- Thumbwheel setting dial
- Small hysteresis
- High switching capacity
- Anti frost assurance
- Optimized housing for better air flow
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.
|Switch temperature difference||4K (±3K tolerance)|
|Sensor element||thermostatic bimetal|
|Contact type||snap-action contact|
|Service life||> 100,000 cycles|
|Max. switching capacity||250VAC, 10 (2) A / 120VAC, 15 (2) A|
DC 30W at 24VDC to 72VDC
|Max. inrush current||AC 16A for 10 sec.|
|Connection||2-pole terminal, clamping torque 1Nm max.:|
rigid/stranded1 wire 2.5mm² (AWG 14)
|Mounting||clip for 35mm DIN rail, EN 60715|
|Casing||plastic according to UL94V-0, light grey|
|Dimensions||70 x 33 x 42mm|
|Operating/Storage temperature||-45 to +80°C (-49 to +176°F)|
|Operating/Storage humidity||max. 90% RH (non-condensing)|
|Approvals||VDE, UL File No. E164102, EAC|
¹ When connecting with stranded wires, wire end ferrules must be used.
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.
Anti frost assurance
The anti frost assurance is a symbol on the setting scale of the NC thermostat
(STO 011) at +11°C. This setting assures closing of the switching contact before 0°C.
|Setting range||Art. No. Contact breaker (NC)||Art. No. Contact maker (NO)|
|0 to +60°C||01115.0-00||01116.0-00|
|+32 to +140°F||01115.9-00||01116.9-00|