STEGO Thermostat switch contact breaker KTO 111

THERMOSTAT SWITCH NC normally closed

KTO 111
The mechanical thermostat opens when the temperature rises and is used for regulating heaters or switching signal devices in the event that the temperature limit is exceeded. Supply lines are prevented from coming loose by push-in terminals.
  • Supply lines fixed in place by push-in terminals
  • Saves time as no tools are required for connection
  • Easy to adjust due to large adjustment dial
  • Optimised air inlets
  • Can be used at altitudes of up to 5,000 m

Overview Technical Data

7 K (±4 K tolerance)
thermostatic bimetal
snap-action contact
100,000 cycles verified
AC 250 V, 50-60 Hz
AC 16 A for 10 s
2 Push-In clamps
rigid wire 2.5 mm² (AWG 14)
stranded wire1 1.5 mm² (AWG 16)
clip for 35 mm DIN rail, EN 60715
plastic according to UL94 V-0, light grey
60 x 33 x 41 mm
~ 40 g
-45 to +80 °C (-49 to +176 °F)
< 90 % RH (non-condensing)
IP20 / II
II: up to 5,000 m; III: up to 2,000 m

1 Stripped length of rigid wire: 10 to 12 mm. When connecting with wires, wire end ferrules must be used (square or trapezoid crimp). Length of wire end ferrule: 10 mm or 12 mm.

Important note: The contact system of the regulator is subjected to environmental influences, thus the contact resistance may change. This can lead to a voltage drop and/or self-heating of the contacts.

Product Variants

Notice: Switching current: The level of switching current has an influence on the tolerance accuracy

Summary of your request

Art. No. Connection casing Casing Productname Series Heating element Heater body Model Axial fan Operating voltage Operating voltage
Operating voltage
Voltage type Frequency Heating capacity Inrush current
Surface temperature Rec. pre-fuse
T (time-delay)
Connection Connection PE Air outlet temperature Switch-off temperature Switch-off temperature 2 Switch-on temperature Switch-on temperature 2 Drilling template Operating temperature Flow rate,
free flow
Flow rate,
with filter
Setting range Setting range 2 Current
Nominal current
of socket
Average noise level Enclosure cut-out Enclosure cut-out Storage temperature Storage humidity Ambient temperature Operating humidity Speed Switching capacity
Switching current
Load resistance (external) External Sensor Measuring range Measuring range 2 Note Note 2 Note 3 Note 4 Reaction time Contact type Service life Operation indicator Control contact -
Signal current
Electrical protection Switch Socket Material Material sealing Air permeability Mounting Air intake/Air outlet Filter material Measuring signal Switch temperature
Lamp type Luminous flux Light colour Length / Depth Width Height Diameter Installation depth Fitting position Mounting frame Weight Sensor element Protection class Protection type Protection type UL VDE UL EAC METRO ATEX Ex Protection type Gases Ex Protection type Mine applications Ex Protection type Dusts Temperature class Temperature safety
Accessory Accessory 2 Accessory 3 Accessory 4 Art. No. Accessory Art. No. Accessory 2 Art. No. Accessory 3 Art. No. Accessory 4 Catalogue Article CAD

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STEGO Elektrotechnik GmbH
Kolpingstraße 21
74523 Schwäbisch Hall