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¤EPCOS AG 2017. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS’ prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
SMT current sense transformers
EE 12.6
Series/Type: B82801C
Date: March 2017
203/17
Please read Cautions and warnings and
Important notes at the end of this document.
Application
■Switching power supplies
■Feedback control
■Overload sensing
■Load drop/shut down detection
Features
■Very low DC resistance
■Different turns ratios
■Small package
■Other pinning on request
■RoHS compatible
Marking
Middle block of ordering code
Delivery mode and packing units
■32 mm blister tape, 330 mm reel
■Carton packaging
■Packing units: 200 pcs./reel;
800 pcs./carton
B82801CSMT current sense transformers
EE12.6
303/17
Please read Cautions and warnings and
Important notes at the end of this document.
Dimensional drawing
Dimensions in mm
B82801CSMT current sense transformers
EE12.6
403/17
Please read Cautions and warnings and
Important notes at the end of this document.
Application circuit and pinning
Technical data and measuring conditions
Frequency range 50 ... 500 kHz
Hi-pot 1500 V AC, 50 Hz, 2 s (winding to winding)
Inductance L (2-4) 100 kHz, 100 mV, @ +25 °C
DC resistance Rmax Measured at +25 °C (specified per winding)
Sensed current The max. primary current of 40 A causes approx. +40 °C
temperature rise
Solderability t99.9 Sn, lead-free. Or
Sn96.5Ag3.0Cu0.5: +(245 r5°C, (3 r03) s
Wetting of soldering area t 95%
(to IEC 60068-2-58)
Resistance to soldering heat +(260 r 5) °C, (10 r1 s) to IEC 60068-2-58
Storage conditions –20 °C … +40 °C, d75% RH
Operating temperature range 40 °C … +125 °C
Weight Approx. 4.8 g
B82801CSMT current sense transformers
EE12.6
503/17
Please read Cautions and warnings and
Important notes at the end of this document.
With:
Bmax Maximum magnetic flux density in the ferrite core of the current sense transformer
Vsense,max Maximum output voltage of the measurement signal
Gmax Maximum duty cycle
nsNumber of turns of the secondary winding of the current sense transformer
AeEffective magnetic area of the ferrite core
fosc Operating frequency of the switching operator IC
Typical value for Ae: 12.4 x 10-6 m2
Typical Bmax: 200 mT
With:
RTResistance of burden resistor
Vsense,max Maximum output voltage of the measurement signal
nsNumber of turns on the secondary side of the CT
Iprim,max Maximum primary current (peak current)
Characteristics and ordering codes
Lmin
mH
Turns ratio
Np : Ns
DC resistance
Rmax (m:)
Voltage-
time product
V µs
Recomm.
RT
:
Ordering code
primary secondary
1.4 1 : 50 0.28 400 124 50 B82801C0145A050
5.6 1 : 100 0.28 1000 248 100 B82801C0565A100
12.6 1 : 150 0.28 2200 372 150 B82801C1265A150
22.4 1 : 200 0.28 2900 496 200 B82801C2245A200
Bmax
Vsense maxGmax
nsAefosc
-----------------------------------------
=
RT
Vsense maxns
Iprim max
-----------------------------------
=
B82801CSMT current sense transformers
EE12.6
603/17
Please read Cautions and warnings and
Important notes at the end of this document.
Taping and packing
Blister tape
Reel
Dimensions in mm
Dimensions in mm
Dimensions in mm
B82801CSMT current sense transformers
EE12.6
703/17
Please read Cautions and warnings and
Important notes at the end of this document.
Recommended reflow soldering curve
Pb-free solder material (based on JEDEC J-STD 020D)
Max. time from +25 °C to T: 300 seconds
Max. 3 reflow cycles
T1
°C
T2
°C
T3T4T1T2
sec
T3
sec°C °C sec
150 200 217 245 <110 <90 20 ... 40
SMT current sense transformers
EE12.6
B82801C
803/17
Cautions and warnings
■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.
– 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.
Display of ordering codes for EPCOS products
The ordering code for one and the same product can be represented differently in data sheets,
data books, other publications and the website of EPCOS, 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.epcos.com/orderingcodes.
Please read Cautions and warnings and
Important notes at the end of this document.
903/17
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.
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, CeraCharge, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP, CTVS,
DeltaCap, DigiSiMic, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue, MiniCell, MKD, MKK, MotorCap,
PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PowerHap, PQSine, PQvar, SIFERRIT, SIFI, SIKOREL,
SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, ThermoFuse, WindCap 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 2018-10
