Safety transformer, 40VA primary AC 230V, 50Hz, secondary 12V, 16V, 24V, 32V AC with PTC fuse, 5TE++ Safety transformers provide a safety extra-low voltage to supply control circuits, switching relays or Insta contactors. These safety transformers up to 63 VA provide a safety extra-low voltage to supply control circuits, switching relays or Insta contactors in continuous operation as an AC power supply for AC 8 V, 12 V, 16 V, 24 V and 32 V. Siemens safety transformers are protected against short circuits or moderate overloads by a PTC resistor. Whether for infrastructure or industrial requirements, Siemens offers safety transformers for all applications and every field of use. Siemens power supplies are characterized above all by: 1. Convenient and simple assembly and connection technology. 2. Reliable safety during installation thanks to touch protection as standard. 3. Integrated short circuit and overload protection. 4. Optimum technology for a secure power supply for your safety - only from Siemens.