Material Characteristics

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Material Characteristics

General Material Properties for RF Materials
Material Mix No.	Basic Iron Powder	Material Permeability (µ°)	Temperature¹Stability (ppm /°C)	Relative Cost	Toroidal Color Code
-1	Carbonyl C	20	280	2.7	Blue/Clear
-2	Carbonyl E	10	95	1.7	Red/Clear
-3	Carbonyl HP	35	370	2.5	Grey/Clear
-4	Carbonyl J	9.0	280	2.0	Blue/White
-6	Carbonyl SF	8.5	35	2.0	Yellow/Clear
-7	Carbonyl TH	9.0	30	2.0	White/Clear
-8	Carbonyl GQ4	35	255	2.5	Orange/Clear
-10	Carbonyl W	6.0	150	4.7	Black/Clear
-12*	Carbonyl Oxide	4.0	170**	1.5	Green/White
-15	Carbonyl GS6	25	190	3.1	Red/White
-17	Carbonyl	4.0	50	3.1	Blue/Yellow
-42	Hydrogen Reduced	40	550	1.4	Blue/Red
-0	Phenolic	1	0	1.0	Tan/Tan
¹Temperature stability values, averaged from -55C° to +125C° are listed for closed magnet structures. Non-linear *Mix 17 was developed as a temperature stable alternative to mix 12 and is recommended for all new designs. Note: For information an Mix #'s 8, 18, 26, 28, 33, 40 and 52 see Micrometals Catalog 4 for Power Conversion and Line Filter Applications.

Resonant Circuit¹ (****) and Broadband Frquency Range (-----)

Mix No.
Range MHz
2KHz to 50KHz

50KHz to 250KHz

250KHz to 500KHz

500KHz to 2MHz

2MHz to 10MHz

10MHz to 40MHz

40MHz to 150MHz

150MHz to 250MHz

250MHz to 500MHz

500MHz to 1GHz

42

0.3-80
******

3

.02-1
************************

8

.02-1
************************

-----------------

1

.15-3

************************

-----------

15

.15-3

************************

2

.25-10

****************************

7

1-25

********************

4

3-40

*************

6

3-40

*************

-----------

10

15-100

************

-----------

17

20-200

******************

12

30-250

******************

0

50-350

***************** --

------

*Resonant frequency range is given to optimize Q and core loss.
Materials can be used outside resonant frequency range where optimum Q is not required.

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