Power line chokes
Current-compensated ring core double chokes
250 V AC, 0.4 … 47 mH, 0.4 … 2.8 A, +70 °C
Series/Type:
Date:
B82721K2*U*
August 2017
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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.
Power line chokes
Current-compensated ring core double chokes
Rated voltage 250 V AC
Rated inductance 0.4 ... 47 mH
Rated current 0.4 ... 2.8 A / +70 °C
Construction
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B82721K2*U*
Current-compensated ring core double choke
Ferrite core wih epoxy coating (UL 94 V-0)
Plastic case (UL 94 V-0)
Potting (UL 94 V-0)
Sector winding
High resonance frequency due to special winding technique
Approx. 1% stray inductance for symmetrical interference suppression
Completely potted for local reduction of pollution degree (micro-environment)
Suitable for wave soldering
Plastic material approved to EN 60335-1 (VDE 0700-1) clause 30
1)
Design complies with EN 60938-2 (VDE 0565-2)
UL
2)
and ENEC (VDE) approvals
RoHS-compatible
Suppression of common-mode interferences
Switch-mode power applications
Household appliances ("white goods")
Heating control systems
Base material CuNi18Zn20
Layer composition Ni, Sn
Hot-dipped
Pins 0.7 0.7 (mm)
Lead spacing 10 15 (mm)
Features
Applications
Terminals
Marking
■
Product brand, approval signs and VDE standard number, ordering code, graphic symbol,
rated current, rated inductance, date of manufacture (YYWWD.internal ID code)
Delivery mode
■
Blister tray in cardboard box
1) Certified values:
Glow wire flammability index (GWFI to IEC 60695-2-12):
Glow wire ignition temperature (GWIT to IEC 60695-2-13):
Comparative tracking index (CTI to IEC 60112):
Ball pressure test (BP to IEC 60695-10-2):
2) UL approval with 300 V AC
+850 °C
+775 °C
600 V
+190 °C
Please read
Cautions and warnings
and
Important notes
at the end of this document.
2
08/17
Power line chokes
Current-compensated ring core double chokes
Dimensional drawings and pin configurations
B82721K2*U*
Please read
Cautions and warnings
and
Important notes
at the end of this document.
3
08/17
Power line chokes
Current-compensated ring core double chokes
Technical data and measuring conditions
Rated voltage V
R
Test voltage V
test
Rated temperature T
R
Rated current I
R
Rated inductance L
R
250 V AC (50/60 Hz)
2000 V AC, 2 s (line/line)
+70 °C
Referred to 50 Hz and rated temperature
B82721K2*U*
Measured with Agilent 4284A at 0.1 mA, +20 °C
Measuring frequency: L
R
1 mH: f=100 kHz
L
R
> 1 mH: f= 10 kHz
Inductance is specified per winding.
30% at +20 °C
< 10% at DC magnetic bias with I
R
, +20 °C
Measured with Agilent 4284A at 5 mA, +20 °C, typical
values
Measuring frequency: L
R
1 mH: f= 100 kHz
L
R
> 1 mH: f= 10 kHz
Measured at +20 °C, typical values, specified per winding
Sn96.5Ag3.0Cu0.5: +(245 3) °C, (3 0.3) s
Wetting of soldering area 95%
(to IEC 60068-2-20, test Ta)
+(260 5) °C, (10 1) s
(to IEC 60068-2-20, test Tb)
40/125/56 (to IEC 60068-1)
–25 °C … +40 °C,
Approx. 6.5 g
IEC / EN 60938-2, UL 1283 (E70122)
75% RH
Inductance tolerance
Inductance decrease L/L
0
Stray inductance L
stray,typ
DC resistance R
typ
Solderability (lead-free)
Resistance to soldering heat
(wave soldering)
Climatic category
Storage conditions (packaged)
Weight
Approvals
Please read
Cautions and warnings
and
Important notes
at the end of this document.
4
08/17
Power line chokes
Current-compensated ring core double chokes
Characteristics and ordering codes
I
R
A
0.4
0.5
0.5
0.8
1.0
1.3
1.6
2.2
2.8
L
R
mH
47
39
27
15
10
6.8
3.3
1.0
0.4
L
stray,typ
H
460
370
280
150
100
65
30
10
4
R
typ
m
1560
1380
1140
470
330
200
130
70
45
B82721K2401U030
B82721K2501U030
B82721K2501U031
B82721K2801U030
B82721K2102U030
B82721K2132U030
B82721K2162U030
B82721K2222U030
B82721K2282U030
Ordering code
B82721K2*U*
Approvals
Impedance |Z| versus frequency f
measured with windings in parallel at +20 °C,
typical values
Current derating I
op
/I
R
versus temperature T
A
Please read
Cautions and warnings
and
Important notes
at the end of this document.
5
08/17
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