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Products » Iron Based Powder Cores » Powder Iron Ring Shaped Cores »

Powder Iron Ring Shaped Cores

Rings produced on the base of iron powder are widely used and produced with sizes 3,5...165 mm. Such Iron powder cores are produced under the pressure. The distributed gap fis being formed due to ferrum particles are separated from each other that provides high values of saturation induction of the powder material.

Despite the fact that the iron powder cores have value of losses (800mW/sm3 , (F=100kHz, B=0,05T)) and they can't compete with other classes of powder materials such as Kool M, MPP, High Flux, XFlux one important advantage of such cores should be mentioned. Due to the cheapness of a composition ( 100% Fe) iron powder cores are characterised by low price comparing to other powder materials. For choosing of powder material it is recommended to apply to the Magnetics materials row.

Example of designation in design documentation:

K52 R57,2*35,7*25,4 DT225-52B, where:

DT — ring shaped core
225 — core’s standard size
52 — powder material’s brand

Color Codes of Cores

Each powder material has own coating color.

Material’s Number Permeability (µe) Temperature Stability (ppm/С) Color Codes of Cores
-2 10 95 Red / transparent
-8 35 255 Yellow / red
18 55 385 Green / red
-26 75 825 Yellow / white
-28 22 415 Sky-blue
-33 33 635 grey
-34 33 565 Grey / light-blue
-35 33 665 Yellow / grey
-38 85 955 black
-40 60 950 Green / yellow
-45 100 1043 Black / black
-52 75 650 Light-green / light-blue

Permissible Dispersions on AL and Geometrical Dimensions

Tolerances on dispersions of geometrical dimensions (after coating) for powder iron ring-shaped cores:

Codes of Standard Size OD
mm
ID
mm
HT
mm
DT14~DT72 ±0.50 ±0.50 ±0.50
DT80~DT141 ±0.50 ±0.50 ±0.50
DT150~DT225 ±0.64 ±0.64 ±0.76
DT249~DT400 ±0.76 ±0.76 ±0.76
DT520~DT650 ±1.27 ±1.27 ±1.27

Tolerances on dispersions of single-turn inductance coefficient AL for powder iron based ring-shaped cores:

Material’s Number -2 -8, 18, -26, -28, -33, -34, -35, -38, -40, -45, -52
Dispersion on AL ±5% ±10%

Nomenclature List of Powder Iron Ring-shaped Cores

Nomenclature list of powder iron based ring-shaped cores may be downloaded here (ru).

