The HLN-40H-54B is a switching power supply, manufactured by Mean Well. It is a 40 watt, single-output AC/DC power supply with 54VDC output voltage, a wide input voltage range of 80-264VAC and frequency range of 47-63 Hz, making it suitable for universal input applications. The power supply is both UL and CE certified and features overload, over voltage, and short circuit protection. It is designed to be used in LED lighting, security, medical, and industrial equipment applications.