Same capacity but different frequency; the core cross-section, turns, impedance, and noise are all different: Designed for 60Hz markets like the Philippines, it explains why 50Hz inventory cannot be applied and how to avoid overheating due to high magnetic flux.
Based on three aspects: no-load loss, load loss, and total cost of ownership, we analyze the selection logic and recovery period calculation method for upgrading from S13-M to high-efficiency level S20/S22.