The HMA121CR3V is a single-channel optocoupler with a transistor output type. It has a forward voltage of 1.3V (Max) and an input type of DC. The optocoupler has one channel with a minimum DC current transfer ratio of 100% at 5mA and a maximum DC current transfer ratio of 200% at 5mA. It has a rise and fall time of 3μs/3μs and an isolation voltage of 3750Vrms. With a maximum output voltage of 80V, it is suitable for use in isolators. The optocoupler operates in a temperature range of -40°C to 100°C and has a channel output current of 80mA. The supply and demand status is balanced.