Nanocrystalline toroidal core 16×10×6 mm

Applications

• small current transformers
• gate-drive transformers
• low-power auxiliary transformers
• sensor cores
• low-current instrument/protection current transformers
• MOSFET/IGBT gate-drive isolation transformers
• low-power auxiliary bias transformers
• precision current-sensing cores

When to choose this size

This 16×10×6 mm toroidal CT core is the compact option in the nearby size family. Use it when the design is limited by board space, enclosure height, or a small current transformer footprint, and the secondary can be wound with relatively few turns of fine wire. Move up to the 20×12×8 mm core when you need a larger winding window, heavier magnet wire, or more VA than this part can comfortably support. The 25×16×10 mm core adds still more window and magnetic area for higher current, more turns, or easier termination. In short, pick CCNT-016-010-006-MFBL for compactness and low-current sensing; pick the 20 mm or 25 mm cores when winding space and power handling come first.

Winding notes

Magnetic calculations should use the bare 16×10×6 mm geometry (Ae 0.15 cm², Le 4.1 cm). The winding must fit the finished window: cased ID is 8.2 mm, not the 10 mm bare ID. Keep the winding distributed around the toroid to limit leakage and local heating. High permeability (μi 80,000) supports useful magnetizing inductance at low turns for small CTs and isolated gate-drive transformers; stay within 1.25 T saturation and the -40°C to +130°C Class B case limit.