SynTemp® – Temperature Monitoring SynTemp® S01/S02 or S06/S08

Series S01 or 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). Closing combination also possible (S02 or S08).

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:

  • excellent long-term stability
  • improved space utilisation
  • high mechanical strength
  • excellent long-term stability
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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

Delivery forms

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 out of Mylar® / Nomex®, Epoxy resin impregnated or bare.

Version: 06 available with (S06) or without (C06) insulation cap, basically Epoxy resin impregnated.

Standard cable length 300 mm, other lengths on request.

Technical data

Switch properties
Property Unit of measure S01/S02 S06/S08
Switch type opening / closing contact opening / closing contact
Nominal switching temperatures °C 60- 200 70-200
Reverse switch temperature Depending on NST Depending on NST
Total bouncing time ms <1 <1
Operating voltage AC/DC V up to 500 / 28 up to 500 / 28
Rated voltage V 250 (VDE) / 277 (UL) 250 (VDE) / 277 (UL)
Rated current AC cos φ=0.6 A 1.6 / 10,000 cycles 6.3 /10,000 cycles
Rated current AC cos φ=1.0 A 2.5 / 10,000 cycles 10 / 10,000 cycles
Max. switching current AC cos φ=1.0 A 25 / 100 cycles 25 / 2,000 cycles
Tolerance °C ± 5 ± 5
Property Unit of measure S01/S02 S06/S08
Contact resistance <50 <50
High-voltage resistance kV 2 2
Standard connection lead wire mm² 0.25 / AWG 22 0.75 / AWG 18
For devices in 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
Length of insulation cap mm 15 16
Pressure resistance of the housing N 450 600