A popular question is what happened to the exemption for light dependant resistors. In particular, with reference to the very popular ORP12 and its derivatives.
This was exemption 40 of the RoHS Directive “Cadmium in photoresistors for analogue optocouplers applied in professional audio equipment”. This expired on 31 December 2013 so it can be no longer be used and there is no replacement exemption. There are no drop-in replacements available.
With thanks to Dr Paul Goodman of ERA Technology