The CK PTS125SK43SMTR2LFS tactile switch from LITTELFUSE / C&K COMPONENTS is a high-quality, momentary action switch designed for precise electronic applications. Manufactured in China and RoHS compliant, this switch features versatile termination options and a compact 12 mm size suitable for various consumer, instrumentation, computer, and industrial products.
Key Features & Benefits
Available with Through-Hole (THT) and Surface-Mount (SMT) terminations
Multiple height options, including 4.3 mm, 7.3 mm, 8.5 mm, and 12 mm (other heights available upon request)
Snap-fit actuator option for secure mounting
Silver-plated contacts for enhanced conductivity and durability
RoHS compliant for environmentally responsible manufacturing
Technical Specifications
Function
Momentary action
Contact Arrangement
SPST, N.O. (Single Pole Single Throw, Normally Open)
Terminals
PC pins for THT and G type for SMT
Travel
0.30 mm ± 0.15 mm
Mechanical Life
200,000 cycles
Operating Force
180 gf ± 50, 250 gf ± 50
Electrical Max Voltage
12 VDC
Max Current
50 mA
Dielectric Strength
250 V AC (1 min)
Contact Resistance
< 100 mΩ
Insulation Resistance
> 100 MΩ
Bounce Time
< 5 ms
Operating Temperature
-20°C to 70°C
Electrical & Mechanical Options
Switch Height Options: 4.3 mm, 7.3 mm, 8.5 mm, 12 mm (other heights available upon request)
Actuator Style: Round, Snap Fit (J), or None
Actuator Force: 180 g (M), 250 g (K)
Termination & Packaging: THT in bags, SMT in tape & reel (various parts per reel)
Packaging & Soldering
Soldering Style
Height
Packaging
Parts per Packaging
THT
All heights
Plastic bag
500
SMT
4.3 mm
Tape & reel
900
SMT
4.3 mm with pegs
Tape & reel
600
SMT
7.3 mm
Tape & reel
500
SMT
7.3 mm with pegs
Tape & reel
500
SMT
8.5 mm
Tape & reel
500
SMT
8.5 mm with pegs
Tape & reel
400
SMT
12 mm
Tape & reel
250
Dimensions & Layout
Reel dimensions conform to EIA 481B with an external diameter of 330 mm.
Recommended PCB layouts are provided for SMT versions with round and square snap fit actuators.
Part Details
Part Number: PTS125SK43SMTR2LFS
Manufacturer: LITTELFUSE / C&K COMPONENTS
Country of Origin: CN
UOM: EA
ECCN: EAR99
Package Type: TAPE
For detailed specifications, please refer to the datasheet.
Note: The specifications listed above are for standard options. For custom configurations, please consult the Customer Service Center.
Datasheet was not processed, please search the internet for the part number for more details.
{"id":10027879563581,"title":"PTS125SK43SMTR2LFS","handle":"pts125sk43smtr2lfs","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eCK PTS125SK43SMTR2LFS\u003c\/strong\u003e tactile switch from \u003cstrong\u003eLITTELFUSE \/ C\u0026amp;K COMPONENTS\u003c\/strong\u003e is a high-quality, momentary action switch designed for precise electronic applications. Manufactured in China and RoHS compliant, this switch features versatile termination options and a compact 12 mm size suitable for various consumer, instrumentation, computer, and industrial products.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eAvailable with Through-Hole (THT) and Surface-Mount (SMT) terminations\u003c\/li\u003e\n \u003cli\u003eMultiple height options, including 4.3 mm, 7.3 mm, 8.5 mm, and 12 mm (other heights available upon request)\u003c\/li\u003e\n \u003cli\u003eSnap-fit actuator option for secure mounting\u003c\/li\u003e\n \u003cli\u003eSilver-plated contacts for enhanced conductivity and durability\u003c\/li\u003e\n \u003cli\u003eRoHS compliant for environmentally responsible manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eFunction\u003c\/th\u003e\n \u003ctd\u003eMomentary action\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eContact Arrangement\u003c\/th\u003e\n \u003ctd\u003eSPST, N.O. (Single Pole Single Throw, Normally Open)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eTerminals\u003c\/th\u003e\n \u003ctd\u003ePC pins for THT and G type for SMT\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eTravel\u003c\/th\u003e\n \u003ctd\u003e0.30 mm ± 0.15 mm\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eMechanical Life\u003c\/th\u003e\n \u003ctd\u003e200,000 cycles\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eOperating Force\u003c\/th\u003e\n \u003ctd\u003e180 gf ± 50, 250 gf ± 50\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eElectrical Max Voltage\u003c\/th\u003e\n \u003ctd\u003e12 VDC\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eMax Current\u003c\/th\u003e\n \u003ctd\u003e50 mA\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eDielectric Strength\u003c\/th\u003e\n \u003ctd\u003e250 V AC (1 min)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eContact Resistance\u003c\/th\u003e\n \u003ctd\u003e\u0026lt; 100 mΩ\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eInsulation Resistance\u003c\/th\u003e\n \u003ctd\u003e\u0026gt; 100 