Core Conversations Blog
Keyword Search:

Magnetics Powder Cores: Kool Mu Cores

Kool M<#181; Cores

Kool Mµ® material’s low loss and relatively high saturation level (10,500 gauss) make it excellent for use in power factor correction circuits (PFC) as well as unidirectional drive applications such as Pulse Transformers and Flyback Transformers. The near zero magnetostriction makes Kool Mµ ideal for eliminating audible frequency noise in In-Line Noise Filters and Inductors.

Learn more about Kool Mu cores including applications and the advantages of Kool Mu cores versus Powdered Iron and gapped ferrite E cores.

View Kool Mµ Material Property Curves including; Normal Magnetization curves, Core Loss Density curves, Permeability versus Temperature curves, Permeability versus DC Bias curves, Permeability versus AC Flux, and Permeability versus Frequency curves.                                        

Kool Mu Toroid


 AL nH/T2 (nominal)





 
Core
Data 		26µ 40µ 60µ 75µ 90µ 125µ Le
Path
Length
mm 		Ae
Cross
Section
mm2 		Ve
Volume
mm3 		OD
max
mm 		ID
min
mm 		HT
max
mm 		 
140

13 16 19 26 8.06 1.30 10.48 4.19 1.27 2.16  
150

17
25 35 9.42 2.11 19.88 4.57 1.73 3.18  
180

20
30 42 10.62 2.85 30.27 5.11 2.03 3.18  
020

24 30 36 50 13.61 4.82 65.6 6.99 2.29 3.43  
240



39 54 13.63 4.76 64.9 7.06 2.16 3.00  
270

50 62 74 103 13.63 9.12 124.3 7.24 2.16 5.41  
410



50 70 16.5 7.25 119.6 7.32 3.63 5.72  
030

25 31 37 52 17.9 6.02 107.8 8.51 3.45 3.81  
280

25 32 38 53 21.8 7.51 163.7 10.3 4.27 3.81  
290

32
48 66 21.8 9.45 206 10.3 4.27 4.60  
040

32
48 66 23 9.76 225 10.8 4.57 4.60  
130

26 32 38 53 26.9 9.27 249 11.8 5.84 4.60  
050 12
27 34 40 56 31.2 11.70 365 13.5 6.99 5.51  
120

35 43 52 72 41.2 19.56 806 17.3 9.53 7.11  
380

43 53 64 89 41.4 23.20 960 18.0 9.02 7.11  
206
21 32 41 49 68 50.9 23.47 1,194 21.1 12.1 7.11  
310 19 29 43 54 65 90 56.7 32.85 1,863 23.6 13.3 8.4  
350 22 34 51 63 76 105 58.8 38.80 2,281 24.3 13.8 9.7  
930 32 50 75 94 113 157 65.4 66.1 4,322 27.7 14.1 11.9  
548 28 41 61 76 91 127 81.4 67.7 5,509 33.8 19.3 11.4  
585 16 25 38 47 57 79 89.5 47.1 4,215 35.2 22.6 9.8  
324 24 37 56 70 84 117 89.8 68.3 6,136 36.7 21.5 11.4  
254 35 54 81 101 121 168 98.4 110.6 10,880 40.8 23.3 15.4  
089 37 57 86 107 128 178 116.3 133.3 15,502 47.6 27.9 16.1  
438 59 90 135 169 202 281 107.4 197.7 21,235 47.6 23.3 18.9  
715 32 49 73 91 109 152 127.3 124.4 15,832 51.7 30.9 14.4  
109 33 50 75 94 112 156 143 146.3 20,918 58.0 34.7 14.9  
195 60 92 138 172 207 287 125 229 28,625 58.0 25.6 16.1  
 620  82  126  189  237  284  394  144  360  51,840  62.9  31.7  25.9  
 740  88  136  204  255  306  425  184  497  91,400  75.0  44.4  35.9  
866 30 45 68


199.5 176 35,112 78.9 48.2 13.8  
906 37 57 85


199.5 227 45,287 78.9 48.2 17.0  
 102  48  74  111      232  243  358  86,944  103.0  55.75  17.9  
 337  68    
        324  678 220,000  134.0  77.19  26.8  
 165  78            412  987 407,000  166.5  101.0  33.15  

