The PWS-601S-1R is a redundant power supply unit designed by Supermicro. Here are some key features: Output : It provides up to 600W output. Format : It is designed for 1U server systems. Input : It supports DC 48V input. Efficiency : It has an efficiency of 92%. Dimensions : The dimensions are 54.5 x 40 x 220 mm (W x H x L). PMBus : It supports PMBus 1.2. Compatibility : It is compatible with PWS-406P-1R, PWS-407P-1R, PWS-606P-1R, and PWS-608P-1R platforms. This power supply unit is designed for Supermicro 1U server systems and features redundancy support and a hot-swappable feature. It is Supermicro certified. The power supply has active PFC for high efficiency¹. It is designed for short depth server systems and has backplanes (Gold Finger).