1
09/04
Chokes for power lines
E core chokes
B82731T
Rated voltage 250 VAC
Rated current 0.3 to 1.8 A
Rated inductance 3.3 to 100 mH
Construction
Current-compensated double choke
with closed E ferrite core
Closed PETP coil former with 4 sections
Without encapsulation
2-section winding
Clearances
>2.5 mm, creepage distances >3 mm
Features
Coil former flame-retardant as per UL 94 V-0
High resonance frequency due to 2-section winding
High pulse strength
Low whirring noise
Approx. 2% stray inductance for symmetrical
interference suppression
Applications
Electronic ballasts for lamps
Switch-mode power supplies for consumer electronics
Terminals
Pins lead-free tinned
Lead spacing 10 x 10 mm
Marking
Manufacturer, rated current, rated inductance,
ordering code, date of manufacture
Approvals
Approval marks
Standards
EN 60938-2
UL 1283
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09/04
Chokes for power lines
E core chokes
B82731T
Dimensional drawing and pin configuration
General technical data
Rated voltage V
R
250 VAC
Test voltage V
test
1500 VAC, 2 s (line/line)
Rated current I
R
Referred to 50 Hz and 40
C ambient temperature
Rated inductance L
R
Measured at 20 C, measuring current 0.1mA,
measuring frequency 10 kHz
(specified per winding)
Inductance tolerance
-30/+50%
Inductance decrease
L/L
0
<10% at DC magnetic bias with I
R
Climatic category
40/125/56 (
-40/+125/56 days damp heat test)
to EN 60068-1
Weight
Approx. 15 g
IND0359-Z-E
21.5 max.
0.64
0.7
+0.0
3.5
_
21.1 max.
13.5 max.
Marking of pin 1
100.2
100.2
6
4
3
1
IND0360-U
3
1
4
6
IND0361-L-E
(view in mounting direction)
1.450.05
10
10
1
3
4
6
Recommended hole arrangement
3
09/04
Chokes for power lines
E core chokes
B82731T
Characteristics and ordering codes
I
R
A
L
R
mH
L
stray, typ
H
R
typ
m
Ordering code
0.3
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)
Current derating I/I
R
versus ambient temperature T
A
|Z|
f
IND0363-B
2
10
3
10
10
4
10
5
10
6
10
7
4
10
10
5
10
6
10
7
Hz
3.3 mH
6.8 mH
10 mH
15 mH
27 mH
39 mH
47 mH
68 mH
100 mH
B82731T
I
R
I
A
T
IND0362-N
0.2
0.4
0.6
0.8
1.0
1.2
1.4
20
0
40
60
80
100
140
C
B82731T
4
09/04
Chokes for power lines
E core chokes
B82731T
Published by EPCOS AG
Corporate Communications, P.O. Box 80 17 09, 81617 Munich, GERMANY
++49 89 636 09, FAX (0 89) 636-2 26 89
EPCOS AG 2004. Reproduction, publication and dissemination of this brochure and the informa-
tion contained therein without EPCOS' prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of
the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic
Manufacturers' Association), unless otherwise agreed.
This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
the international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
the type in question please also contact one of our Sales Offices.
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