Nanocrystalline toroidal core 30×20×12 mm

Applications

• higher-power line filters
• VFD EMI suppression
• industrial drive chokes
• solar inverter input filters
• higher-power (50–200W class) AC line common-mode filters
• VFD/industrial drive EMI suppression cores
• solar/wind inverter input filter chokes
• three-phase industrial EMI filters

When to choose this size

This 30×20×12 mm toroidal core is sized for higher-power line filters and related designs in the nearby size family. Step down to the 25×20×10 mm core when board space, enclosure height, or a tighter footprint matters more than winding room. Within the same 30 mm OD, the 30×20×15 mm core adds stack height and Ae when you need more VA or easier secondary winding without growing the outer diameter. If height is constrained, the 30×20×10 mm core keeps the same OD with a lower profile. Move up to the 32×20×15 mm core when you need a larger outer diameter, winding window, or higher throughput than this part can comfortably support. In short, pick CCNT-030-020-012-HFWH when your design for higher-power line filters fits this window and OD; pick a neighbor when compactness or power handling shifts the trade-off.

Winding notes

Magnetic calculations should use the bare 30×20×12 mm geometry (Ae 0.49 cm², Le 7.9 cm). The winding must fit the finished window: cased ID is 18 mm, not the 20 mm bare ID. Distribute common-mode windings evenly and keep leakage paths short for EMI filter performance. High permeability (μi 80,000) supports useful magnetizing inductance at practical turn counts; stay within 1.25 Tesla saturation and the -40°C to +130°C PBT Class B 130C limit.