5000Vrms isolation for industrial and power designs
The FOD817300: Rated for 5000Vrms isolation — this is the primary safety spec for galvanic separation in AC-DC power supplies, motor drives, and PLC digital inputs. The 4-DIP through-hole package keeps creepage distance consistent with the isolation rating, so no additional slotting is needed on a 2-layer board.
CTR spread and drive margin
Current transfer ratio spans 50% min to 600% max at 5mA forward current. That spread means the designer must verify the downstream logic threshold is met at the minimum CTR across temperature. For a 5mA LED drive, the output transistor can sink up to 50mA — enough to drive a relay coil or a logic gate input directly.
Operating from -55°C to 110°C covers outdoor telecom cabinets and industrial enclosures without derating. Typical rise/fall times of 4µs and 3µs limit this part to low-frequency switching — think 50/60Hz line sync or DC-level sensing, not high-speed data isolation.
The FOD817300 is a standard through-hole DIP — no MSL concerns, no moisture bake needed before assembly. Confirm the mating pin spacing (0.300" row-to-row) matches your PCB layout before committing.