Mechanical Thermostat
FZK 011

  • Wide adjustment range
  • High switching capacity
  • SPDT (change-over) contact
  • Very low hysteresis option
  • DIN rail mountable

The FZK 011 mechanical thermostat is used for controlling heating and cooling equipment, filter fans or signal devices where a higher degree of sensing accuracy is required. An integrated resistor (RF) can be connected to improve the switch temperature difference (see Option note). The thermostat registers the surrounding air and can switch both inductive and resistive loads via snap-action contact.

Technical Data

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Switching differenceapprox. 9 °F (5 K), tolerance -5.4/+3.6 °F (-3/+2 K)1
Sensor elementthermostatic bimetal
Contact typeSPDT / change-over contact
Service life> 100,000 cycles
Min. switching capacity10 mA
Max. switching capacity, NC10 A resistive / 4 A inductive @ AC 120 V
10 A resistive / 4 A inductive @ AC 250 V
DC 30 W
Max. switching capacity, NO

5 A resistive / 2 A inductive @ AC 120 V
5 A resistive / 2 A inductive @ AC 250 V
DC 30W

Max. inrush currentAC 16A for 10 sec.

4-pole terminal, clamping torque 0.5 Nm max.:
solid/stranded² wire - AWG 14 max. (2.5 mm²)

Housingplastic, UL 94V-0, light grey
Mountingclip for 35 mm DIN rail, EN 60715
Mounting positionvariable
Operating / Storage temperature-49 to +149 °F (-45 to +65 °C)
Operating / Storage humiditymax. 90 %RH (non-condensing)
Dimensions2.64 x 1.97 x 1.5” (67 x 50 x 38 mm)
Weightapprox. 2 oz. (60 g)
Protection typeIP20
ApprovalsUL File No. E164102, EAC

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¹ If the Normally Closed contact is used, the switch temperature difference could be reduced by connecting terminal "N" (RF heating resistor). It causes the thermal feedback which is subject to surrounding conditions and thus has to be determined for each individual application.

² 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.

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Part No.Operating voltage3Setting range
01170.0-00AC 230 V5 to 60 °C
01170.0-01AC 230 V40 to 140 °F
01170.9-00AC 120 V40 to 140 °F
01170.9-01AC 120 V5 to 60 °C

3 Voltage only needs to be specified if the optional use of the RF resistor is desired

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Dimensioned Drawing

FZK 011 Mechanical Thermostat

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