Power line chokes
Current-compensated ring core double chokes
250 V AC, 4.7 … 47 mH, 0.25 … 1.0 A, +40 °C / +60 °C / +70 °C
Series/Type:
B82791G/H/K
Date:
December 2023
TDK Electronics AG 2023. Reproduction, publication and dissemination of this publication, enclosures hereto
and the information contained therein without TDK Electronics’ prior express consent is prohibited.
Power line chokes
Current-compensated ring core double chokes
B82791G/H/K
Rated voltage 250 V AC
Rated current 0.25 A ... 1.0 A / +40 °C, +60 °C, +70 °C
Nominal inductance 4.7 mH ... 47 mH
Construction
Current-compensated ring core double choke
MnZn Ferrite core with epoxy coating (UL 94 V-0)
Plastic case (UL 94 V-0)1) with in-molded pins
Sector winding
Clearance and creepage distances 3 mm
B82791G
Features
Very compact design, suitable for post-design EMC tuning
on finished PCB
Types with increased inductance per current ratio (B82791K2*A040)
High resonance frequency due to special
winding technique and omission of potting
Up to 1.7% stray inductance
for symmetrical interference suppression
Suitable for wave soldering
Design complies with EN 60938-2 (VDE 0565-2)
UL2) and ENEC (VDE) approvals
RoHS-compatible
B82791H
Applications
Suppression of common-mode interferences
Electronic ballasts in lamps and LED driver circuits
Compact switch-mode power applications
B82791K
Terminals
Base material CuNi18Zn20
Layer composition Ni, Sn
Hot-dipped
Pins 0.6 mm
Lead spacing 10 15 mm or 12.7 5.08/2.54 mm
Marking
Product brand (EPCOS), ordering code, approval signs, graphic symbol, rated inductance, rated
current, rated voltage, date of manufacture (YYWWD), production place identification code
Delivery mode
Cardboard box
Delivery in tube magazine is available on request for B82791H* or B82791K*
1) Additionally certified values:
Glow wire flammability index (GWFI to IEC 60695-2-12):+850 °C
Glow wire ignition temperature (GWIT to IEC 60695-2-13):+775 °C
Comparative tracking index (CTI to IEC 60112):175 V
Ball pressure test (BP to IEC 60695-10-2):+125 °C
2) UL approval with 300 V AC.
Please read Cautions and warnings and
Important notes at the end of this document.
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Power line chokes
Current-compensated ring core double chokes
Dimensional drawings and pin configurations
Horizontal version (B82791G)
Vertical version (B82791H)
Please read Cautions and warnings and
Important notes at the end of this document.
3
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B82791G/H/K
Power line chokes
Current-compensated ring core double chokes
Vertical version (B82791K)
Please read Cautions and warnings and
Important notes at the end of this document.
4
12/23
B82791G/H/K
Power line chokes
Current-compensated ring core double chokes
B82791G/H/K
Technical data and measuring conditions
Rated voltage VR
250 V AC (50/60 Hz)
Test voltage Vtest
1500 V AC, 2 s (line/line)
Rated temperature TR
+40 °C, +60 °C or +70 °C
Rated current IR
Referred to 50 Hz and rated temperature
Nominal inductance LN
Measured with Agilent 4284A at 10 kHz, 0.1 mA, +20 °C
Inductance is specified per winding.
Inductance tolerance
–30/50% at +20 °C
Inductance decreaseL/L0
< 10% at DC magnetic bias with IR, +20 °C
Stray inductance Lstray,typ
Measured with Agilent 4284A at 10 kHz, 5 mA, +20 °C,
typical values
DC resistance Rtyp
Measured at +20 °C, typ. values, specified per winding
Solderability (lead-free)
Sn96.5Ag3.0Cu0.5: +(245 5) °C, (3 0.3) s
Wetting of soldering area 95%
(to IEC 60068-2-20, test Ta)
Resistance to soldering heat
(wave soldering)
+(260 5) °C, (10 1) s
(to IEC 60068-2-20, test Tb)
Climatic category
40/125/56 (to IEC 60068-1)
Storage conditions (packaged)
–25 °C … +40 °C, 75% RH
Weight
Approx. 3 g
Approvals
IEC EN 60938-2, UL 1283
Please read Cautions and warnings and
Important notes at the end of this document.
