| Switching type: | Normally closed contact CZ1 | Opener SZ1 | ||
| resetting, defined current sensitive | ||||
| Insulated: Insulation cap | no | yes | ||
| Temperature | ||||
| Nominal switching temperature (NST), in 5 K steps | [°C] | 70 – 160 | ||
| Tolerance range -Standard- | Tol[ [K] | ± 5 | ||
| Switch-back temperature (RST below NST) (defined RST on customer request) | UL VDE | [ [K] [ °C] | -35 ± 15
≥ 35 |
|
| Tension | ||||
| max. Operating voltage range up to … | 500 V AC / 14 V DC | |||
| Rated voltage AC | [V] | 250 (VDE) 50 Hz, 277 (UL) | ||
| Current/switching cycles | ||||
| Rated current AC – cos j = 1.0 | [A] / [n] | 2,0 / 3‘000 | ||
| Rated current AC – cos j = 0.6 | [A] / [n] | 1,6 / 3‘000 | ||
| Max. Switching current AC | [A] / [n] | 4,0 / 3‘000 | ||
| Rated voltage DC | [V] | 12 | ||
| Max. Switching current DC | [A] / [n] | on request | ||
| Other data | ||||
| Series resistors for setting the current sensitivity | from 0.12 Ω to 70 Ω | |||
| High-voltage resistance | [kV] | — | 2 | |
| Total bounce time | [ms] | < 1 | ||
| Contact resistance (according to MIL-STD R5757) | [mΩ] | £ 50 | ||
| Vibration resistance 10 … 60 Hz | [m/s2] | 100 | ||
| Suitable for installation in protection class | I | I + II | ||
| Impregnation resistance | suitable | |||
| Available licences | ||||
| please specify | IEC, ENEC, VDE, UL (NST 70°C – 130°C) | |||
| Dimensions (standard) | ||||
| T | ||||
| Diameter | Ø d [mm] | 9,0 | 9,4 | |
| Overall height (with standard connection) | h [mm] | from 4,5 | from 4,9 | |
| Length of insulation cap | l [mm] | — | 18 | |
| Standard connection | Stranded wire: | 0,25 mm2/AWG 22 | ||
| Functional circuit diagram | ||||
| The series resistor is used to adjust the current sensitivity, as its heating causes the switch to trip earlier. | ||||
Temperature limiter type CZ1 / SZ1
CZ1, SZ1 are current-sensitive switches, automatically resetting, with connecting cables, with or without epoxy
CZ1 is not isolated
SZ1 is insulated with a Mylar®-Nomex® cap
- Ideal for installation on windings of electric motors or transformers or ballasts
