NT 40-F Electrical Enclosure Thermostat 120V With Ce Rohs

Electrical Enclosure Thermostat(Tamper-proof (Pre-set) Thermostat) NT 40-F: Contact maker/NO (blue casing) for regulating filter fans, heat exchangers, cooling devices or for switching signal devices when temperature limit has been exceeded. The contact closes when temperaure is rising.

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  • Small size
  • Default temperature settings
  • Easy to install
  • High switching accuracy
  • Structure Chart


NT 39-F / NT 40-F
Sensor element thermostatic bimetal
Contact type snap-action contact
Service life > 100,000 cycles
Max. switching capacity 250VAC, 5 (1.6) A / 120VAC, 10 (2) A
DC 30W
Max. inrush current AC 16A for 10 sec.
Connection 2-pole terminal, clamping torque 0.8Nm max.:
rigid/stranded¹ wire 2.5mm² (AWG 14)
Mounting clip for 35mm DIN rail, EN 60715
Casing plastic according to UL94 V-0, light grey
Dimensions 33 x 33 x 58mm
Weight approx. 30g
Fitting position variable
Operating/Storage temperature -40 to +80°C (-40 to +176°F) / -45 to +80°C (-49 to +176°F)
Operating/Storage humidity max. 90% RH (non-condensing)
Protection type IP20

¹ When connecting with stranded wires, wire end ferrules must be used.

Art. No. Contact Switch-off temperature Switch-on temperature
39NCF01 Contact breaker (NC) +15°C / +59°F +5°C / +41°F
39NCF02 Contact breaker (NC) +25°C / +77°F +15°C / +59°F
39NCF03 Contact breaker (NC) +10°C / +50°F 0°C / +32°F


Art. No. Contact Switch-off temperature Switch-on temperature
40NOF01 Contact breaker (NC) +50°C / +122°F +40°C / +104°F
40NOF02 Contact breaker (NC) +60°C / +140°F +50°C / +122°F
40NOF03 Contact breaker (NC) +35°C / +95°F +25°C / +77°F