5
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Power line chokes
Current-compensated ring core double chokes
B82791G/H/K
Characteristics and ordering codes
Approvals
IR
LN
Lstray,typ Rtyp
TR
A
mH
H
m
°C
Ordering code
Horizontal version
0.25
47
600
2400
+40
B82791G2251N020 B82791H2251N020
0.3
30
500
2200
+40
B82791G2301N001 B82791H2301N001
0.35
22
400
1900
+40
B82791G2351N001 B82791H2351N001
0.4
15
250
1350
+40
B82791G2401N001 B82791H2401N001
0.5
10
170
1000
+40
B82791G2501N001 B82791H2501N001
Vertical version1)
0.6
6.8
120
630
+40
B82791G2601N001 B82791H2601N001
0.7
4.7
75
440
+40
B82791G2701N001 B82791H2701N001
0.9
4.7
55
250
+60
B82791G2901N020 B82791H2901N020
1) Vertical versions with symmetrical lead spacing (B82791K) are available on request
= approval granted
P = pending
Types with increased current capability
Approvals
°C
Ordering code1)
Vertical version K
IR
LN
Lstray,typ Rtyp
TR
A
mH
H
0.7
10
1.0
4.8
m
85
330
+70
B82791K2701A040
–
P
30
185
+70
B82791K2102A040
–
P
1) Vertical versions with asymmetrical lead spacing (B82791H) and horizontal version
(B82791G) are available on request
= approval granted
P = pending
Please read Cautions and warnings and
Important notes at the end of this document.
6
12/23
Power line chokes
Current-compensated ring core double chokes
Impedance |Z| versus frequency f
measured with windings in parallel at +20 °C,
typical values
Ω
Impedance |Z| versus frequency f
measured with windings in parallel at +20 °C,
typical values
IND0624-K
10 6
B82791
| Z|
10 5
10 4
G/H2251N020
G/H2301N001
G/H2351N001
10 3
10 2 4
10
10 5
10 6
Hz 10 7
f
Current derating Iop/IR
versus temperature TA
Impedance |Z| versus frequency f
measured with windings in parallel at +20 °C,
typical values
Please read Cautions and warnings and
Important notes at the end of this document.
B82791G/H/K
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Power line chokes
Current-compensated ring core double chokes
B82791G/H/K
Cautions and warnings
Please note the recommendations in our Inductors data book (latest edition), online catalogs and
in the data sheets.
– Particular attention should be paid to the derating curves, if given. Derating applies in the case
the ambient temperature in application exceeds the rated temperature of the component.
– Ensure the operation temperature of the component in application not to exceed the maximum
specified value or the upper climatic category temperature.
– The soldering conditions should also be observed. Temperatures quoted in relation to wave
soldering refer to the pin, not the housing.
If the components are to be washed varnished it is necessary to check whether the washing varnish agent that is used has a negative effect on the wire insulation, any plastics that are used, or
on glued joints. It is possible for washing varnish agent residues to have a negative effect in the
long−term on wire insulation.
Washing processes may damage the product due to the possible static or cyclic mechanical
loads (e.g., ultrasonic cleaning). They may cause cracks to develop on the product and its parts,
which might lead to reduced reliability or lifetime.
The following points must be observed if the components are potted, sealed, or varnished in customer applications:
– Many potting, sealing, or varnishing materials shrink as they harden. They therefore exert a
pressure on the plastic housing or core. This pressure can have a deleterious effect on electrical properties, and in extreme cases can damage the core or plastic housing mechanically.
– It is necessary to check whether the potting, sealing or varnishing materials used attack or destroy the wire insulation, plastics, or glue.
– The effect of the potting, sealing, or varnishing materials may change the high−frequency behavior of the components.
