Technical Information & Details on MEAN WELL HLG-40H-42AB Power Supply Output Power: 40 W Output Voltage: 42 V DC Output Current: 0.95 A Input Voltage Range: 90 – 305 V AC / 127 – 431 V DC, 47 – 63 Hz Efficiency: up to 88 % Ripple & Noise: ≤ 240 mVp-p Inrush Current: max. 50 A at 230 VAC No-Load Power Consumption: < 0.5 W Operating Temperature: −40 °C to +80 °C (case temperature) Cooling: fanless, free air convection Protection Functions: Short circuit (Hiccup mode), Overload, Overvoltage, Over temperature (auto recovery) IP Rating: IP65 waterproof Isolation Voltage: 3.75 kV AC between input and output Dimensions (L x W x H): 171 mm x 61.5 mm x 36.8 mm Weight: ca. 730 g Safety & EMC Certifications: UL8750, TUV EN61347-1/-2-13, CB, CE, EAC Dimming Function: 3-in-1 (1-10 V DC, 10 V PWM, Resistance), adjustable Vo and Io Manufacturer Warranty: 7 years Information on MEAN WELL HLG-40H-42AB The MEAN WELL HLG-40H-42AB is a high-performance 40 W LED power supply with constant voltage and constant current modes, designed for demanding outdoor and industrial applications. Its strengths include an extremely robust construction with IP65 protection for waterproof installations, impressive efficiency up to 88 %, and an ultra-wide operating temperature range from -40 °C to +80 °C case temperature, ensuring long-term reliability even in harsh conditions. Unique features encompass built-in active PFC, 3-in-1 dimming (1-10V, PWM, resistance) with adjustable output voltage (25-46 V) and current, plus 4 kV surge immunity, ideal for LED lighting in street lights, high-bay luminaires, parking garages, and greenhouses.