Order code Geometrical Dimensions Effective Parameters
OD
mm
ID
mm
HT
mm
L
cm
Ae
cm²
Ve
cm³
DT650-XX 165 88.9 50.8 39.9 18.4 734
DT520-XX 132 78.2 20.3 33.1 10.5 347
DT400-XXD 102 57.2 33 25 6.85 171
DT400-XXB 102 57.2 25.4 25 5.35 133
DT400-XX 102 57.2 16.5 25 3.46 86.4
DT300-XXD 77.2 49 25.4 19.8 3.38 67
DT300-XX 77.2 49 12.7 19.8 1.68 33.4
DT252-XX 64 40 32 16.3 3.65 59.56
DT250-XXB 63.5 31.8 38.1 15 5.74 86.09
DT250-XXA 63.5 31.8 12.7 15 1.92 28.7
DT250-XX 63.5 31.8 25.4 15 3.84 57.4
DT249-XX 63.5 35.7 25.4 15.6 3.36 52.3
DT225-XXC 57.2 35.7 18.5 14.58 1.89 27.56
DT225-XXB 57.2 35.7 25.4 14.6 2.59 37.8
DT225-XX 57.2 35.7 14 14.6 1.42 20.7
DT224-XX 57.2 31.8 19.1 14 2.31 32.2
DT201-XX 50.8 24.1 22.2 11.8 2.81 33.2
DT200-XXB 50.8 31.8 25.4 13 2.32 30
DT200-XX 50.8 31.8 14 13 1.27 16.4
DT184-XX 46.7 24.1 18 11.2 1.88 21
DT175-XX 44.5 27.2 16.5 11.2 1.34 15
DT157-XX 39.9 24.1 14.5 10.1 1.06 10.7
DT150-XXA 38.4 21.5 8.26 9.38 0.657 6.16
DT150-XX 38.4 21.5 11.1 9.38 0.887 8.31
DT141-XX 35.9 22.4 10.5 9.14 0.674 6.16
DT132-XXB 33 17.8 15.4 7.96 1.17 8.89
DT132-XXA 33 17.8 7.92 7.96 0.574 4.57
DT132-XX 33 17.8 11.1 7.96 0.805 6.41
DT131-XX 33 16.3 11.1 7.72 0.885 6.84
DT130-XXA 33 19.8 5.72 8.28 0.361 2.99
DT124-XX 31.6 18 7.11 7.75 0.459 3.55
DT108-XX 27.5 13.5 11.5 6.44 0.76 4.92
DT106-XXB 26.9 14.5 14.6 6.49 0.858 5.57
DT106-XXA 26.9 14.5 7.92 6.49 0.461 3
DT106-XX 26.9 14.5 11.1 6.49 0.659 4.28
DT95-XXB 23.9 12.6 9.53 5.72 0.51 2.91
DT94-XX 23.9 14.2 7.92 5.97 0.362 2.16
DT93-XXA 23.9 12 6 5.636 0.339 1.91
DT93-XX 23.9 12 9.5 5.64 0.54 3.03
DT91-XX 23 11 8 5.34 0.46 2.43
DT90-XXB 22.9 14 11.2 5.78 0.464 2.68
DT90-XXA 22.9 14 4.5 5.78 0.19 1.1
DT90-XX 22.9 14 9.53 5.78 0.395 2.28
DT80-XXD 20.2 12.6 12.7 5.14 0.453 2.33
DT80-XXB 20.2 12.6 9.53 5.14 0.347 1.78
DT80-XX 20.2 12.6 6.35 5.14 0.231 1.19
DT72-XXB 18.3 7.11 8.2 4.01 0.434 1.74
DT72-XX 18.3 7.11 6.6 4.01 0.349 1.4
DT68-XXD 17.5 9.4 9.53 4.23 0.358 1.52
DT68-XXC 17.5 9.4 5.1 4.23 0.194 0.828
DT68-XXB 17.5 9.4 8.7 4.23 0.333 1.41
DT68-XXA 17.5 9.4 6.35 4.23 0.242 1.03
DT68-XX 17.5 9.4 4.83 4.23 0.179 0.759
DT60-XXD 15.2 8.53 11.9 3.74 0.374 1.4
DT60-XXB 15.2 8.53 7.25 3.74 0.228 0.853
DT60-XX 15.2 8.53 5.94 3.74 0.187 0.699
DT57-XXA 14.6 6.93 6.68 3.38 0.239 0.805
DT57-XX 14.6 6.93 4.98 3.38 0.178 0.601
DT51-XXC 12.7 5.08 6.35 2.79 0.223 0.622
DT51-XXB 12.7 5.08 7.92 2.79 0.282 0.786
DT50-XXE 12.7 7.7 5.46 3.19 0.128 0.407
DT50-XXD 12.7 7.7 9.53 3.19 0.223 0.711
DT50-XXC 12.7 7.7 8.51 3.19 0.2 0.637
DT50-XXB 12.7 7.7 6.35 3.19 0.148 0.471
DT50-XX 12.7 7.7 4.83 3.19 0.112 0.358
DT44-XXD 11.2 5.82 8.59 2.68 0.219 0.587
DT44-XXC 11.2 5.82 6.35 2.68 0.157 0.434
DT44-XXB 11.2 5.82 4.67 2.68 0.119 0.319
DT44-XX 11.2 5.82 4.04 2.68 0.099 0.266
DT40-XX 10.2 5.21 4.14 2.41 0.093 0.223
DT38-XXB 9.53 4.45 5.6 2.18 0.132 0.287
DT38-XX 9.53 4.45 4.83 2.18 0.114 0.248
DT37-XXD 9.53 5.21 7 2.31 0.138 0.319
DT37-XXC 9.53 5.21 2.44 2.31 0.048 0.111
DT37-XXB 9.53 5.21 5 2.31 0.098 0.226
DT37-XX 9.53 5.21 3.25 2.31 0.064 0.147
DT32-XX 8.31 4.29 4.01 1.91 0.081 0.154
DT30-XXF 7.8 3.84 2.28 1.84 0.043 0.077
DT30-XX 7.8 3.84 3.25 1.84 0.06 0.11
DT27-XX 7.11 3.84 3.25 1.71 0.047 0.08
DT26-XXA 6.73 2.67 3.9 1.47 0.073 0.107
DT26-XX 6.73 2.67 4.83 1.47 0.09 0.133
DT25-XXF 6.48 3.05 3.17 1.5 0.048 0.073
DT25-XXC 6.48 3.05 1.79 1.5 0.027 0.041
DT25-XXB 6.48 3.05 3.25 1.5 0.049 0.074
DT25-XX 6.48 3.05 2.44 1.5 0.037 0.055
DT20-XX 5.08 2.24 1.78 1.15 0.023 0.026
DT16-XX 4.06 1.98 1.52 0.93 0.015 0.014
DT14-XXA 3.43 1.7 1.52 0.81 0.012 0.0098
 
NORTH-WESTERN LABORATORY: NEWS
 
05.06 09 
Epcos has developed a new N95 power ferrite material with an exceptionally low power loss.



12.05 09 
New Epcos ferrite ring core sizes : N87 R20*12*6 and N87 R28*16*9



02.02 09 
New Epcos ferrite E core size : N87 E16/8/7,8 B66502GX187



 
 


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