SFH 7741 is a lead (Pb) free product that is RoHS compliant. It is a proximity sensor with a typical working distance of 30mm. The sensor utilizes opto-hybrid technology with a Schmitt trigger output and open drain structure. It has extremely low power consumption, a very small SMD package, and high ambient light suppression. The SFH 7741 is eye safe according to the IEC 62471 standard without the need for external lenses. It is suitable for short range proximity sensing applications.
The SFH 7741 is a compact opto‑hybrid proximity sensor with a Schmitt‑trigger open‑drain output. It offers a typical working distance of 30 mm, extremely low power consumption, and high ambient‑light suppression, making it suitable for short‑range detection without an external lens.
The datasheet provides full electrical characteristics, recommended operating conditions, and mechanical dimensions. It includes supply voltage ranges, output voltage levels, pull‑up resistor recommendations, and limits for ambient light, current, and temperature, as well as spectral information for the IR emitter and phototransistor. This manual is written in German.
| Typical working distance | 30 mm |
|---|---|
| Supply voltage (Vo) | 2.4 – 3.6 V |
| Output voltage (DVag) | 1.7 – 3.6 V |
| Pull‑up resistor (Rout‑up) | 10 – 1000 kΩ |
| Maximum ambient light | 1000 lux |
| Peak emission wavelength | 850 nm |
| Spectral sensitivity range | 730 – 1080 nm |
The sensor is specified for a typical working distance of 30 mm.
It operates with a supply voltage between 2.4 V and 3.6 V.
Yes, the device is a lead‑free, RoHS‑compliant product.
The sensor can tolerate up to 1000 lux of ambient light.