Enclosed temperature switches (B series)

Data sheet

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

B12, B13

Type series B switches have a thermo-bimetallic snap-disc with a fixed switching temperature as the switching element. In the case of an external temperature input, the double contact system of the switch and thus the circuit of the application is opened or closed. The heat transfer is performed from all sides onto the housing of the switch by means of convection or direct heat conduction.

B12 switches are universally applicable through their design, their wide range of performance and their diverse range of designs: as a protective switch, sensor, controller.

  • Opener B12A and closer contact B12B
  • Power insensitive
  • Switching current up to 30A
  • Versatile design Options
  • Low current version with gold contacts B13
  • Thermal motor protection
  • Temperature limiter
Application areas
  • Motors
  • Transformers
  • Chokes, electronics
  • Sensors
  • Control Technology
  • Pumps
  • Heaters and heating Elements
  • Converters


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


Microtherm Sentronic GmbH

   +49 7231 787-0         info@microtherm.de