	Maximum Voltage Maximum Voltage

24 to 75V DC

	Maximum Actuation Point Maximum Actuation Point

60° F

75° F

105° F

200° F

	Switch Starting Position Switch Starting Position

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

1 Off (Normally Open)

1 On (Normally Closed)

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

2 Off (Normally Open)

	Minimum Actuation Point Minimum Actuation Point

	Current Current

16A

25A

	Number of Circuits Controlled Number of Circuits Controlled

	Specifications Met Specifications Met

	Scale Scale

Fahrenheit

Celsius

	Industry Designation Industry Designation

SPDT

Single Pole, Single Throw
(SPST)

	Wire Connection Type Wire Connection Type

Wire Leads

Screw-Clamp Terminals

	Environmental Rating Environmental Rating

NEC Class I Division 2
Groups A, B, C, D

IP20

	Maximum Housing Temperature Maximum Housing Temperature

175° F

220° F

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Number of Actuation Points Number of Actuation Points

	For Use With For Use With

Air Conditioners

Fans

Heaters

	Application Application

Cooling

Heating

	Temperature Setting Temperature Setting

	Housing Color Housing Color

	White
	Blue
	Red

	Overall Width Overall Width

1 5/16"

2 1/2"

	Temperature Difference Temperature Difference

18° F

10° C

	Thermostat Switch Starting Position Thermostat Switch Starting Position

Normally Open

Normally Closed

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15 Products

Surface-Mount Temperature Switches

Often used to control heat cable output, these switches mount on surfaces to maintain the temperature within a preset range. All are single pole, double throw (SPDT). They turn equipment on when the surface temperature falls below the minimum actuation point and turn equipment off when the surface temperature rises above the maximum actuation point. All are FM approved for use in Class I, Division 2, Groups A, B, C, and D hazardous locations with flammable gases, such as refineries and chemical plants.

Actuation Point						Mounting Hole
Min., °F	Max., °F	Voltage Range (Electrical Phase)	Current	Ht.	Wd.	No. of	Dia.	Environmental Rating		Each
45°	60°	120V AC to 277V AC (Single)	25A	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	0000000	000000
60°	75°	120V AC to 277V AC (Single)	25A	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	0000000	00000
90°	105°	120V AC to 277V AC (Single)	25A	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	0000000	00000
185°	200°	120V AC to 277V AC (Single)	25A	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	0000000	00000

Enclosure Thermostats

Nonadjustable Thermostat

Control a single heating or cooling device in your enclosure to keep electronics at a safe operating temperature. Clip them on to a DIN rail and connect them to your heater, fan, or air conditioner.

All these thermostats meet American, Canadian, or European safety standards. They have an IP20 rating—to prevent shocks, fingers won’t fit inside. They also meet UL 94 V-0, so they self-extinguish within 10 seconds if they catch fire and won’t spread the fire by dripping.

Nonadjustable thermostats have a fixed temperature setting to prevent tampering or accidental changes.

These thermostats keep the air in your enclosure within a set range. Temperature setting is the high end of the range for both heating and cooling thermostats. Heating thermostats are normally closed—when the air in your enclosure reaches the temperature setting, the thermostat will turn the heater off. Cooling thermostats are normally open, so they’ll switch your fan or air conditioner on when the air in your enclosure reaches the temperature setting.

Temperature difference is the difference between the temperature when the thermostat turns your device on and when it turns off. For a heater thermostat with a temperature setting of 50° and an 18° temperature difference, the thermostat will switch your heater on when the temperature goes below 32° and off once the temperature reaches 50°. Thermostats with a lower temperature difference maintain a narrower range of temperatures, but they use more power because they switch on and off more frequently.

Temperature						Overall
Setting	Difference	Tolerance	Voltage	Current, A	For DIN Rail Ht., mm	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
For Cooling
Nonadjustable
95° F/35° C	18° F/10° C	±11° F/±6° C	120V AC/240V AC 24V DC to 75V DC	16	35	1 7/8"	1 5/16"	1 5/16"	IP20	CE Marked, UL 94 V-0, UL Recognized Component, C-UL Recognized Component, VDE Certified	0000000	000000
122° F/50° C	18° F/10° C	±11° F/±6° C	120V AC/240V AC 24V DC to 75V DC	16	35	1 7/8"	1 5/16"	1 5/16"	IP20	CE Marked, UL 94 V-0, UL Recognized Component, C-UL Recognized Component, VDE Certified	0000000	00000
140° F/60° C	18° F/10° C	±12.6° F/±7° C	120V AC/240V AC 24V DC to 75V DC	16	35	1 7/8"	1 5/16"	1 5/16"	IP20	CE Marked, UL 94 V-0, UL Recognized Component, C-UL Recognized Component, VDE Certified	0000000	00000
For Heating
Nonadjustable
50° F/10° C	18° F/10° C	±9° F/±5° C	120V AC/240V AC 24V DC to 75V DC	16	35	1 7/8"	1 5/16"	1 5/16"	IP20	CE Marked, UL 94 V-0, UL Recognized Component, C-UL Recognized Component, VDE Certified	0000000	00000
59° F/15° C	18° F/10° C	±9° F/±5° C	120V AC/240V AC 24V DC to 75V DC	16	35	1 7/8"	1 5/16"	1 5/16"	IP20	CE Marked, UL 94 V-0, UL Recognized Component, C-UL Recognized Component, VDE Certified	0000000	00000
77° F/25° C	18° F/10° C	±9° F/±5° C	120V AC/240V AC 24V DC to 75V DC	16	35	1 7/8"	1 5/16"	1 5/16"	IP20	CE Marked, UL 94 V-0, UL Recognized Component, C-UL Recognized Component, VDE Certified	0000000	00000

