Document 141-1

Common Mode Line Chokes – EE Styles• Low cost
• 3 mm creepage and clearance from all terminations to thecore• 3750 Vrms, one minute isolation between windings• UL1446 Class B (130°C) Insulation System (UL File E83628)• Industry-standard EE25 size
• Wide range of available inductances and current ratings

Coilcraft Designer’s Kit No. P402 contains samplesof eight standard EE and toroidal common mode line
chokes. To order, contact Coilcraft or purchase on-line atbuy.coilcraft.com.

Coilcraft common mode standard packages incorporateseveral features to help meet the requirements of major
safety agencies. These include 2 mm thick center flanges
and 3 mm creepage and clearance from all terminations
to the core.
Common mode chokes are used to reduce AC line conducted interference produced by switching power supplies.
This configuration produces opposing magnetic fluxes in
the core that serve to cancel in-phase noise signals appearing across the AC line.
This mode allows much more filtering capability in a given
core size than would be possible using differential filtering

alone. Use of common mode chokes therefore reducescomponent count as well as inductor size.
Combining both common and differential mode chokes
gives the power supply designer the added flexibility
required to adjust the filtering to meet FCC, VDE, andother requirements as well as optimize the circuit for theparticular noise levels and frequencies produced by eachpower supply design.
The Coilcraft packaging of common mode chokes allows
windings to be balanced within 1% and features the costeffectiveness of standard EE core styles.

Schematic2

Typical Application
2440.005 µF
AC
input

0.1 µF0.1 µF0.005 µF

97

9US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

7Document 141-1

Revised 04/20/12© Coilcraft Inc. 2013This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.

Document 141-2

Common Mode Line Chokes – EE StylesStandard EE Line Chokes
PartnumberCurrent
rating1

DCR max2(Ohms)

Inductance3min

E3490-AL
E3491-AL
E3492-AL
E3493-AL
E3494-AL
E3495-AL
E3496-AL
E3497-AL
E3498-AL

500 mA
750 mA
1A
1¼ A
1½ A
2A
2½ A
3A
4A

0.980
0.390
0.270
0.190
0.105
0.069
0.044
0.029
0.016

9.9 mH
3.9 mH
2.9 mH
2.1 mH
1.1 mH731 µH468 µH299 µH
168 µH

1. Based on 300 circular mils/Amp. Temperature rise is less than 10°C.
2. DCR is maximum per winding.
3. Per section. Typical values are approximately 30% higher than publishedminimums.
4. Ambient temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.
6. Parts in bold type are included in Coilcraft Designer’s Kit No. P402.

0.950
max
24,130.032
dia ref
0,813

0.15 ±0.030
3,81 ±0,762

0.40
10,160.155
ref
3,937

2

40.62 ±0.015
15,75 ±0,38

1.10
max
27,94
0.079
min
2,00

97

1.10 max
27,94

Weight:Terminations:

19 – 33.8 g
Tin-silver over tin over copperStandard EE Line Chokes – High InductancePartnumberCurrent
rating1

DCR max2(Ohms)

Inductance3min

E3499-AL
E3500-AL
E3501-AL
E3502-AL
E3503-AL
E3504-AL
E3505-AL
E3506-AL
E3507-AL

500 mA
750 mA
1A
1¼ A
1½ A
2A
2½ A
3A
4A

1.260
0.500
0.350
0.230
0.130
0.087
0.055
0.037
0.022

16.8 mH
6.6 mH
4.9 mH
3.6 mH
1.87 mH
1.24 mH
796 µH508 µH286 µH

1. Based on 300 circular mils/Amp. Temperature rise is less than 10°C.
2. DCR is maximum per winding.
3. Per section. Typical values are approximately 30% higher than publishedminimums.
4. Ambient temperature range –40°C to +85°C.
5. Electrical specifications at 25°C.

1.20max
30,480.032
dia ref
0,813

0.15 ±0.030
3,81 ±0,762

0.40
10,160.155
ref
3,937

2

4

0.62 ±0.015
15,75 ±0,381.10max
27,94
0.079
min
2,00

97

1.10 max
27,94

For custom values or information on toroidal common mode line chokes,
please contact Coilcraft.

Weight:Terminations:

19 – 33.8 g
Tin-silver over tin over copper

US +1-847-639-6400 sales@coilcraft.comUK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 141-2

Revised 04/20/12© Coilcraft Inc. 2013This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.