The Supermicro PWS-0061 is capable of 410W output power at 77% efficiency. PWS-0061 is compatible with PWS-521-1H, PWS-351-1H, PWS-601-1H, PWS-505P-1H, PWS-441P-1H, PWS-350-1H, and more. Enjoy the simplicity of active power factor correction (PFC) and automatically correct DC input for a full range of voltages and a quiet fan to keep it cool under heavy loads. This power supply is designed to not only provide you reliable power to your Supermicro 1U server but also protects it from over voltage, over current and short circuiting via protective circuitry embedded into the unit. All materials contained comply with RoHS requirements and is certified by Supermicro.