Safety thermal cut-out 89.00


For heat generators with tempertures up to 350°C


Electro-mechanical safety thermal cut-out (STB) with capillary sensor approved to DIN EN 14597 and EN60730-1/2-9
  • If cut-out temperature is exceeded, circuit switches to OFFor changeover and stays in thisposition
  • Fail safe design: Expansion liquid loss results in opening of contact C-1
  • Manuell resetting after sensing element has cooled by at least 10K
  • Single-pole micro switch with on/off or change-over switch
  • Time factor of sensing element better than DIN EN 14597
  • Temperature compensated switching head
  • Operation type 2.B.H.K.L.P (EN60730)
  • RoHS-conform
  • DIN CERTCO Registernumber: TR1107

Technical data

Switching system

Endurance class 1.000 operations
Nominal voltage/current
250 V AC
16 (3,5) A
4 (0.6) A
Protection against electric shock for incorporation in class I equipment I
Protection standard of housing IP00 (EN 60 529
Overvoltage category II

Range of application

Cut-out temperature
fixed adjustmen
60 ... 350°C
110...85°C, 120...95°C,
Max. sensing element temp taus + 25K
Ambiant temperature at switching head max. 85 °C (T85)
Storage and transport temperature -25...+60 °C


Calibrated for ambiant temperature at switching head
23°C or 50°C (Tu23/Tu50 according to DIN EN 14597)
Calibration tolerance - 4 K, max 6%
Drift 2 K
Time factor in water / in oil < 45 s / < 60 s


Capillary und sensing element copper / stainless steel
Capillary length 500 ... 3500 mm
Phial forms
round, diameter
half-, third-, quater circle

3, 4, 5, 6, 6.5, 7, 8,

9.5, 10, 11, 12 mm

Diaphragm stainless steel
Connection and earthing terminals Tab terminal A6.3x0.8 according to DIN46244

Photos of the product

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