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HLK-PM03 3.3V/3W Switch Power Supply Module is a plastic enclosed PCB mounted isolated switching step-down power supply module. It can supply 3.3V DC from  120V AC – 230V AC and has a power rating of 3 Watt.This makes it perfect for small projects that need a 3.3 volt supply from mains. There are many advantages to these modules, such as low-temperature rise, low power, high efficiency, high reliability, high-security isolation, etc.This Power Supply Module voltage source is a switching source, so you do not have to worry about fluctuations in the voltage grid. It is considered designing to mount on the PCB and is the ideal solution to power pads that you take.It is widely used in a smart home, automation and control, communication equipment, instrumentation, and other industries.Features:Ultra-thin, ultra-smallAll voltage input (AC: 100 ~ 240V)Low ripple and low noiseOutput overload and short circuit protectionHigh efficiency, high power densityThe product is designed to meet the requirements of the EMC and Safety TestLow power consumption, environmental protection, no-load loss <0.1WEnvironmental conditions:Technical indicators: Single bitWorking temperature: -25-60 deg CelsiusStorage temperature: -40-80 deg CelsiusRelative humidity: 5-95%Heat Dissipation Mode: Natural coolingThe atmospheric pressure: 80-106Kpa.Package Includes:1 x HLK-PM03 3.3V/3W Switch Power Supply Module.