7500Vpk isolation — obsolete, sourced per RFQ
The onsemi H11A3FR2M is a single-channel optoisolator with a DC input and a phototransistor output that includes a base connection. Its headline rating is 7500Vpk isolation — this is the reinforced isolation level for applications where the primary-to-secondary barrier must withstand high-voltage transients, such as in medical equipment, industrial power supplies, or motor-drive feedback paths.
CTR, switching speed, and temperature range
The current transfer ratio (CTR) is a minimum of 20% at a forward current of 10 mA. This means the output transistor conducts at least 2 mA when the input LED is driven with 10 mA — a ratio that determines the minimum load current the opto can sink at the receiving end. The turn-on and turn-off times are both 2 µs typical, so the part switches at moderate speeds suitable for 50/60 Hz line synchronisation, relay drivers, or logic-level isolation below 250 kHz. The maximum collector-emitter voltage is 30 V, and the Vce saturation voltage is 400 mV max — the voltage drop across the output when fully on, which matters for calculating the power dissipation in the output stage.
Housed in a 6-SMD Gull Wing package with a Tape & Reel carrier, the part is surface-mount and intended for automated pick-and-place assembly.