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Description and application


TFA temperature switches are designed as two-state controllers (on / off control) that compare set temperature with momentary temperature and switch galvanically separated relay contacts when the set temperature is reached. The required temperature is setting in the device according to the customer requirement and cannot be changed later.

Regarding sensing element location and switch application the following versions are available:

  • TFA 220 A – temperature switch for sensing temperature in the switch ambient. The sensing element is placed in the metal stem of the 60 mm length.
  • TFA 220 K – the sensing element is placed in the metal stem for use in air condition equipment or in tubings. This temperature switch version is available with a plastic holder. Stainless steel thermowell or metal holder can be delivered as an acsessory.
  • TFA 220 C – the sensing element is protected by the TG 8 case, 40 mm long, and provided with a cable 1 m long. Another case type or another cable length should be specified in the order.
  • TFA 220 P – contact version switch for fixing on pipeline surfaces for surface temperature measurements. The sensing element is housed in a measuring case made of metal, which is protected by a protection case made of SILICONE and SILAMID. It is delivered with the fastening strap of the length 40 cm and with closure device.

The switches are designed for operating in a chemically non-aggressive environment. Temperature switches TFA must not be used as an emergency switch.



  • Manufacturer provides EU Declaration of Conformity.
  • Calibration – The final metrological inspection – comparison with standards or working instruments – is carried out for all the products. Continuity of the standards and working measuring instruments is ensured within the meaning of the Section 5 of Act no.505/1990 on metrology. The manufacturer offers a possibility to supply the sensors calibrated in SENSIT s.r.o.’s laboratory (according to requirements of the EN ISO/IEC 17025 standard) or in an Accredited laboratory.  

  • Specifications
  • Wiring diagram
  • Dimensional draft
  • Download

Type of sensing element Ni 1000/5000
Power supply 230 V / 50 Hz
Maximum switched currnet /voltage
250 V AC / 6 A
Set point adjustment failure ± 0.5 °C
Standard hysteresis 2 °C
Connection of the switch according to the wiring diagram
Recomded wire crros section 0.35 to 1.5 mm2
Material of the connection head LEXAN 500R
Connection head dimensions 62 x 62 x 55 mm
Ambient temperature around the connection head
-25 to 70 °C
Ingress protection IP 54 in accordance with EN 60 529
Grommet type M 16 x 1.5
Weight depending on design, min. 0.2 kg

TFA 220 A
Standard lenght of the stem L1 60 mm
Diameter of the stem 6 + 0.2 mm
Material of the stem stainless steel DIN 1.4301
Switch installation on the wall, by means of a metal holder
Measuring range
-25 to 70 °C

TFA 220 K
Standard lenght of the stem L1 70, 120, 180, 240 mm
Diameter of the stem 6 + 0.2 mm
Material of the stem stainless steel DIN 1.4301
Switch installation by means of a plastic or stainless steel holder or a stainless steel thermowell
Measuring range
-25 to 200 °C (using an elongated stem above 120 °C)

TFA 220 C
Standard type of sensong TG 8 - 40, cable 1 m
Diameter of the case 5.7± 0.1 mm
Material of the case stainless steel DIN 1.4301
Lead-in cable shielded silicone 2 x 0.34 mm2
Ingress protection IP 67 in accordance with EN 60 529
Switch installation on the wall, by means of a metal holder
Measuring range
-30 to 200 °C

TFA 220 P
Material of the measuring case brass
Material protection case SILICONE and SILAMID
Switch installation by means of fastening tape with closure
Standard length of the tape
40 cm
Minimum diameter of tubing 20 mm
Measuring range
-25 to 70 °C

Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

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