Ferrite Toroid Core 25mm x 15mm x 12mm 1 Pack
Ferrite Toroid Core — 25mm × 15mm × 12mm (1 Pack)
Clean power and clean signal start with the right core. This ferrite toroid is a workhorse component for builders, hobbyists, and technicians who refuse to let EMI and RFI dictate the performance of their circuits. Whether you're winding a choke for your power supply, building a balun for an amateur radio antenna, or suppressing conducted noise in a switching regulator, this core delivers.
Specifications
- Outer Diameter (OD): 25 mm (0.98 in)
- Inner Diameter (ID): 15 mm (0.59 in)
- Height: 12 mm (0.47 in)
- Material: Sintered ferrite (MnZn or NiZn — optimized for high-frequency applications)
- Form Factor: Toroidal ring
- Pack Quantity: 1 core
Key Benefits
- Broad-spectrum noise suppression — Effective attenuation of common-mode noise across a wide frequency range, from audio through RF
- Closed magnetic path — Toroidal geometry minimizes flux leakage and self-shielding eliminates the need for additional magnetic shielding in most layouts
- Low energy loss — High permeability material keeps core losses minimal at operating frequencies
- Compact and versatile — Easy to hand-wind; fits most standard wire gauges for DIY inductors, chokes, and baluns
Common Applications
- Common-mode chokes and EMI/RFI filters
- Amateur radio antenna baluns and ununs (1:1, 4:1)
- Switch-mode power supply (SMPS) output filters
- Signal transformers and audio isolation transformers
- Line filters for CB and HF radio equipment
- Ferrite bead choke alternatives for higher inductance requirements
Usage Notes
The toroidal winding geometry maximizes inductance per turn while keeping stray capacitance low — a key advantage for RF work. Wind turns evenly around the core and avoid bunching to maintain consistent permeability across all turns. For high-power applications, verify the core's saturation flux density against your peak operating current before finalizing your design.
Sold as a single core. Need more? Contact us for bulk pricing.