Temperature limiter type CK1 / SK1 / LK1 / NK1; 1.6 – 7.5 A

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CK1, SK1, LK1 and NK1 are automatically resetting switches with or without Expoxy

CK1, SK1, LK1 with connection cables SK1 with Mylar®-Nomex® cap insulated LK1 with screw-on housing

NK1 with connecting wires, partially insulated with plastic cap

 

Possible applications in switch cabinets, on motor housings or heat sinks, printed circuit boards

Art.-Nr.
CK1
SK1
LK1
NK1

 

Switching type NC contact CK1 resetting NC contact SK1 resetting NC contact LK1 resetting NC contact NK1 resetting
Insulated: Housing / insulating cap Yes Yes no no
Partially insulated: Plastic cap no no no yes
Temperature
Nominal switching temperature (NST), [°C]
in 5 K steps
60 – 200
Tolerance range -Standard- Tol [ [K] ± 5
Switch-back temperature (RST below NST) UL [K]

VDE [°C]

-35 ± 15

≥ 35

Tension
max. Operating voltage range up to … 500 V DC / 14 V DC
Rated voltage AC [VAC] 250 ( VDE), 277 (UL)
Current/switching cycles
Rated current AC – cos j = 1.0 [A] / [n] 2,5 / 10’000
Rated current AC – cos j = 0.6 [A] / [n] 1,6 / 10’000
max. Switching current – cos j = 1.0 [A] / [n] 6.3 / 3,000

7.5 / 300

Rated current- cos j = 0.4 [A] / [n] 1,8 / 10’000
max. Switching current – cos j = 0.4 [A] / [n] 7,2 / 1‘000
Rated voltage DC [V] 12
Max. Switching current DC [A] / [n] 40,0 / 10‘000
Other data
High-voltage resistance [kV] 2 2
Total bounce time [ms] < 1
Contact resistance (according to MIL-STD R5757) [mΩ] £ 50
Vibration resistance 10 … 60 Hz [m/s2] 100
Compressive strength of the switch housing [N] 450
Suitable for installation in protection class I I + II I + II I
Impregnation resistance suitable
Available licences
please specify IEC, ENEC, VDE, UL, CSA, CQC IEC, ENEC, VDE, UL, CQC
Dimensions (standard)
Diameter Ø d [mm] 10,0 10,0 10,0 10,0
Overall height h [mm] from 3,9 from 4,3 from 7,0 3,4
Length of the connection pin l [mm] 15,0 14,0 / 20,0
Thread (size x length) [M x mm] M4 x 5
Width across flats / max. Torque [mm / Nm] 10,0 / 2
Standard stranded wire connection: 0.25 mm2/AWG 22 Connection wire d = 0.5 mm
Current dependency charateristics
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 nominal switching temperature tolerance.

 

Hint

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 for a specific application must be checked by the user in each individual case. We will of course be happy to advise you.