Mean Well LCM-40TW 40W DALI-2 Tunable White Constant Current LED Driver

Lighting designers and installers seeking precise tunable white control in commercial or architectural projects can rely on the Mean Well LCM-40TW. This 40W constant current LED driver supports DALI-2 DT6 and DT8 protocols, enabling smooth adjustment of both intensity and colour temperature for dynamic lighting scenes in offices, retail spaces, and hospitality environments.

Key specifications

• Output power: 40W
• Output current selectable via DIP switch: 350mA, 500mA, 600mA, 700mA, 900mA, 1050mA
• Input voltage: 180–295VAC
• Dimming protocol: DALI-2 (DT6 & DT8), Push Dim
• Tunable white support: Yes (DALI DT8 for Tc control)
• Efficiency: up to 90%
• Power factor: >0.95 at 230VAC full load
• Dimming range: 0.2% – 100%
• Standby power consumption: <0.5W
• Protections: short circuit, over voltage, over temperature
• Operating temperature (case): -20°C to +90°C
• IP rating: IP20
• Driver class: Class II
• Auxiliary power output: 12V / 50mA
• Surge protection: Line-Earth 5KV, Line-Line 2KV

Why choose it

The LCM-40TW integrates DALI-2 tunable white control into a compact, efficient driver. Its DIP switch current selection simplifies installation across various LED modules, while high power factor and low standby consumption contribute to energy-efficient lighting systems.

Ideal use cases

• Human-centric lighting in offices and healthcare facilities
• Retail displays requiring adjustable colour temperature
• Hospitality spaces with dynamic scene setting
• Architectural cove and accent lighting

Good to know

The driver is certified to ENEC, CE, CB, RCM, CCC, EAC, and UKCA standards. It operates on 180–295VAC input and is suitable for indoor installations only (IP20).