Syntemp S01 and S06


Series S01 and S06 thermal cut-offs are moulded,
permanently operating bimetal release switches which
interrupt the current flow once the nominal temperature
has been reached (normally closed contact). Opening/ closing combination also possible. 


Permanent operation with immediate reaction once the
switching temperature has been reached is ensured due
to the unique free-moving and self-aligning construction of
the bimetal disc in the thermal cut-off.
The thermal cut-offs are available as a single component
and in a twin or triplet version.

Further advantages due to the bimetal perforated discs:
-high spring resistance with small spring travel
-improved space utilisation

-very high mechanical strength

-excellent long-term stability


The S01 and S06 thermal cut-offs are used in electric motors and transformers.


VDE EN 60 730-2-9,
UL/CSA 2111, File Nr. E54236
ENEC acc. to EN 60730
RoHS compliant acc. to 2011/EU

Delivery format

Nominal switching temperature in 5 °C-steps of 60 to 200 °C as standard, further temperatures on request.
Version: 01 available with (S01) or without (C01) insulation cap, resin impregnated or bare.
Version: 06 availabel with (S06) or without (C06) insulation cap, resin impregnated or bare.
Standard cable length 300 mm, other lengths on request.



Technical data

  Unit S01/S02 S06/S08
Contact resistance < 50 mΩ < 50 mΩ
High voltage strength kV 2 kV 2 kV
Standard connection cable mm² AWG 22 AWG 18
Pressure resistance of the housing N 450 N 600 N
For devices of protection class   I + II I + II
Diameter (with/without insulation cap) mm 9.4 9.4
Installation height of the housing (with/without insulation cap) mm from 4.7 from 6.7
Insulation cap length mm 15 mm 16 mm
Brush shunt length (L1 and L2)   300 mm 300 mm
Brush shunt length (L1 and L3)   300 mm 300 mm
Brush shunt length (L1 and L4)   300 mm 300 mm
  Unit S01/S02 S06/S08
Switch properties
Schaltart   opening contact /closing contact opening contact /closing contact
Nominal switching temperatures   60 - 200 °C 70 - 200 °C
Tolerance   ± 5 K ± 5 K
Switch-back temperature range   depends on NST depends on NST
Operating voltage AC/DC   up to 500 V~ up to 500 V~
Rated voltage   250 V (VDE) / 277 V (UL) 250 V (VDE) / 277 V (UL)
Nominal current IN cos φ=1,0   2.5 A / 10,000 10 A / 10,000; 25 A / 2,000
Nominal current IN cos φ=0,6   1.6 A / 10,000 6.3 A / 10,000
Nominal current IN cos φ=0.4-0.5 / cycles of operation   1.8 A / 10,000  
Total bouncing time   < 1 ms < 1 ms
SYNTEMP® is a registered Trademark of Synflex