The HVG-240-54B is a 243W AC/DC LED power supply featuring a dual-mode constant voltage and constant current output. It operates over a wide input range of 180 to 528VAC and delivers a rated output of 54V at 4.5A within a constant current region of 27V to 54V. As a B-type model, it includes 3-in-1 dimming functionality (0-10VDC, 10V PWM, or resistance) and is enclosed in a metal housing with an IP67 rating for robust indoor or outdoor use. With high efficiency up to 93% and a built-in active PFC function, this fanless driver is designed for reliability in harsh environments. Common applications include LED street lighting, high-bay lighting, parking space lighting, and greenhouse lighting.