• black icon of a bullhorn 30 years industry experience
  • black icon of three cubes Over 8,000 products in stock
  • Black icon of a clock Order by 16:00 and receive the next working day


Thermostat - STO 011/STS 011


  • Thumbwheel setting dial
  • Small hysteresis
  • High switching capacity
  • Anti frost assurance
  • Optimized housing for better air flow

Product description

The mechanical thermostat is a two state regulator with small hysteresis. The setting wheel has an anti frost assurance. The housing ensures an optimized air circulation around the bimetal.


STO 011: Thermostat (NC); contact breaker for regulating heaters. The contact opens when temperature is rising.


STS 011: Thermostat (NO); contact maker for regulating of filter fans and heat exchangers or for switching signal devices when temperature limit has been exceeded. The contact closes when temperature is rising.

Part numbers

Parts Price Control range temperature from Control range temperature to Control range temperature from Control range temperature to
0 °C 60 °C
0 °C 60 °C
32 °F 140 °F
32 °F 140 °F


STO 011 Thermostat, 0…60°C, normally closed

Technical data

General data

Control range temperature from 0 °C
Control range temperature to 60 °C
Tolerance switch off ±3K
Tolerance for switch on ±3K
Hysteresis temperature 4K
Mounting DIN-rail 35mm, quick mount

Rated operating conditions

Inrush max 16 A
Breaking capacity 250 VAC, 10 (2) A / 120 VAC, 15 (2) A. DC: 30W @ 24 VDC, up to 72 VDC
Contact resistance <10 mΩ
Electrical lifetime > 100 000 operations
Connection type 2-pole rigid 2,5 mm² (AWG 14) or stranded 1,5 mm² (AWG 16). Torque 0,8 Nm.
Humidity <90 % RH (non-condensing)
Operational Temperature -45°C ... +80°C
Storage temperature -45°C ... +80°C
Life span >1 000 000 operations


Height 70 mm
Width 33 mm
Depth 42 mm
Weight 0,05 kg
Material plastic housing Plastic

Safety & approvals

Plastic cover Light grey plastic, UL94 V-0
IP class IP20
Approvals CE, cULus, EAC, RoHS, UL E164102, VDE
Country of origin Germany


Contact us

If you need any help, you can contact us in one of the following ways:

0116 284 9900

Send an e-mail

Use live chat