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EPCOS AG 2012. Reproduction, publication and dissemination of this publication, enclosures
hereto and the information contained therein without EPCOS’ prior express consent is prohibited.
Power line chokes
Current-compensated E core double chokes
250 V AC, 0.3 … 1.8 A, 3.3 … 100 mH, +40 °C
Series/Type: B82731T
Date: July 2012
207/12
Please read Cautions and warnings and
Important notes at the end of this document.
Rated voltage 250 V AC
Rated current 0.3 ... 1.8 A
Rated inductance 3.3 ... 100 mH
Construction
■Current-compensated double choke
■Closed E ferrite core
■Closed PET coil former with 4 sections (UL 94 V-0)
■Without encapsulation
■4-section winding
■Clearances 2.5 mm, creepage distances 3 mm
Features
■High resonance frequency due to 2-section winding
■High pulse strength
■Low whirring noise
■Approx. 2% stray inductance for symmetrical
interference suppression
■Suitable for wave soldering
■Design complies with EN 60938-2 (VDE 0565-2) and UL 1283
■UL and ENEC (VDE) approvals
■RoHS-compatible
Applications
■Suppression of common-mode interferences
■Electronic ballasts for lamps
■Switch-mode power supplies for consumer electronics
Terminals
■Pins 0.64 0.64 (mm)
■Lead spacing 10 10 (mm)
Marking
Manufacturer, rated current, rated inductance,
approvals, pin 1 marking, ordering code,
date of manufacture (YYWW), production place
Delivery mode
Blister tray in cardboard box
B82731TPower line chokes
Current-compensated E core double chokes
307/12
Please read Cautions and warnings and
Important notes at the end of this document.
Dimensional drawing and pin configuration
Tolerances to ISO 2768-C unless otherwise noted.
Dimensions in mm
IND0359-Z-E
21.5 max.
0.64
0.7
+0.0
3.5
_
21.1 max.
13.5 max.
Marking of pin 1
10±0.2
10±0.2
64
31
IND0360-U
31
46
IND0361-L-E
(view in mounting direction)
ø1.45±0.05
10
10
13
46
Recommended hole arrangement
B82731TPower line chokes
Current-compensated E core double chokes
407/12
Please read Cautions and warnings and
Important notes at the end of this document.
Technical data and measuring conditions
Rated voltage VR250 V AC (50/60 Hz)
Test voltage Vtest 1500 V AC, 2 s (line/line)
Rated temperature TR+40 C
Rated current IRReferred to 50 Hz and rated temperature
Rated inductance LRMeasured 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, typical values, specified per win-
ding
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. 15 g
Approvals EN 60938-2, UL 1283
B82731TPower line chokes
Current-compensated E core double chokes
507/12
Please read Cautions and warnings and
Important notes at the end of this document.
Characteristics and ordering codes
= approval granted
Sample kit available. Ordering code: B82731X002
For more information refer to chapter “Sample kits”.
IR
A
LR
mH
Lstray,typ
H
Rtyp
m
Ordering code Approvals
0.30 100 2000 6600 B82731T2301A020
0.35 68 1300 4400 B82731T2351A020
0.45 47 950 2800 B82731T2451A020
0.55 39 800 2200 B82731T2551A020
0.65 27 550 1600 B82731T2651A020
0.8 15 300 950 B82731T2801A020
1.0 10 200 630 B82731T2102A020
1.3 6.8 140 370 B82731T2132A020
1.8 3.3 65 200 B82731T2182A020
Impedance |Z| versus frequency f
measured with windings in parallel at +20 °C
typical values
Current derating Iop/IR
versus ambient temperature TA
|
Z
|
f
IND0363-B
2
10
3
10
104
105
106
107
4
10 105106107
Hz
Ω
T2182A020
T2132A020
T2102A020
T2801A020
T2651A020
T2551A020
T2451A020
T2351A020
T2301A020
B82731
B82731TPower line chokes
Current-compensated E core double chokes
607/12
Cautions and warnings
Current-compensated ring core double chokes
■Please note the recommendations in our Inductors data book (latest edition) and in the data
sheets.
– Particular attention should be paid to the derating curves given there. Derating must be applied
in case the ambient temperature in the application exceeds the rated temperature of the
component.
– Ensure the operation temperature (which is the sum of the ambient temperature and the
temperature rise caused by losses / self-heating) of the component in the application does not
exceed the maximum value specified in the climatic category.
– 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. In particular, 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 in customer applications:
– Many potting 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 material used attacks or destroys the wire
insulation, plastics or glue.
– The effect of the potting material can change the high-frequency behaviour of the components.
■Ferrites are sensitive to direct impact. This can cause the core material to flake, or lead to
breakage of the core.
■Even for customer-specific products, conclusive validation of the component in the circuit can
only be carried out by the customer.
Please read Cautions and warnings and
Important notes at the end of this document.
707/12
Important notes
Current-compensated ring core double chokes
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, EPCOS is 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 an EPCOS 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.epcos.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 the current version
of the “General Terms of Delivery for Products and Services in the Electrical Industry”
published by the German Electrical and Electronics Industry Association (ZVEI).
7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CeraLink, CSMP, CSSP, CTVS,
DeltaCap, DigiSiMic, DSSP, FilterCap, FormFit, MiniBlue, MiniCell, MKD, MKK, MLSC,
MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL,
SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, SIP5D, SIP5K, ThermoFuse, WindCap
are trademarks registered or pending in Europe and in other countries. Further information will
be found on the Internet at www.epcos.com/trademarks.
