Stego STO 011, STS 011 Catalog Page

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COMPACT THUMBWHEEL THERMOSTAT

18.02.2020 | Specifications are subject to change without notice. Suitability of this product for its intended use and any associated risks must be determined by the end customer/buyer in its final application.

STO 011 / STS 011

REGULATING

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Convenient minimum setpoint
symbol on the NC thermostat to assure
enclosure temperature remains above
freezing.

> Adjustable thumbwheel setting
> Compact design

> High switching capacity
> DIN rail mountable

> Small hysteresis

The ST 011 thermostat is an SPST regulator with small hysteresis. The housing design ensures optimized air
circulation around the sensor element.

Thermostat NC (normally closed): Thermostat opens on temperature rise (red thumbwheel) – for regulating

heaters or for switching signal devices when temperature has fallen below the minimum value.

Thermostat NO (normally open): Thermostat closes on temperature rise (blue thumbwheel) – for regulating filter

fans, heat exchangers, cooling devices or for switching signal devices when temperature limit has been exceeded.

TECHNICAL DATA

Switching difference 7 °F (4 K) ±5.4 °F (3 K) tolerance

Sensor element thermostatic bimetal

Contact type snap-action contact

Service life > 100,000 cycles

Max. switching capacity 15 A resistive / 2 A inductive @ AC 120 V

Max. inrush current AC 16 A for 10 sec.

Connection 2-pole terminal, clamping torque 1 Nm max.:

Housing plastic, UL 94V-0, light grey

Mounting clip for 35 mm DIN rail, EN 60715

Mounting position vertical

Operating / Storage temperature -49 to +176 °F (-45 to +80 °C)

Operating / Storage humidity max. 90 % RH (non-condensing)

Dimensions 2.76 x 1.3 x 1.65" (70 x 33 x 42 mm)

Weight approx. 1.8 oz. (50 g)

Protection type IP20

Approvals UL File No. E164102, VDE, 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.

10 A resistive / 2 A inductive @ AC 250 V
DC 30 W (DC 24 – 72 V)

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solid/stranded

wire – AWG 14 max. (2.5 mm²)

NC (red) NC (blue)

Enclosure heater
Filter fan, cooling equipment, signal device

Part No. (NC) Part No. (NO) Setting range

01115.9-00 01116.9-00 +32 to +140 °F

01115.0-00 01116.0-00 0 to +60 °C

Wiring
examples

HeaterThermostat

STO 011

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Thermostat

STS 011

e.g. Fan Thermostat

STS 011

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e.g. Signal Device
min: 24 V; 20 mA