5300Vrms isolation with a 100–200% CTR bin
The SFH615A-3X007 is a single-channel phototransistor optocoupler from Vishay, providing 5300Vrms of galvanic isolation between input and output. It is binned as the '3' current-transfer-ratio grade, guaranteeing a CTR between 100% and 200% at a forward current of 10mA. This makes it a predictable choice for logic-level interface circuits where you need a known drive strength into a digital input or a low-speed load up to 50mA.
Switching speed and output drive
That puts it in the general-purpose optocoupler class — fine for 10 kbps to 50 kbps serial isolation, PLC input modules, or relay driver isolation, but not for high-speed data links. The output transistor can handle up to 70V and 50mA continuous, with a maximum Vce saturation of 400mV at the rated drive.
It is RoHS3 compliant.