Stego STO 011 / STS 011 series compact thermostats are two state regulators with small hysteresis and high switching capacity. The setting thumbwheel has an anti frost assurance whilst the housing ensures an optimized air circulation around the bimetal. The STO 011 (stock no. 743-1296) thermostat (normally closed) is a contact breaker for regulating heaters. The STS 011 (stock no. 743-1290) thermostat (normally open) is a contact maker for regulation of filter fans and heat exchangers or for switching signal devices when temperature limits have been exceeded.

Switch temperature difference: 4K (±3K tolerance)
Sensor element: thermostatic bimetal
Contact type: snap-action contact
Service life: <100,000 cycles
Max. switching capacity: 250 V ac, 10 (2) A; 120 V ac, 15 (2) A; 30 W dc at 24V dc to 72 V dc
Max. inrush current: 16 A ac for 10 sec.
Connection: 2-pole terminal for 2.5mm² (AWG 13), torque 1Nm max.
Mounting: clip for 35mm DIN rail, EN 60715
Casing: plastic according to UL94 V-0, light grey
Dimensions: 70 x 33 x 42mm
Weight: approx. 50g
Fitting position: variable
Operating / Storage temperature: -45 °C to +80 °C (-49 to +176°F)
Operating / Storage humidity: max. 90% RH (non-condensing)
Protection type: IP20