Vishay low input current optocoupler with a phototransistor output VOM617A and VOM618A series protect equipment users from electrical shocks and protect the microprocessors within these systems from being damaged by voltage spikes.

VOM617A and VOM618A series provides up to 3750Vrms of voltage Isolation
Applications include Isolation in AC adapters, switch mode power supplies, programmable logic controllers, Industrial controls, telecom systems, smart meters, office equipment, power on Internet and solar
Optocouplers VOM617A and VOM618A have an operating temperature up to 110 degrees Celsius.

Optocouplers, Vishay Semiconductor