Magnetic Ferrite Hole Beads 4×2×2 mm – Ferrite Core Ring for EMI/RFI Suppression

Engineered for effective EMI/RFI filtering, these compact 4×2×2 mm ferrite core rings provide a closed magnetic path to attenuate high‑frequency noise on power and signal lines. Built from high-resistivity Nickel Zinc Ferrite (NiZn), they are ideal for noise suppression in electronics components, Arduino and Raspberry Pi projects, radio modules, and microcontroller-based circuits where clean signals and stable voltage rails are essential.

⭐ Key Features

• NiZn ferrite material for broadband high‑frequency attenuation (typical EMI/RFI ranges).
• Closed-ring (self‑shielding) design concentrates flux and reduces radiated fields.
• Hollow core allows single or multiple turns of wire to boost impedance and filtering effect.
• Ultra-compact size (OD 4 mm, ID 2 mm, height 2 mm) fits tight layouts and small harnesses.
• Corrosion-resistant ceramic with durable magnetic gray metallic finish.

🔧 Typical Applications

• Noise suppression on Arduino, Raspberry Pi, and microcontroller boards (3.3 V / 5 V rails).
• Filtering on sensor leads and data lines (I2C, SPI, UART) in electronics modules.
• Power lines for DC/DC converters, servo control leads, and RF front-end bias lines.
• DIY projects requiring compact EMI filtering on thin wires, jumpers, or enamelled wire.
• Creative builds (e.g., tactile assemblies); note: ferrite is ceramic and can be brittle.

📐 Technical Specifications

• Material: Nickel Zinc Ferrite (NiZn)
• Dimensions: 4 × 2 × 2 mm (Outer Diameter 4 mm, Inner Diameter 2 mm, Height 2 mm)
• Color: 1g3 Magnetic Gray Metallic
• Design: Hollow ferrite bead / ring core (self‑shielding flux path)
• Primary Usage: Anti‑interference EMI filtering for power and signal conductors

🧰 Installation & Usage Tips

• Thread the conductor through the 2 mm inner diameter hole. Use multiple turns to increase impedance (effect scales approximately with N² turns).
• Place the bead close to the noise source or the entry point to your sensitive circuit.
• Effective at high frequencies; has minimal impact on DC or low‑frequency signals and voltage levels.
• Suitable for thin wires and jumpers commonly used with Arduino/Raspberry Pi and similar modules.

⚠️ Notes

• Ferrite is a ceramic: handle gently; avoid impact or crushing.
• These are not strong permanent magnets; they function as ferrite cores for EMI suppression.
• Ensure your conductor diameter (including insulation) fits within the 2 mm ID.

Optimize your electronics builds with reliable, compact ferrite core rings—a practical choice for clean power, quieter signals, and improved EMC performance across Arduino, Raspberry Pi, and other microcontroller platforms. 🚀