Bell transformer, 18VA primary 230-240V AC, 50Hz, secondary 8V, 12V AC with PTC fuse, 2TE++ Bell transformers for controlling bells, gongs, door openers or remote switches. The typical application of these bell transformers is short-term use, as occurs with bells, gongs, door openers or remote switches in residential buildings. The secondary rated voltages range from AC 4 V to 24 V. Siemens bell transformers are protected against short circuits or moderate overloads by a PTC resistor. Whether for infrastructure or industrial requirements, Siemens offers bell transformers for all applications and every area 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 standard touch protection. 3. Integrated short circuit and overload protection. 4. Optimum technology for secure power supply for your safety - only from Siemens.