When sourcing Power One rectifiers, the price is heavily influenced by input/output voltage ranges, current capacity (Amps), and efficiency ratings. You must verify the Power Factor Correction (PFC) capabilities, as high-efficiency models (typically >94%) may have a higher upfront cost but offer significant long-term energy savings. Additionally, check for hot-swappable modules and N+1 redundancy features, which are critical for telecommunications and data center applications to ensure zero downtime.