H11A817A is a high-speed optocoupler designed by ON Semiconductor. It is a single-channel output type optocoupler. It uses an H11A817A fast high-output LED to send data across insulation from input to output. The LED has fast rise and fall times as low as 4ns. The device operates at a supply voltage of 5V and features a maximum load current of about 10mA. It has an isolation voltage of 5kVrms and an insulation resistance of 5.6kO. It is used in motor control applications, digital I/O isolation, and other situations where a fast response is required.