AVR SX440, 50/60Hz.110~600V. SX440 is a half-wave phase-controlled thyristor type Automatic Voltage Regulator(AVR) and forms part of the excitation ... .0% We also have R230, R250, R438, R448, R449, SX460, SX440, AS440, MX341, MX321, SR7, UVR6, SE350, M16FA655A, M40FA640A/A, VR6 ...