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 common-mode 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 common-mode interferences. Among main fields of application one can mention:power supplies and other industrial equipment operating at high current values.

I core Chokes

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

Ring core chokes with iron powder core

Design	Nominal voltage (V AC)	Номинальный ток (A)	Inductance (μH)	Series
	250	1 - 6	700 - 20000	B82615
	250	0,3 - 3	33 - 1200	B82623
	250	1 - 5	250 - 5000	B82625
Chokes with ordering codes B82617*, B82624*and B82627* are not produced

Sine-wave chokes

Design	Nominal voltage(V AC)	Nominal current (A)	Inductance (μH)	Series
	250	0,8 - 2,7	500 - 3000	B82614

Current-compensated ring core chokes

in order to provide the EMC standards and required quality of electrical power for protection from common-mode interferences with high value of effective inductance. The best and unexpensive solution for EMI suppression is the using of current-compensated 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 common-mode interference.

Current -compensated ring core double chokes

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

Current -compensated ring core triple chokes

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

Current -compensated ring core quat chokes

Design	Nominal voltage (V AC)	ominal current (A)	Inductance (μH)	Series
	440/250	16 - 75	900 - 1800	B82765C

Current -compensated U core double chokes

design	Nomimal voltage (V AC)	Nominal current (A)	inductance (μH)	Series
	300	0,4 - 2,6	330 - 1500	B82730U/G horizontal and vertical versions

Current -compensated D core double chokes

Design	Nominal voltage (V AC)	Nominal current (A)	Inductance (μH)	Series
	250	0,35 - 1,8	3300 - 100 000	B82731M/H
	250	0,4 - 2,2	3300 - 100 000	B82732R/W
	250	0,7 - 4,6	3300 - 68 000	B82734R/W

Current -compensated E core double chokes

Design	Nominal voltage (V AC)	Nominal current (A)	Inductance (μH)	Series
	250	0,3 - 1,8	3300 - 100 000	B82731T

Current-compensated frame core double chokes

The disadvantage of many current-compensated 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 current-compensated frame core double chokes B82732F* and B82733F* protecting both from common mode and differential interferences.

Current-compensated frame core double chokes

Design	Nominal voltage (V AC)	nominal current (A)	inductance (μH)	Series
	250	0,45 - 1,6	10 000 - 100 000	B82732F
	250	0,7 - 2,3	10 000 - 100 000	B82733F

In 2015 Epcos-TDK 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 current-compensated 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.

New series B82733F/V

Drawing	Series	Sizes, mm (V AC)	Nominal current, (A)	Nominal resistance, (mOhm)	Номинальная индуктивность, (mH)
	B82733V	29 x 15.5 x 27	0,7 - 2,3	188 - 1810	10 - 100
	B82733F	26.5 x 24.8 x 14

The main fields of power current-compensated chokes application: electronic ballasts and led drivers, industrial electronics, SMPS in home appliance and different pulse circuits.

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