T50-2 Carbonyl Iron Powder Toroid Core 4.5nH/N² Ferrite Ring
T50-2 Carbonyl Iron Powder Toroid Core 4.5nH/N² Ferrite Ring
T50-2 Carbonyl Iron Powder Toroid Core
The T50-2 Carbonyl Iron Powder Toroid Core is a precision-engineered ferrite ring core designed for electronics hobbyists, RF engineers, and DIY builders who demand reliable inductive performance. Built from high-quality carbonyl iron powder, this compact toroid core delivers stable inductance characteristics and excellent magnetic permeability for use in inductors, transformers, filters, and RF circuits.
Key Specifications
- Core Type: T50-2 Carbonyl Iron Powder Toroid
- Outside Diameter: approx. 12.7 mm (0.50 in)
- Inside Diameter: approx. 7.7 mm (0.30 in)
- Height: approx. 4.9 mm (0.19 in)
- Inductance Coefficient (AL): 4.5 nH/N²
- Magnetic Permeability: approx. 10 μ₀
- Material: Carbonyl Iron Powder
- Color: Red/Grey (standard Mix-2 coating)
- Mix: -2 (suitable for 2–30 MHz RF applications)
Why Choose the T50-2 Toroid Core?
- Stable Inductance: Carbonyl iron powder construction ensures consistent AL values across a wide frequency range, making it ideal for RF and HF circuit design.
- Low Core Loss: Excellent efficiency at high frequencies — a go-to choice for QRP radio builders, antenna baluns, and low-pass filters.
- Compact & Versatile: The small T50 form factor fits neatly into tight PCB layouts and DIY builds without sacrificing performance.
- Recognizable Color Coding: The standard red/grey finish immediately identifies the Mix-2 material type, simplifying inventory and assembly.
- Wide Application Range: Suitable for inductors, power chokes, broadband transformers, EMI filters, and amateur radio projects.
Typical Applications
- HF and RF inductor winding (2–30 MHz range)
- QRP amateur radio transmitters and receivers
- Low-pass and band-pass filter construction
- Antenna baluns and ununs
- Power supply chokes and EMI suppression circuits
- DIY electronics and educational lab projects
Learn More About Toroid Cores
For a deeper understanding of inductive components and their role in electronics, visit the National Institute of Standards and Technology (NIST) Electronics resources for standards and technical references used in electronic component design.
Frequently Asked Questions
Q: What is the T50-2 Carbonyl Iron Powder Toroid Core used for?
A: The T50-2 Carbonyl Iron Powder Toroid Core is widely used in RF and HF electronics applications, including inductor winding, broadband transformers, antenna baluns, low-pass filters, and QRP amateur radio builds. Its -2 mix material makes it especially well-suited for the 2–30 MHz frequency range.
Q: What do the T50-2 dimensions and AL value mean?
A: The "T50" designation refers to the toroid's approximate outside diameter of 0.50 inches (12.7 mm). The "-2" indicates the Mix-2 carbonyl iron material type (red/grey color coding). The AL value of 4.5 nH/N² means that for every turn of wire wound around the core, you add approximately 4.5 nanohenries of inductance squared per turn — essential for calculating the number of turns needed to achieve a target inductance.
Q: How many turns do I need to wind to achieve a specific inductance?
A: To calculate the number of turns (N), use the formula: N = √(L / AL), where L is your target inductance in nanohenries and AL is 4.5 nH/N². For example, to achieve 100 nH: N = √(100 / 4.5) ≈ 4.7, so approximately 5 turns would be needed.
Q: Is this core suitable for power supply applications?
A: Yes — the T50-2 can be used in power chokes and EMI filtering circuits, though it is most optimized for RF frequencies in the 2–30 MHz range. For lower-frequency power supply applications or audio frequencies, a higher-permeability mix (such as Mix-26 or Mix-52) may be more appropriate.