5300Vrms isolation in a 4-SMD Gull Wing
The onsemi H11A817ASD is a single-channel optoisolator with a transistor output, rated for 5300Vrms isolation between input and output — sufficient for reinforced insulation in mains-referenced circuits like SMPS feedback loops, motor drive I/O, and PLC digital input isolation. Housed in a 4-SMD Gull Wing package (Supplier Device Package 4-SMD), it suits automated surface-mount assembly and reflow soldering, with the gull-wing leads providing visual solder-joint inspection access.
CTR window and switching speed
Current Transfer Ratio spans 80% minimum to 160% maximum at 5mA forward current — a 2:1 spread that design engineers must budget for in the receiver threshold logic. The 2.4µs typical rise and fall time sets the practical data rate ceiling around 100 kbit/s for clean pulse transmission.
Available through independent distribution and surplus channels.
Temperature range and DC input
Rated for -55°C to 100°C operating temperature, covering industrial control cabinets and outdoor telecom enclosures. The DC input type means it couples logic-level or DC signals — not intended for AC line sensing without external rectification. The single-channel configuration in a 4-pin SMD package saves board area compared to multi-channel DIP alternatives.