MΩ\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eBounce Time\u003c\/th\u003e\n \u003ctd\u003e\u0026lt; 5 ms\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eOperating Temperature\u003c\/th\u003e\n \u003ctd\u003e-20°C to 70°C\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eElectrical \u0026amp; Mechanical Options\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eSwitch Height Options: 4.3 mm, 7.3 mm, 8.5 mm, 12 mm (other heights available upon request)\u003c\/li\u003e\n \u003cli\u003eActuator Style: Round, Snap Fit (J), or None\u003c\/li\u003e\n \u003cli\u003eActuator Force: 180 g (M), 250 g (K)\u003c\/li\u003e\n \u003cli\u003eTermination \u0026amp; Packaging: THT in bags, SMT in tape \u0026amp; reel (various parts per reel)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackaging \u0026amp; Soldering\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eSoldering Style\u003c\/th\u003e\n \u003cth\u003eHeight\u003c\/th\u003e\n \u003cth\u003ePackaging\u003c\/th\u003e\n \u003cth\u003eParts per Packaging\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eTHT\u003c\/td\u003e\n \u003ctd\u003eAll heights\u003c\/td\u003e\n \u003ctd\u003ePlastic bag\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e4.3 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e900\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e4.3 mm with pegs\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e600\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e7.3 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e7.3 mm with pegs\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e8.5 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e8.5 mm with pegs\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e400\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e12 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e250\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDimensions \u0026amp; Layout\u003c\/h3\u003e\n\u003cp\u003eReel dimensions conform to EIA 481B with an external diameter of 330 mm.\u003c\/p\u003e\n\u003cp\u003eRecommended PCB layouts are provided for SMT versions with round and square snap fit actuators.\u003c\/p\u003e\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePart Number: PTS125SK43SMTR2LFS\u003c\/li\u003e\n \u003cli\u003eManufacturer: LITTELFUSE \/ C\u0026amp;K COMPONENTS\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: CN\u003c\/li\u003e\n \u003cli\u003eUOM: EA\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003ePackage Type: TAPE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor detailed specifications, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-ck\/ck-pts125sk43smtr2lfs.pdf\" target=\"_blank\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The specifications listed above are for standard options. For custom configurations, please consult the Customer Service Center.\u003c\/p\u003e\n\u003cp\u003eDatasheet was not processed, please search the internet for the part number for more details.\u003c\/p\u003e\u003cbr\u003e","published_at":"2025-08-16T04:09:40+05:30","created_at":"2025-08-16T04:09:40+05:30","vendor":"Waldom Electonics","type":"Switches","tags":["12VDC","3mm","IMPORT_CSV","IMPORT_PT2","LITTE-CKCO","Switch","Tactile","WLDM"],"price":3146,"price_min":3146,"price_max":3146,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50626237235517,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"PTS125SK43SMTR2LFS","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"PTS125SK43SMTR2LFS","public_title":null,"options":["Default Title"],"price":3146,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"PTS125SK43SMTR2LFS","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/PTS125SK43SMTR2LFS_48235208_ec9a683a.jpg?v=1755297584"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/PTS125SK43SMTR2LFS_48235208_ec9a683a.jpg?v=1755297584","options":["Title"],"media":[{"alt":null,"id":45861563760957,"position":1,"preview_image":{"aspect_ratio":1.12,"height":200,"width":224,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/PTS125SK43SMTR2LFS_48235208_ec9a683a.jpg?v=1755297584"},"aspect_ratio":1.12,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/PTS125SK43SMTR2LFS_48235208_ec9a683a.jpg?v=1755297584","width":224}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eCK PTS125SK43SMTR2LFS\u003c\/strong\u003e tactile switch from \u003cstrong\u003eLITTELFUSE \/ C\u0026amp;K COMPONENTS\u003c\/strong\u003e is a high-quality, momentary action switch designed for precise electronic applications. Manufactured in China and RoHS compliant, this switch features versatile termination options and a compact 12 mm size suitable for various consumer, instrumentation, computer, and industrial products.