Isolation barrier and signal transfer
The SFH615AGB-X009 is a single-channel optoisolator from Vishay with a 5300Vrms isolation rating, built for galvanic isolation between a DC input and a transistor output. The current transfer ratio (CTR) spans 100% to 600% at a forward current of 5mA, giving you a wide gain window to work with when sizing the load resistor on the output side. Typical turn-on time is 2µs and turn-off is 25µs, which suits line-frequency sensing, relay coil drives, and digital status feedback — not high-speed PWM or fast data links.
Output ratings and drive capability
The output transistor can handle up to 70V and 50mA continuous per channel, with a saturation voltage of 400mV max. That's enough to drive a small relay coil, a logic input, or an indicator LED directly. The 60mA absolute maximum forward current on the input side means you can push the LED hard if needed, but staying near the 5mA test point keeps the CTR in its specified band and avoids thermal drift.
Temperature range and storage
The 4-SMD Gull Wing package is surface-mount, so reflow profiles need to respect the 100°C upper limit during soldering — no lead-free peak that exceeds the device rating. Store the reels dry; MSL level is not stated here, but typical for this package class is MSL 1 or 3 — treat as moisture-sensitive unless confirmed otherwise.
Lifecycle and compliance
The wide CTR range and standard 4-SMD footprint mean it cross-references easily to other Vishay or competitor parts in the same family if a second-source need arises.