GST120A12-R7B is a part manufactured by Mean Well, a leader in power supply solutions. It is a 120W single output switching power supply for LED applications. It features a wide operating temperature range of -4°F to 122°F (-20°C to +50°C). It also features a wide input voltage range of 100 ~ 305VAC, 47 ~ 63 Hz, with active PFC and built-in remote on/off control. The output is adjustable and offers overload, short circuit, over voltage protections. In addition, it has protections against input surge which is compliant to IEC61000-4-5 level 3 standards. The efficiency of the GST120A12-R7B is up to 92% at full load and it is adaptable to be mounted inside a cabinet or external.