Thermal Protetors type CZ1 / SZ1; 1.6 – 7.5 A

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CZ1, SZ1 are current-sensitive switches, automatically resetting, with connecting cables, with or without epoxy

CZ1 is not insulated

SZ1 is insulated with a Mylar®-Nomex® cap

 

Ideal for installation on windings of electric motors or transformers or ballasts

Art.-Nr.
CZ1
SZ1

 

Switch type: NC contact CZ1 NC contact 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 licenses
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.

 

Note

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.