The H11A53S is officially obsolete per onsemi's lifecycle status. No direct successor is listed — this part is sourced through independent distribution, with quantities confirmed at RFQ.
Isolation barrier and signal path
Single-channel optoisolator with a DC input LED (Vf typ 1.18 V, max continuous If 100 mA) and a phototransistor output with base access. The 5300 Vrms isolation rating qualifies it for reinforced isolation in mains-referenced circuits — a common choice for PLC digital inputs, motor-drive feedback, and industrial sensor interfaces where galvanic separation is required. Minimum current transfer ratio of 30 % at If = 10 mA ensures the output transistor saturates reliably at moderate forward current. Typical turn-on and turn-off times of 2 µs each suit low-to-mid-speed switching applications such as 24 VDC logic-level translation or relay coil driving.
Package and temperature grade
Supplied in a 6-SMD gull-wing package (supplier device package 6-SMD) on tube carrier. Surface-mount assembly requires standard reflow profile for a small-outline IC — no special handling beyond normal MSL precautions. Rated for -55 °C to +100 °C operating ambient, spanning industrial and some military temperature ranges. The 30 V maximum collector-emitter voltage (Vce) and 400 mV max saturation voltage (Vce(sat)) define the output rail compatibility — typically 5 V or 12 V logic or relay coils.