Mechanical Thermostat
FZK 011

  • Adjustable temperature
  • High switching capacity
  • Small hysteresis
  • Change-over contact
  • Clip fixing

The mechanical thermostat is used for controlling heating and cooling equipment, filter fans or signal devices. The thermostat registers the surrounding air and can switch both inductive and resistive loads via snap-action contact. Functionality: The temperature setting on the scale equals to the upper switch point, which means that the NC contact opens. The temperature setting minus switch temperature difference (and tolerances) equals to the lower switch point, which means that the NC contact closes.

Technical Data

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Switch temperature difference5K (-3/+2K tolerance)¹
Sensor elementthermostatic bimetal
Contact typechange-over snap-action contact
Service life> 100,000 cycles
Min. switching capacity10mA
Max. switching capacity, NC250VAC / 120VAC, 10 (4) A
DC 30W
Max. switching capacity, NO250VAC / 120VAC, 5 (2) A
DC 30W
Max. inrush currentAC 16A for 10 sec.
Connection4-pole terminal, clamping torque 0.5Nm max.:
rigid/stranded² wire 2.5mm² (AWG 14)
Mountingclip for 35mm DIN rail, EN 60715
Casingplastic according to UL94 V-0, light grey
Dimensions67 x 50 x 38mm
Weightapprox. 0.1kg
Fitting positionvariable
Operating/Storage temperature-45 to +65°C (-49 to +149°F)
Operating/Storage humiditymax. 90% RH (non-condensing)
Protection typeIP20
ApprovalsUL File No. E164102, EAC

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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Art. No.Operating voltageSetting range
01170.0-00230VAC+5 to +60°C
01170.0-01230VAC+40 to +140°F
01170.0-02230VAC-20 to +35°C
01170.9-00120VAC+40 to +140°F
01170.9-01120VAC+5 to +60°C

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Technical Drawing

Mechanical Thermostat FZK 011

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