The XLC-40-KN Series from Mean Well are Multiple-Stage Constant Power LED Drivers. They require an input voltage of 100-305 V AC or 141-400 V DC. These LED drivers provide an output power of 40 W, an output current of 9-54 A, and an output open circuit voltage of 60 V. They have an efficiency of up to 88% and can function at a case temperature of -25 to 90°C. These drivers offer constant power mode output with multiple stages selectable by the ETS database. They utilize the KNX/EIB protocol and have a standby power consumption of less than 0.5 W. These LED drivers offer a minimum dimming level of 0.5% and ensure compliance with CE ErP directives. They are available in a package that measures 107 x 40 x 32 mm and are ideal for recessed light, down light, panel light, commercial lighting, decorative lighting, and KNX digital lighting applications.