Enclosure Thermostats for Multiple Devices

Nonadjustable Thermostat

Keep electronics in your enclosure from getting too hot or cold with these thermostats that control two devices at once. Clip them to a DIN rail to install.

Nonadjustable thermostats prevent tampering and accidental changes.

Heating and cooling thermostats control heaters and fans or air conditioners.

Heating and cooling thermostats with two actuation points control two devices independently. When your enclosure temperature is within the set range, neither device is powered, so they’re more efficient than changeover thermostats. For each device, temperature setting is the high end of the temperature range, and temperature difference is the size of the range. For a thermostat with temperature settings of 59° and 95° F and an 18° F temperature difference, the heater will switch on when your enclosure is colder than 41° F and turn off when it reaches 59° F. The fan or other cooling device will switch on when the temperature goes above 95° F and turn off once the enclosure cools to 77° F.

Cooling thermostats regulate two cooling devices, such as a fan and an air conditioner, for two-stage cooling. Use only one device for cooling in mild temperatures or both for extreme heat. These thermostats switch your equipment on when the enclosure is hotter than the temperature setting. Once the temperature is reduced by the temperature difference, it will switch off. For example, a thermostat set at 77° F for a fan and 140° F for an air conditioner will power both devices when the enclosure is over 140° F. With a temperature difference of 18° F, the air conditioner will switch off when the temperature goes below 122° F. The fan will run until the temperature reaches 59° F, and switch back on if it heats up to 77° F or hotter.

All thermostats meet IP20, which means they’re designed so fingers can’t fit inside and get shocked. They also meet UL 94 V-0, so they self-extinguish within 10 seconds if they catch on fire and won’t spread the fire by dripping. Thermostats that are CE marked or VDE certified meet European safety standards. UL Recognized Component and C-UL Recognized Component thermostats also meet American and Canadian safety standards.

Heating and Cooling Thermostats with Two Actuation Points

Heating Temperature			Cooling Temperature				Overall
Setting	Difference	Tolerance	Setting	Difference	Tolerance	Voltage	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
Nonadjustable
59° F/15° C	18° F/10° C	±9° F/±5° C	95° F/35° C	18° F/10° C	±12.6° F/±7° C	120V AC/240V AC 24V DC to 75V DC	1 7/8"	2 1/2"	1 5/16"	IP20	CE Marked, UL Recognized Component, C-UL Recognized Component, UL 94 V-0, VDE Certified	0000000	000000
59° F/15° C	18° F/10° C	±9° F/±5° C	122° F/50° C	18° F/10° C	±12.6° F/±7° C	120V AC/240V AC 24V DC to 75V DC	1 7/8"	2 1/2"	1 5/16"	IP20	CE Marked, UL Recognized Component, C-UL Recognized Component, UL 94 V-0, VDE Certified	0000000	00000
77° F/25° C	18° F/10° C	±9° F/±5° C	122° F/50° C	18° F/10° C	±12.6° F/±7° C	120V AC/240V AC 24V DC to 75V DC	1 7/8"	2 1/2"	1 5/16"	IP20	CE Marked, UL Recognized Component, C-UL Recognized Component, UL 94 V-0, VDE Certified	0000000	00000

Cooling Thermostats with Two Actuation Points

Cooling Temperature			Cooling Temperature				Overall
Setting	Difference	Tolerance	Setting	Difference	Tolerance	Voltage	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
Nonadjustable
77° F/25° C	18° F/10° C	±9° F/±5° C	140° F/60° C	18° F/10° C	±12.6° F/±7° C	120V AC/240V AC 24V DC to 75V DC	1 7/8"	2 1/2"	1 5/16"	IP20	CE Marked, VDE Certified, C-UL Recognized Component, UL 94 V-0, UL Recognized Component	0000000	000000
122° F/50° C	18° F/10° C	±12.6° F/±7° C	140° F/60° C	18° F/10° C	±12.6° F/±7° C	120V AC/240V AC 24V DC to 75V DC	1 7/8"	2 1/2"	1 5/16"	IP20	CE Marked, VDE Certified, C-UL Recognized Component, UL 94 V-0, UL Recognized Component	0000000	00000