Kool Mu E Core


 AL nH/T2 (nominal)





Core Data 26µ 40µ 60µ 90µ Le
Path
Length
mm		 Ae
Cross
Section
mm2		 Ve
Volume
mm3		 Length
max
mm		 Leg
Length
min
mm		 Height
max
mm
1808 26 35 48 69 40.1 22.8 914 19.6 8.28 4.93
2510 39 52 70 100 48.5 38.5 1,867 25.8 9.70 6.45
3007 40 54 75 106 65.6 60.1 3,943 30.6 15.2 7.21
3515 56 75 102 146 69.4 84 5,830 35.1 14.4 9.53
4017 56 76 105 151 98.4 128 12,595 43.5 21.4 11.0
4020 80 108 150 217 98.4 183 18,007 43.5 21.4 15.7
4022 104 140 194 281 98.4 237 23,321 43.5 21.4 20.3
4317 88 119 163 234 77.5 152 11,800 41.5 16.8 12.7
5528 116 157 219 322 123 350 43,050 55.7 28.0 21.0
5530 138 187 261 338 123 417 51,291 55.7 28.0 25.0
6527 162 230 300
147 540 79,380 66.4 32.9 27.4
7228 130 173 236
137 368 50,416 73.5 28.4 19.4
8020 103 145 190
185 389 71,965 81.2 38.7 20.2
8044 91


208 389 80,912 80.9 45.2 20.2
130LE 254


219 1080 236,520 134.1 32.8 55.1
160LE 180


273 778 212,394 162.6 38.7 40.9

Kool Mu U Core


 AL nH/T2 (nominal)





Core Data 26µ 40µ 60µ 90µ Le
Path
Length
mm		 Ae
Cross
Section
mm2		 Ve
Volume
mm3		 Length
max
mm		 Leg
Length
min
mm		 Height
max
mm
3112

111
65.6 101 6,620 31.8 11.4 12.4
4110

77.5
85.2 80 6,816 41.1 11.7 9.91
4111

95
85.2 101 8,605 41.1 11.4 12.4
4119
110 151 218 85.2 160 13,632 41.1 11.4 19.4
5527 67


168 172 28,896 55.5 28.1 16.6
5529 85


168 244 40,992 55.5 28.1 23.5
6527 89
165
219 270 59,130 66.5 32.8 27.4
6533 82


199 250 49,750 66.5 32.8 20.4
7228 130


137 368 50,416 73.5 28.4 19.4
7236 87


219 290 63,510 73.3 36.2 21.2
8020 64


273 195 53,235 80.9 38.7 20.2
8038 97
179
237 354 83,898 80.9 38.7 23.4

Kool Mu Segment


 AL nH/T2 (nominal)





Core Data 26µ 40µ 60µ 90µ Le
Path
Length
mm		 Ae
Cross
Section
mm2		 Ve
Volume
mm3		 OD
mm		 ID
mm		 HT
mm
102TC 47.9


242.7 356 47,900 101.6 57.2 16.51
102RT 29.8


357 356 29,800 101.6 57.2 16.51
102AR -







16.51
102IS -







16.51
133TC 67.4


324.3 669 67,400 132.5 78.6 25.4
133RT 45.9


476.7 669 45,900 132.5 78.6 25.4
133AR -







25.4
133IS -







25.4

Kool Mu Block


 AL nH/T2 (nominal)





Core Data 26µ 40µ 60µ 90µ Le
Path
Length
mm		 Ae
Cross
Section
mm2		 Ve
Volume
mm3		 Length
mm		 Width
mm		 Height
mm
4741





53,600 47.5 41.0 27.5
5528





31,200 54.9 27.6 20.6
6030





27,000 60.0 30.0 15.0
8030    
 
     85,400 80.5 30.3 35.0
Each Magnetics part has a unique ordering code that identifies material, shape, size and finish.  Below is  an overview of the ordering code for Kool Mµ cores.

Kool Mu Order Code