7.5 mm Inner Diameter Ring Iron T50-26 Toroid Ferrite Core

A compact, high-quality T50-26 iron powder toroidal core ideal for designing inductors, chokes, and filters in RF and power electronics. The industry-standard yellow/white color code identifies Material -26 (µi ≈ 75), making it a reliable choice for hobbyists and professionals working with Arduino, Raspberry Pi, and other microcontroller-based projects.

⚙️ Specifications

• Model: T50-26
• Core Material: Iron powder (Material -26, color-coded yellow/white)
• Outer Diameter (OD): ≈ 13 mm
• Inner Diameter (ID): ≈ 7.5 mm
• Height (Thickness): ≈ 5 mm
• Effective Magnetic Path Length (ℓe / Circumference): ≈ 3.19 cm
• Effective Cross-Sectional Area (Ae): ≈ 0.112 cm²
• Effective Volume (Ve): ≈ 0.358 cm³
• Inductance Factor (AL): 33.0 nH/turn² (typical for T50-26)
• Initial Permeability (µi): ≈ 75 (relative)
• Density: ≈ 7.0 g/cm³
• Curie Temperature: ≈ 825 °C
• Temperature Coefficient of Permeability: ≈ +825 ppm/°C
• Linear Thermal Expansion Coefficient: ≈ +12 ppm/°C

✨ Key Features

• Stable magnetic characteristics with low core loss suitable for HF inductors and power chokes.
• Low eddy current behavior thanks to powdered iron construction.
• Consistent performance over temperature with good reliability and durability.
• Convenient size for compact electronics modules and DIY builds.

🔧 Typical Applications

• Power transformers, inductors, and chokes for DC-DC converters and voltage regulators
• Current transducers and instrument transformers
• Ballasts and welding transformer prototypes
• Broadband transformers and RF filters
• Noise suppression and EMI filtering in Arduino/Raspberry Pi sensor and power lines

🧮 Design Notes

Use the inductance factor to size your winding:

• Inductance formula: L = AL × N²
• Turns required: N = √(L / AL)
• Example (10 µH): N ≈ √(10,000 nH / 33 nH) ≈ 17 turns
• Example (100 µH): N ≈ √(100,000 nH / 33 nH) ≈ 55 turns

Tips: Use enamelled copper wire sized for your current; distribute turns evenly around the core; and consider insulation tape for higher voltage or tighter windings.

🔗 Compatibility & Use Cases

Ideal for custom magnetics in Arduino and Raspberry Pi projects, sensor interfaces, power supply modules, and general electronics components development where a compact toroidal core is required.

📦 Package Contents

• 1 × 7.5 mm Inner Diameter Ring Iron T50-26 Toroid Ferrite Core  (yellow/white)