| Switching type | Normally closed 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 |
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| 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 |
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| 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 | Connecting 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. | ||||
Temperature limiter type CK1 / SK1 / LK1 / NK1
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
