The operation of a modern equipment is connected with EMI.
EPCOS AG offers a large choise of power chokes with different configurations (Chokes for Power Line) destined for commonmode and differential interferences suppression in Power supplies and other industrial equipment and home appliances.
EPCOS power line chokes represent a component with a ferrite core with a winding on a plastic case. When chokes producing I, E, Rings and D cores are used. Such chokes are aplied for differential and commonmode interferences. Among main fields of application one can mention:power supplies and other industrial equipment operating at high current values.
Design  nominal voltage (V AC)  Niminal current (A)  Inductance (μH)  Series 
500  0,2  2  680  82000  B82502W  
400  0,5  15  25  47000  B82503U*E  
500  1  25  65  27000  B82504W  
500  4  40  56  5600  B82505W  
500  6  95  15  5000  B82506W  
500  0,1  2  330  68000  B82522V  
400  0,5  10  33  15000  B82523T*E  
Chokes with ordering codes B82503U*A and B82523T* are not produced! Instead of this series one can use B82503U*E and B82523T*E 
Design  Nominal voltage(V AC)  Nominal current (A)  Inductance (μH)  Series 
250  0,8  2,7  500  3000  B82614 
Currentcompensated ring core chokes
in order to provide the EMC standards and required quality of electrical power for protection from commonmode interferences with high value of effective inductance. The best and unexpensive solution for EMI suppression is the using of currentcompensated ring core double chokes.
The problem of core material saturation due to the operating current is solved in these designs by winding two windings with equal numbers ofturns on the core. These windings are connected in such a way that the magnetic flux induced by the operating current flowing in the upper winding is opposite to that induced by the current flowing through the lower winding, so that the two fluxes cancel, i.e. compensate one another. This enables the use of highly permeable ring cores, so that high inductance ratings per winding are obtained. when current compensated chokes with ferrite cores are used the full inductance attenuates commonmode interference.
Design  Nominal voltage (V AC)  Nominal current (A)  Inductance (μH)  Series 
250  0,3  2  1100  22000  B82720S  
250  0,25  0,9  4700  47000  B82791G/H  
250  0,3  2  1100  22000  B82720A/K  
250  0,3  6  200  47000  B82721A, B82721J, B82721K 

250  0,3  3  1200  68000  B82722A, B82722J  
250  0,5  6  1000  56000  B82723A, B82723J  
250  0,5  6  1000  82000  B82724A, B82724J  
250  0,5  6  1800  100000  B82724B  
250  1  16  560  82000  B82725A  
250  1  10  1800  68000  B82725J  
250  6  10  2800  7800  B82725S2*  
250  10  12  2200  3300  B82726S61*3N  
250  16  1400  2200  B82726S2163N  
250  18  1300  B82726S2183N  
250  20  24  750  1600  B82726S22*3A  
300  54  190  B82726S3543N 
Design  Nominal voltage (V AC)  Nominal current (A)  Inductance (μH)  Series 
440/250  12  350  B82745S6123N  
520/300  10  1700  B82746S4103  
520/300  20  1300  B82747S4203  
440/250  18  1800  B82747S4183N  
440/250  31  950  B82747S6313N  
440/250  42  1500  B82747S4423N  
690/400  62  1100  B82748S6623N  
690/400  23  1500  B82748F6233N  
440/250  6  25  1300  6000  B82747F  
440/250  50  200  120  1300  B82745C 
Design  Nominal voltage (V AC) 
ominal current (A)  Inductance (μH)  Series 
440/250  16  75  900  1800  B82765C 
design  Nomimal voltage (V AC) 
Nominal current (A)  inductance (μH)  Series 
300  0,4  2,6  330  1500  B82730U/G horizontal and vertical versions 
Design  Nominal voltage (V AC) 
Nominal current (A)  Inductance (μH)  Series 
250  0,3  1,8  3300  100 000  B82731T 
Currentcompensated frame core double chokes
The disadvantage of many currentcompensated chokes is a weak filtering of differential interferences. This leads to additional using of capacitors and differential chokes (for instance chokes on the base of drum powder ring cores). The easy solution is the using of new series of currentcompensated frame core double chokes B82732F* and B82733F* protecting both from common mode and differential interferences.
In 2015 EpcosTDK expanded the range of power chokes new vertical version B82733 with frame. Components with vertical performance B82733V are more compact in comaprance with horizontal version B82733F, that allows to use them in circuits, where the place for each component is limited. New currentcompensated chokes are suitable for operating at voltage 300 V(AC) and inductance values are in the range 10mH 100mH. The components can operate at 0.7А  2.3А and T=40°С. On account of stray inductance is about 2%, chokes B82733F/V are suitable for suppression of differetial interference in SMPS and high sensitive converters without using of additional components.
The main fields of power currentcompensated chokes application: electronic ballasts and led drivers, industrial electronics, SMPS in home appliance and different pulse circuits.
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