Softmagnetic Core Materials | SoftProtector® Cores

SoftProtector® Cores to suppress damaging unbalanced currents

Modern high-power, frequency converter operated systems, especially those that are operated at very high switching frequencies, cause harmful interference currents which, among other things, groove and destroy the bearings of motors as so-called bearing currents. Systems stop unexpectedly, communication problems can arise, the function of sensors can be affected, and even motor terminals can wear out. By using easy-to-retrofit SoftProtector® Cores, such a malfunction can be reduced to a minimum so that your system can be operated with a calculable maintenance cycle.

It may also be possible to switch from hybrid bearings to conventional steel bearings. The SoftProtector® Cores absorb the harmful high-frequency part of the interference current and convert it into thermal energy, which can be released without damage via the core surface. When placed correctly, you not only protect the bearings of your engine, but also the entire system.

SoftProtector® Cores are working as single turn common mode choke and reduce the asymmetrical radio frequency noisecurrent without affecting the symmetrical power current.

Technical specifications:

Types / Reference Nom. Dimensions [mm] Finished Dimensions [mm] Lfe
(cm)		 Afe
(cm²)		 AL nom. @10kHz / 100kHz [μH] Finishing
OD  ID  H OD   ID H   5.000μ     30.000μ    60.000μ
NO5040- MRCxxx 50 40 20 60,7/40,7 42,7/24,8 22,3 14,14 0,76 MRC557 3,3/2,2 MRC357 20,2 / 8,5 MRC057 40,5/14,1 oval cased
NO6350- MRCxxx 63 50 30 82,7/45,5 57,5/20,9 33 17,75 1,48 MRC558 5,2/3,4 MRC358 31,4/13,2 MRC058 62,9/22,0 oval cased
FS6556- MRCxxx 65 45 30 70 40 35 17,72 2,40 MRC589 8,3/5,2 MRC389 50,0/ 26,0 MRC089 90,0/40,0 cased
NO8063- MRCxxx 80  63 30 101/62 68/28 36 22,46 1,94 MRC559 5,4/3,6 MRC359 32,5/13,6 MRC059 65,0/22,7 oval cased
NO10575 MRCxxx 105 75 30 111 70 35 28,27 3,42 MRC546 7,6/5,0 MRC346 45,6/25,9 MRC046 136,8/36,9 cased
NO10080 MRCxxx 100 80 30 130/66 94/30 36,6 28,16 2,25 MRC596 5,1/2,9 MRC396 30,4/17,3 MRC096 60,8/25,5 oval cased
FS130100- MRCxxx 130 100 30 135 95 36 36,13 3,42 MRC560 5,9 / 3,9 MRC360 35,6/14,9 MRC060 71,3/24,9 cased
NO132104- MRCxxx  132  104 20 172/78 131/37 25 37,23 2,20 MRC550 3,7/2,4 MRC350 22,3/9,3  MRC050  44,6/15,6  oval cased
FS140100- MRCxxx 140  100 25 144 96 31 37,70 3,80 MRC567 6,3/4,2 MRC367 38,0/15,9 MRC067 76,0/26,6  cased
FS160130 MRCxxx 160  130 25 165 125 30 45,55 2,85 MRC561 3,9/2,6 MRC361 23,5/9,9 MRC061 47,1/16,5  cased
NO160130- MRCxxx 160 130 30 197/11 155/69 36 45,55 3,42 MRC562 4,7/3,1 MRC362 28,3/11,8 MRC062 56,6/19,8  oval cased
NO160130- MRCxxx  160 130 30 165 125 36 45,55 3,42 MRC551 4,7/3,1 MRC351 28,3/11,8 MRC051 56,6/19,8  cased
NO170120- MRCxxx 170  120 25 175 114,1 31 45,55 4,75 MRC552 6,5/4,3  MRC352 39,3/16,5 MRC052 78,6/27,5  cased
FS210170- MRCxxx 210 170 30 217 163 37 59,60 4,68 MRC553 3,7/2,5 MRC353 22,4/14,9 MRC053 62,4/15,6  cased
FS270210- MRCxxx 270  210 25 277 204 31 75,36 6,08 MRC595 4,75/2,8  MRC395 28,5/16,2 MRC095 57/24 cased
NO237200- MRCxxx 237 200 30 305/147 249/95 37 68,64 4,22 MRC555 3,8/2,5  MRC355 23,1/9,7  MRC055 46,3/16,2  oval cased
NO300250- MRCxxx 300 250 30 392/160 326/94 37 87,02 5,24 MRC556 3,9/2,3  MRC356 22,7/9,5  MRC056 45,4/15,9  cased

The information is not binding and can be adjusted without prior information. 

Example of a bearing damage:

Without SoftProtector® Core (left) | With SoftProtector® Core (right)

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Important note: For safety and the proper usage, you are requested to approve the offered product specification for your application. These products are designed for general electronic devices. Performance and safety of this product for applications which could lead to physical harm is not confirmed. Be sure to examine the performance and safety when the product is used for these applications and take appropriate measures, such as failsafe, to avoid any accident. It is the responsibility of user to take such measures.