1/2″ switches (R28 series)

Data sheet

You will receive a complete overview of all variations in connection with all the technical data in the following data sheet:

R27, R28, R29

Switches of the R series are extremely robust switches with universal characteristics: they can be used as temperature monitors and controllers, current-capable up to 16A, specifically adjustable hysteresis and low tolerances up to ± 3K.

The plastic housing, the floor and the fastening are tension-free. The heat is applied directly to the thermo-bimetallic snap-disc via the contact surface (bottom), and thus allows a very rapid reaction. The connections vary in dimensions and mounting angles (0 - 90°).

Types R28 are automatically reset, whereas types R27 and R29 are manual-reset Switches.

  • high currents and high temperatures
  • up to 100,000 circuits
  • Response temperatures from 0 - 260°C
  • various connections (Faston connector, soldering and circuit board connections, Strands)
  • various attachments (fixed and loose mounting clip, threaded bottom, pipe clip)
  • low hysteresis up to 10K
  • low tolerances up to ±3K
  • Temperature limiter
  • Temperature Controller
Application areas
  • Domestic appliances
  • Coffee machines
  • Cooking devices
  • Railway Technology
  • electronic Equipment
  • Mechanical Engineering
  • Heaters and heating Elements
  • Heating Panels
  • Antifreeze
  • Diesel preheating (automobile)
  • as temp. sensor (gold contacts)


Do you have questions about the product?
Please contact us directly.

Microtherm Sentronic GmbH

   +49 7231 787-0         info@microtherm.de