Single-channel transistor-output optocoupler with 5300 Vrms isolation
The VO617A-3X018T from Vishay is a single-channel optocoupler with a phototransistor output, designed for DC input drive. Its 5300 Vrms isolation rating makes it suitable for breaking ground loops and providing safety isolation in power supplies, motor drives, and industrial controls.
CTR range and switching speed for BOM margin
Current transfer ratio spans 100% to 200% at a forward current of 5 mA, giving a 2:1 gain window that accommodates LED degradation and temperature drift without redesigning the load resistor. Typical rise and fall times are 2 µs each, with turn-on at 3 µs and turn-off at 2.3 µs — fast enough for 100 kHz switching or serial data isolation below 1 Mbps.
It is ROHS3 compliant.
4-SMD Gull Wing — rework-friendly footprint
Housed in a 4-SMD Gull Wing package, the leads are visible and accessible for inspection and hand rework. The 400 mV max Vce saturation at 50 mA output current means the transistor drops less than half a volt when fully on, keeping dissipation low in the 4-SMD body.