Thermostats | McMaster-Carr

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	Voltage Voltage

18 to 30V AC

20 to 30V AC

24 to 250V AC

24 to 277V AC

90 to 264V AC

100 to 240V AC

120 to 240V AC

120 to 277V AC

	For Use With For Use With

Air Conditioners

	Thermostat Type Thermostat Type

Nonprogrammable

Wi-Fi Enabled
Programmable

	For System Type For System Type

	Control Type Control Type

	Color Color

	White
	Clear
	Beige

	Electrical Connection Type Electrical Connection Type

Screw Terminals

	Sensor Type Sensor Type

	For Use Outdoors For Use Outdoors

	Current Current

10 A @ 120 V AC

16 A @ 120 V AC

16 A @ 240 V AC

	Switch Type Switch Type

Surface Contact

	Maximum Temperature Setting Maximum Temperature Setting

	Material Material

	For System Efficiency For System Efficiency

	Overall Depth Overall Depth

	Overall Height Overall Height

	Minimum Temperature Minimum Temperature

0Â° F or less

1Â° to 49Â° F

50Â° to 99Â° F

100Â° to 199Â° F

200Â° F or greater

	Display Type Display Type

	Industry Designation Industry Designation

Double Pole, Single Throw
(DPST)

Single Pole, Single Throw
(SPST)

Double Throw (SPDT)

Triple Pole, Single Throw
(3PST)

	Maximum Housing Temperature Maximum Housing Temperature

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) or 1
On (Normally Closed)

1 On (Normally Closed)

2 On (Normally Closed)

3 Off (Normally Open)

3 On (Normally Closed)

	Electrical Phase Electrical Phase

	Power Source Power Source

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135 Products

Thermostats and Guards

Low-Voltage Thermostats

Low-Voltage Thermostats

Control low-voltage heaters and air conditioners.

Line-Voltage Thermostats

Regulate line-voltage heaters and air conditioners.

Thermostat Guards

Thermostat Guards

Restrict access and protect thermostats from damage.

Air-Powered Thermostats

Air-Powered Thermostats

Also known as two-pipe thermostats, these thermostats use compressed air for power. Use when electricity is not practical or available for controlling your heating and cooling equipment.

Other Thermostats

HVAC Damper Actuators

Automatically adjust dampers to regulate airflow.

Temperature Control

Use with immersion heaters, cartridge heaters, heat cable, and other heating equipment.

Thermostats for
Electric Water Heaters

Equipment-Cooling Fan Thermostats

Equipment-Cooling Fan Thermostats

These thermostats mount on a 35 mm DIN rail inside an enclosure and connect to your fan. Set the thermostats to switch your fan on only when needed.

Drinking Fountain Replacement Parts

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)