Type series A switches are based on a complex system consisting of a contact spring unit and a thermo-bimetal snap-disc. When heating up to the fixed switching point, the contact opens, and thus interrupts the power circuit.

They are very flexible to use: Due to the different types of reset, and the adjustable current sensitivity for rapid shutdowns, the A switches offer a very good solution, especially in very specific safety concepts.

Temperature monitor with automatic reset A10: After a certain cooling phase (temp. hysteresis) the contact switches back automatically.

Temperature limiter with a manual reset A20: After opening the contacts, and the subsequent cooling the contacts remain open until a manual reset is performed on the reset pin.

Temperature monitor with electr. self-retaining A30 (230V) / A40 (120V): After opening the contacts the switch is heated by a parallel connected resistor, and thus kept open. The automatic reset is only performed through a mains disconnection, or off-switching of the device in which the temperature monitor is installed.

• Combination of temperature and current sensitivity ith the option to set a trigger time
• Switching current up to 16A
• special versions for printed circuit boards (SMD, THT)
• Applications in moving air:
  Radiator fan, heating fan, hair dryer, dryer

• Thermal motor protection
• Controller
• Limiter
• Safety switch

• Domestic appliances
• Dryer
• Cooking devices
• Radiant warmers
• Heaters and heating Elements
• Fan heater, hand dryer
• Automobile: Radiator fan