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eAvailable with Through-Hole (THT) and Surface-Mount (SMT) terminations\u003c\/li\u003e\n \u003cli\u003eMultiple height options, including 4.3 mm, 7.3 mm, 8.5 mm, and 12 mm (other heights available upon request)\u003c\/li\u003e\n \u003cli\u003eSnap-fit actuator option for secure mounting\u003c\/li\u003e\n \u003cli\u003eSilver-plated contacts for enhanced conductivity and durability\u003c\/li\u003e\n \u003cli\u003eRoHS compliant for environmentally responsible manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eFunction\u003c\/th\u003e\n \u003ctd\u003eMomentary action\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eContact Arrangement\u003c\/th\u003e\n \u003ctd\u003eSPST, N.O. (Single Pole Single Throw, Normally Open)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eTerminals\u003c\/th\u003e\n \u003ctd\u003ePC pins for THT and G type for SMT\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eTravel\u003c\/th\u003e\n \u003ctd\u003e0.30 mm ± 0.15 mm\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eMechanical Life\u003c\/th\u003e\n \u003ctd\u003e200,000 cycles\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eOperating Force\u003c\/th\u003e\n \u003ctd\u003e180 gf ± 50, 250 gf ± 50\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eElectrical Max Voltage\u003c\/th\u003e\n \u003ctd\u003e12 VDC\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eMax Current\u003c\/th\u003e\n \u003ctd\u003e50 mA\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eDielectric Strength\u003c\/th\u003e\n \u003ctd\u003e250 V AC (1 min)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eContact Resistance\u003c\/th\u003e\n \u003ctd\u003e\u0026lt; 100 mΩ\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eInsulation Resistance\u003c\/th\u003e\n \u003ctd\u003e\u0026gt; 100 MΩ\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eBounce Time\u003c\/th\u003e\n \u003ctd\u003e\u0026lt; 5 ms\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth\u003eOperating Temperature\u003c\/th\u003e\n \u003ctd\u003e-20°C to 70°C\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eElectrical \u0026amp; Mechanical Options\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eSwitch Height Options: 4.3 mm, 7.3 mm, 8.5 mm, 12 mm (other heights available upon request)\u003c\/li\u003e\n \u003cli\u003eActuator Style: Round, Snap Fit (J), or None\u003c\/li\u003e\n \u003cli\u003eActuator Force: 180 g (M), 250 g (K)\u003c\/li\u003e\n \u003cli\u003eTermination \u0026amp; Packaging: THT in bags, SMT in tape \u0026amp; reel (various parts per reel)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackaging \u0026amp; Soldering\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eSoldering Style\u003c\/th\u003e\n \u003cth\u003eHeight\u003c\/th\u003e\n \u003cth\u003ePackaging\u003c\/th\u003e\n \u003cth\u003eParts per Packaging\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eTHT\u003c\/td\u003e\n \u003ctd\u003eAll heights\u003c\/td\u003e\n \u003ctd\u003ePlastic bag\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e4.3 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e900\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e4.3 mm with pegs\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e600\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e7.3 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e7.3 mm with pegs\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e8.5 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e500\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e8.5 mm with pegs\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e400\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSMT\u003c\/td\u003e\n \u003ctd\u003e12 mm\u003c\/td\u003e\n \u003ctd\u003eTape \u0026amp; reel\u003c\/td\u003e\n \u003ctd\u003e250\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDimensions \u0026amp; Layout\u003c\/h3\u003e\n\u003cp\u003eReel dimensions conform to EIA 481B with an external diameter of 330 mm.\u003c\/p\u003e\n\u003cp\u003eRecommended PCB layouts are provided for SMT versions with round and square snap fit actuators.\u003c\/p\u003e\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePart Number: PTS125SK43SMTR2LFS\u003c\/li\u003e\n \u003cli\u003eManufacturer: LITTELFUSE \/ C\u0026amp;K COMPONENTS\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: CN\u003c\/li\u003e\n \u003cli\u003eUOM: EA\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003ePackage Type: TAPE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor detailed specifications, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-ck\/ck-pts125sk43smtr2lfs.pdf\" target=\"_blank\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The specifications listed above are for standard options. For custom configurations, please consult the Customer Service Center.\u003c\/p\u003e\n\u003cp\u003eDatasheet was not processed, please search the internet for the part number for more details.\u003c\/p\u003e\u003cbr\u003e"}
