Product Description

1K107 nanocrystalline toroidal core (ring core) for common-mode choke (CMC) and EMI filtering is the hottest application in the soft magnetic market (~34% share). It provides ultra-high permeability for high inductance per turn, high saturation flux density (~1.25 T) for stable inductance under heavy DC bias, and excellent thermal stability from −40°C to +140°C. It is ideal for power supply EMI filters, EV onboard chargers (OBC), DC-DC converters and motor drive common-mode noise suppression.

Physical Properties (1K107 core)
Saturation flux density: ~1.25 T
Permeability @10kHz: ≥80,000
Curie temperature: ~560°C
Density: 7.2 g/cm³
Magnetostriction: <2×10⁻⁶

Core Sizes
Custom toroidal sizes (OD × ID × Height) per requirement, e.g. 40×32×15mm. AL value and impedance curve available on request.

Applications
• Common-mode choke (CMC) in power supplies
• EMI filter cores for SMPS, adapters, inverters
• EV onboard charger (OBC) and DC-DC EMI filtering
• Motor drive AC/DC output common-mode noise suppression
• EV heater system EMI suppression
• Solar inverter and charging pile filtering

Why Choose Us
Consistent high-permeability nanocrystalline cores with tight dimension tolerance. Custom OD/ID/height, AL value and winding support. Automotive AEC-Q200 grade available.

Quality Control
Permeability, AL value, dimension and appearance inspected per batch; MTC available.

Custom Service & Ordering
MOQ, delivery and FOB quoted per order. Please confirm OD, ID, height and target AL value.