Semiconductor voltage stabilizer "SPN-400".Power supplies. Rectifiers, stabilizers, autotransformers, transient transformers, etc.Surge ProtectorsThe semiconductor voltage stabilizer "SPN-400" has been produced since the beginning of 1971 by the Saransk plant "Elektrovypryamitel". Designed to power TVs and other equipment with a power consumption of up to 400 watts. This is the first domestic semiconductor voltage regulator. The stabilizer operates from an alternating current with a frequency of 50 Hz and a voltage of 127 and 220 volts. Rated output stabilized voltage 220 V, efficiency 90%. When the mains voltage changes from 95 to 146 V (for a 127 V network) and from 156 to 253 V (for a 220 V network), the stabilized output voltage does not go beyond 198 ... 231 volts. THD of the output voltage is not more than 12%, with the THD of the input voltage is not more than 3%. The dimensions of the stabilizer are 262x127x138 mm, weight 5.5 kg. During production, which is more than 15 years, the stabilizer has been improved according to the scheme, its design has changed.