{"id":2758,"date":"2024-02-01T10:21:52","date_gmt":"2024-02-01T09:21:52","guid":{"rendered":"https:\/\/schupp.ch\/p\/temperature-limiter-type-ck1-sk1-lk1-nk1\/"},"modified":"2025-11-28T16:01:47","modified_gmt":"2025-11-28T15:01:47","slug":"temperature-limiter-type-ck1-sk1-lk1-nk1","status":"publish","type":"product","link":"https:\/\/schupp.ch\/en\/p\/temperature-limiter-type-ck1-sk1-lk1-nk1\/","title":{"rendered":"Thermal Protectors type CK1 \/ SK1 \/ LK1 \/ NK1; 1.6 – 7.5 A"},"content":{"rendered":"\n\n\n\n
\n
CK1<\/h5>\n<\/td>\n
\n
SK1<\/h5>\n<\/td>\n
\n
LK1<\/h5>\n<\/td>\n
\n
NK1<\/h5>\n<\/td>\n<\/tr>\n
\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Switching type<\/strong><\/td>\nNC contact CK1 resetting<\/strong><\/td>\nNC contact SK1 resetting<\/strong><\/td>\nNC contact LK1 resetting<\/strong><\/td>\nNC contact NK1 resetting<\/strong><\/td>\n<\/tr>\n
Insulated: Housing \/ insulating cap<\/td>\nYes<\/td>\nYes<\/td>\nno<\/td>\nno<\/td>\n<\/tr>\n
Partially insulated: Plastic cap<\/td>\nno<\/td>\nno<\/td>\nno<\/td>\nyes<\/td>\n<\/tr>\n
Temperature<\/strong><\/td>\n<\/tr>\n
Reverse Switch Temperature (NST), [\u00b0C], in 5 K steps<\/td>\n60 – 200<\/td>\n<\/tr>\n
Tolerance range -Standard- Tol [ [K]<\/td>\n\u00b1 5<\/td>\n<\/tr>\n
Reverse Switch Temperature (RST below NST) UL [K]
\nSwitch-back temperature (RST below NST) VDE [\u00b0C]<\/td>\n		-35 \u00b1 15
\n\u2265 35<\/td>\n<\/tr>\n
Tension<\/strong><\/td>\n<\/tr>\n
max. operating voltage range up to …<\/td>\n500 V DC \/ 14 V DC<\/td>\n<\/tr>\n
Rated voltage AC [VAC]<\/td>\n250 ( VDE), 277 (UL)<\/td>\n<\/tr>\n
Current\/switching cycles<\/strong><\/td>\n<\/tr>\n
Rated current AC – cos \u03c6 = 1.0 [A] \/ [n]<\/td>\n2,5 <\/strong>\/ 10’000<\/td>\n<\/tr>\n
Rated current AC – cos \u03c6 = 0.6 [A] \/ [n]<\/td>\n1,6 <\/strong>\/ 10’000<\/td>\n<\/tr>\n
max. Switching current – cos \u03c6 = 1.0 [A] \/ [n]<\/td>\n6,3 \/ <\/strong>3’000 7,5 \/ <\/strong>300<\/td>\n<\/tr>\n
Rated current cos \u03c6 = 0.4 [A] \/ [n]<\/td>\n1,8 \/ <\/strong>10’000<\/td>\n<\/tr>\n
max. Switching current – cos \u03c6 = 0.4 [A] \/ [n]<\/td>\n7,2 \/ <\/strong>1’000<\/td>\n<\/tr>\n
Rated voltage DC [V]<\/td>\n12<\/td>\n<\/tr>\n
Max. Switching current DC [A] \/ [n]<\/td>\n40,0 <\/strong>\/ 10’000<\/td>\n<\/tr>\n
Additional specifications<\/strong><\/td>\n<\/tr>\n
High-voltage strength [kV]<\/td>\n—<\/td>\n2<\/td>\n2<\/td>\n—<\/td>\n<\/tr>\n
Total bounce time [ms]<\/td>\n< 1<\/td>\n<\/tr>\n
Contact resistance (according to MIL-STD R5757) [m\u03a9]<\/td>\n50<\/td>\n<\/tr>\n
Vibration resistance 10 … 60 Hz [m\/s2<\/sup>]<\/td>\n100<\/td>\n<\/tr>\n
Compressive strength of the switch housing [N]<\/td>\n450<\/td>\n<\/tr>\n
Suitable for installation in protection class<\/td>\nI<\/td>\nI + II<\/td>\nI + II<\/td>\nI<\/td>\n<\/tr>\n
Impregnation resistance<\/td>\nsuitable<\/td>\n<\/tr>\n
Available Licenses and Approvals<\/strong><\/td>\n<\/tr>\n
please specify<\/td>\nIEC, ENEC, VDE, UL, CSA, CQC<\/td>\nIEC, ENEC, VDE, UL, CQC<\/td>\n<\/tr>\n
Dimensions (standard)<\/strong><\/td>\n<\/tr>\n
Diameter \u00d8 d [mm]<\/td>\n10,0<\/td>\n10,0<\/td>\n10,0<\/td>\n10,0<\/td>\n<\/tr>\n
Overall height h [mm]<\/td>\nfrom 3.9<\/td>\nfrom 4.3<\/td>\nfrom 7.0<\/td>\n3,4<\/td>\n<\/tr>\n
Length of connection pin l [mm]<\/td>\n—<\/td>\n15,0<\/td>\n—<\/td>\n14,0 \/ 20,0<\/td>\n<\/tr>\n
Thread (size x length ) [M x mm]<\/td>\n—<\/td>\n—<\/td>\nM4 x 5<\/td>\n—<\/td>\n<\/tr>\n
Width across flats \/ max. Torque [mm \/ Nm]<\/td>\n<\/td>\n<\/td>\n10,0 \/ 2<\/td>\n<\/td>\n<\/tr>\n
Standard stranded wire connection:<\/td>\n0.25 mm2\/AWG 22<\/td>\nConnection wire d = 0.5 mm<\/td>\n<\/tr>\n
Characteristics of current dependence<\/strong><\/td>\n<\/tr>\n
The special feature of the 01 and 02 series is that they are temperature-sensitive switches. In their rated operation (rated current), they exhibit very low self-heating due to the current. Therefore, a switching point reduction takes place at most within the n<\/strong>ominal switching t<\/strong>emperature t<\/strong>olerance.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n
\n
CK1<\/strong><\/h5>\n<\/td>\n
\n
SK1<\/strong><\/h5>\n<\/td>\n
\n
LK1<\/strong><\/h5>\n<\/td>\n
\n
NK1<\/strong><\/h5>\n<\/td>\n<\/tr>\n
\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Note<\/strong><\/p>\n

The data and information provided are based on tests and test series. They are intended as a guide, which is why there may be deviations for individual applications and uses. The suitability in a specific application must be checked by the user in each individual case.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

 <\/p>\n

The types CK1<\/strong>, SK1<\/strong>, LK1 and NK1<\/strong> are automatically resetting switches with or without Expoxy<\/h5>\n
<\/h5>\n
CK1<\/strong>, SK1, LK1 <\/strong>with connecting cables<\/h5>\n
<\/h5>\n
SK1 <\/strong>insulated with Mylar\u00ae-Nomex\u00ae cap<\/h5>\n
<\/h5>\n
LK1 <\/strong>with screw-on housing<\/h5>\n
<\/h5>\n
NK1<\/strong> with connecting wires, partially insulated with plastic cap<\/h5>\n
<\/h5>\n
<\/h5>\n
Possible applications in control cabinets, on motor housings or heat sinks, printed circuit boards<\/h5>\n

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