Optocouplers transistor AOT128A, consisting of a radiating diode based on the gallium-aluminum-arsenic compound and silicon phototransistors. Designed for non-contact switching of direct current with galvanic isolation between input and output. AOT128A: Input voltage: not more than 1.6 V; Output residual voltage: not more than 0.3 V; Leakage current at the output: not more than 10 μA; Insulation resistance: not less than 100 GΩ; Rise time of the output signal: 5 ns; Decay time of the output signal: 5 ns; Maximum input current: 40 mA; Maximum pulse input current: 100 mA; Maximum input reverse voltage: 0.5 V; Maximum switched output voltage: 50 V; Maximum output current: 8 mA; Maximum insulation voltage: 1500 V