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  • Mechanical Thermostat FZK 021 NO+NC

наименование товара:Mechnical Thermostat FZK 021

Модель продукта:FZK 021


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Technical Data

FZK 021
Switch temperature difference+/-5℃
sensor elementthermostatic bimetal
Contact typechange-over snap-action contact
service life > 100,000 cycles
Max.switching caoacity10mA
Max. switching capacityNC: 250VAC / 120VAC, 10 (4) A; DC 30W
NO: 250VAC / 120VAC, 5 (2) A; DC 30W
Max. inrush current AC 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
Dimensions64 x 46 x 37mm
Weightapprox. 70g
Fitting Positionvariable
Operating/Stirage temperature-45 to +65℃(-49 to +149℉)
Operating/Stirage humiditymax.90% RH (non-condensing)
Protection typeIP20
Art. No. Contact breaker (NC)Setting Range) Operating Voltage
02170.0-00 +5 to +60℃230VAC, 50/60Hz
02170.0-01 +40 to +140℉230VAC, 50/60Hz
02170.0-02 -20 to +35℃230VAC, 50/60Hz
02170.9-00 +40 to +140℉120VAC, 50/60Hz
02170.9-01+5 to +60℃120VAC, 50/60Hz

 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 wires, wire end ferrules must be used.


  • Характеристики

> Adjustable temperature

> High switching capacity

> Small hysteresis

> Change-over contact

> Clip fixing


  • Структурная Диаграмма

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  • сертификация
  • заявка

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.


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