IRON POWDER CORES
Iron Powder Cores are made in numerous shapes and sizes: such as Toroidal Cores, E- cores, Shielded Coil Forms, Sleeves etc., each of which is available in many different materials. There are two basic groups of iron powder material: (1) The Carbon Iron and, (2) The Hydrogen Reduced Iron.
The Carbonyl iron cores are especially noted for their stability over a wide range of temperatures and flux levels. Their permeability range is from less than 3 µi to 35 µi and can offer excellent 'Q' factors from 50 KHz to 200 MHz. They are ideally suited for a variety of RF applications where good stability and good 'Q' are essential. Also, they are very much in demand for broadband inductors, especially where high power is concerned.
The Hydrogen Reduced Iron cores have higher permeabilities ranging from 35µi to 90 µi. Somewhat lower 'Q' can be expected from this group of cores. They are mainly used for EMI filters and low frequency chokes. They are also very much in demand for input and output filters for switched mode power supplies.
The features of Iron Powder Cores
- high maximum flux density
- large energy storage capacity
- low cost, most economical for DC and low frequency applications
Application: High Frequency Chokes; Output Chokes for Switching Power Supplies; Conducted EMI Noise Filters; Pulse Transformers; DC Output/Input Filters; Light Dimmer Chokes; PFC Inductors; Continuous-mode Fly-back Inductors.
Characteristic Curve of the Metallic Powder Core
