The ELG-150-12A is a MEAN WELL LED driver in an aluminium housing with a 12 V output. It works in two modes — constant voltage and constant current — and delivers up to 120 W when the mains supply sits between 200 and 305 V AC. The "A" version carries a built-in potentiometer for setting the output voltage and current.
What it powers and how to size it
The output provides 12 V at a rated current of 10 A, which is 120 W. Compare that figure with the total draw of the load: for an LED strip, multiply its wattage per metre by the length of the run and check the result stays below 120 W. The input accepts 100 to 305 V AC at 47–63 Hz, so it runs on a 230 V mains without an additional transformer.
Typical efficiency is 88.5% and no-load consumption stays under 0.5 W. Active PFC keeps the power factor above 0.95 at full load on 230 V, and the manufacturer states that three such drivers can share one 16 A type B circuit breaker.
Adjusting voltage and current
The built-in potentiometer sets the output voltage anywhere between 10.8 and 13.2 V and the current limit between 5 and 10 A. Raising the voltage compensates for the drop along long supply leads, while lowering the current limit reduces output power without swapping the driver. This is the function that separates the A version from the plain one — and the reason it is rated IP65 rather than IP67.
Where to mount it
The housing measures 219 × 63 × 35.5 mm — a dimension to compare with the space left in a suspended ceiling, a cabinet or an installation box. Four holes of 4.5 mm diameter in the mounting flanges, 195 mm apart, take the fixing screws.
IP65 means a dust-tight housing protected against water jets, and the manufacturer allows a case temperature from −40 to +90 °C. The driver has no fan and sheds heat through its metal body, so it needs free air around it. The leads are about 300 mm long on each side: brown L and blue N on the input, red plus and black minus on the output.
To meet ErP requirements the driver may only be used behind a switch, not permanently connected to the mains. Stated lifetime exceeds 50,000 hours at a case temperature up to 80 °C, and the MEAN WELL warranty runs for 5 years.