Magnetic core materials such as ferrites are sensitive to direct impact. This can cause the core
material to flake or lead to breakage of the magnetic core material.
Any type of tension or pressure on the product may result in damage and affect its functionality
and reliability.
– The products are only to be attached to fixings or mounting holes provided for this purpose in
accordance with the data sheet.
– If additional mechanical forces are applied to the component, e.g., application of gap pads, it
is necessary to check whether they attack or destroy any part of the component.
– It is not permitted for the product specified in the data sheet to assume a mechanical function
in the final application.
Inductance value can drop if external metallic or magnetic parts will be put close to the coil or into
the air gap of the coil or core or magnetic material.
Even for customer-specific products, conclusive validation of the component in the circuit can
only be carried out by the customer.
Display of ordering codes for TDK Electronics products
The ordering code for one and the same product can be represented differently in data sheets, data
books, other publications, on the company website, or in order-related documents such as shipping
notes, order confirmations and product labels. The varying representations of the ordering
codes are due to different processes employed and do not affect the specifications of the
respective products. Detailed information can be found on the Internet under
www.tdk-electronics.tdk.com/orderingcodes.
Please read Cautions and warnings and
Important notes at the end of this document.
8
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Important notes
The following applies to all products named in this publication:
1. Some parts of this publication contain statements about the suitability of our products for
certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements
about the suitability of our products for a particular customer application. As a rule, we
are either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to
check and decide whether a product with the properties described in the product specification is
suitable for use in a particular customer application.
2. We also point out that in individual cases, a malfunction of electronic components or failure before the end of their usual service life cannot be completely ruled out in the current
state of the art, even if they are operated as specified. In customer applications requiring a
very high level of operational safety and especially in customer applications in which the malfunction or failure of an electronic component could endanger human life or health (e.g. in accident prevention or life-saving systems), it must therefore be ensured by means of suitable design of the customer application or other action taken by the customer (e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by third parties in the event
of malfunction or failure of an electronic component.
3. The warnings, cautions and product-specific notes must be observed.
4. In order to satisfy certain technical requirements, some of the products described in this publication may contain substances subject to restrictions in certain jurisdictions (e.g. because they are classed as hazardous). Useful information on this will be found in our Material
Data Sheets on the Internet (www.tdk-electronics.tdk.com/material). Should you have any more
detailed questions, please contact our sales offices.
5. We constantly strive to improve our products. Consequently, the products described in this
publication may change from time to time. The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order.
We also reserve the right to discontinue production and delivery of products. Consequently, we cannot guarantee that all products named in this publication will always be available. The
aforementioned does not apply in the case of individual agreements deviating from the foregoing
for customer-specific products.
6. Unless otherwise agreed in individual contracts, all orders are subject to our General Terms
and Conditions of Supply.
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Important notes
7. Our manufacturing sites serving the automotive business apply the IATF 16949 standard.
The IATF certifications confirm our compliance with requirements regarding the quality management system in the automotive industry. Referring to customer requirements and customer specific requirements (“CSR”) TDK always has and will continue to have the policy of respecting individual agreements. Even if IATF 16949 may appear to support the acceptance of unilateral requirements, we hereby like to emphasize that only requirements mutually agreed upon can
and will be implemented in our Quality Management System. For clarification purposes we
like to point out that obligations from IATF 16949 shall only become legally binding if individually
agreed upon.
8. The trade names EPCOS, CarXield, CeraCharge, CeraDiode, CeraLink, CeraPad, CeraPlas,
CSMP,
CTVS, DeltaCap, DigiSiMic, FilterCap, FormFit, InsuGate, LeaXield, MediPlas,
MiniBlue, MiniCell, MKD, MKK, ModCap, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod,
PhiCap, PiezoBrush, PlasmaBrush, PowerHap, PQSine, PQvar, SIFERRIT, SIFI, SIKOREL,
SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, ThermoFuse, WindCap, XieldCap are
trademarks registered or pending in Europe and in other countries. Further information will be
found on the Internet at www.tdk-electronics.tdk.com/trademarks.
Release 2023-08
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