DIN-Rail Power Supplies MEAN WELL DIN-Rail Power Supplies feature a wide range of AC-DC, DC-DC, specialty, and LED driver devices that adhere to industry standards. These DIN-rail power supplies from MEAN WELL comply with UL / CUL / TUV / CB / CE / GL / SEMI certificates. These certificates include UL 508, UL 1310, UL 60950-1, TUV EN60950-1, TUV EN61558-1/-2-16, IEC 60950-1, SEMI F47, GL, EN55011, and EN55022.