What the 5000Vrms isolation rating buys you
The Renesas NEPOC PS8302L2-AX is a single-channel optocoupler with a DC-input LED and a phototransistor output, packaged in a 6-SOIC surface-mount case. Its 5000Vrms isolation voltage is the spec that defines its application space — motor-drive feedback, industrial PLC digital inputs, medical patient-interface isolation, and any system where a galvanic barrier must separate a high-voltage domain from a low-voltage controller. The transistor output is the classic open-collector topology: you pull up externally to the load voltage (up to 35V) and the phototransistor sinks up to 8mA per channel.
Switching speed — not just a 50/60 Hz part
Typical turn-on time of 300ns and turn-off time of 330ns put this optocoupler into the range for isolated serial data links, gate-drive feedback, and high-speed digital isolator applications — not just line-frequency sensing. The 15% minimum current transfer ratio at 16mA forward current means the output transistor has enough base drive to saturate cleanly even with a modest LED current, which keeps the input-side power budget under control.
Temperature range and package fit
ROHS3 compliance is confirmed, so no exemption paperwork needed for EU or California markets.
Lifecycle and sourcing posture
For BOM-fit verification, the key ratings to confirm against your design are the 5000Vrms isolation, the 15% minimum CTR at your chosen LED drive current, and the 8mA output current capability.