASMD is the first small-sized 0603 PPTC series from Littelfuse with AEC-Q200 qualification for Automotive Applications and it provides surface mount overcurrent protection for applications where space is a...
Surface Mount Resettable PTCs -- femtoSMDC005F-2
Surface Mount Resettable PTCs -- femtoSMDC008F-2
Surface Mount Resettable PTCs -- femtoSMDC010F-2
Surface Mount Resettable PTCs -- femtoSMDC010F/15-2
Surface Mount Resettable PTCs -- femtoSMDC012F-2
Surface Mount Resettable PTCs -- femtoSMDC016F-2
Surface Mount Resettable PTCs -- femtoSMDC020F-2
Surface Mount Resettable PTCs -- femtoSMDC035F-02
The femtoSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired.. Features: Broadest range of resettable devices available in industry...
Surface Mount Resettable PTCs -- MICROSMDCH010F-02 The High Temperature SMD is the High Temperature PPTC series from Littelfuse for Industrial and Automotive Applications. It provides surface mount overcurrent protection for applications where space is a prime...
Surface Mount Resettable PTCs -- microSMD005F-2
Surface Mount Resettable PTCs -- microSMD010F-2
Surface Mount Resettable PTCs -- microSMD035F-2
Surface Mount Resettable PTCs -- microSMD050F-2
Surface Mount Resettable PTCs -- microSMD075F-2
Surface Mount Resettable PTCs -- microSMD110F-2
Surface Mount Resettable PTCs -- microSMD150F-2
Surface Mount Resettable PTCs -- microSMD175F-2
Surface Mount Resettable PTCs -- microSMD200F-2
The microSMD series provides surface mount overcurrent protection for applications where space is at a premium and resettable protection is desired. Features: Broadest range of resettable devices available in industry...

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