GSM18E18-P1J is a single output, 18W, enclosed DC-DC converter module manufactured by Mean Well. It has a wide 2:1 adjustable input voltage range of 4.5V-18V and outputs a regulated 12V. It offers an extremely high efficiency of up to 87%, low ripple, overload protection, over-temperature protection and remote ON/OFF. It has the industry-leading power density of 15.62W/in3, making it ideal for space restricted applications. The semi-potted full metal enclosures provide good thermal performance and ruggedness. The GSM18E18-P1J is RoHS and cULus approved and is widely used in applications such as industrial automation, instrumentation, and battery-powered systems.