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CAGE Code: 5DME2
ITAR Registration Code: M28889

- July 1st 2020 -
Call: 1 (800) 377-3244
We Are Open Monday to Friday 8 A.M. - 5 P.M. (Pacific Time)
E-mail your questions and requirements at:

*Please contact us for available stock.
Stock quantity of zero may be reflected as it is not implemented yet.

KN Series

KN Series: Vertical and Horizontal Mount Nanocrystalline Common Mode Choke and Amorphous Common Mode Choke
- Current Rating of 13 Amps to 40 Amps, Inductance from 4.6mH to 48 mH and DCR from 1.3 milli-ohms to 17 milli-ohms.
- Suitable for high and low ambient temperatures. Operating Temperature of 200 deg C.
- UL 94VO compliant and meets 3mm creepage spacing for UL, CSA, TUV and IEC specifications
- Exhibit excellent frequency response from 50 Hz to 10 Mhz

APPLICATION: Switch Mode Power Supplies, Power Line Filtering, Filters contact noise, Solar Inverters, Frequency Converters, EMC filters, Welding equipments, Wind generators, Automotive applications, Uninterruptible Power Supplies, Inductive heating, etc.

USEFUL TIPS: The SRF is where the peak impedance or the peak insertion loss occurs. Engineer should select the parts where the SRF coincides with the frequencies that have the highest noise amplitudes.

The prices shown below are for sample or small quantities. Please call or email us at for production quotes. Parts are usually in stock. Delivery is 4 to 6 weeks for out of stock parts. Data shown below can be sorted by header i.e. Part Number, Inductance, etc. Click to sort.

  Part Number Inductance Impedance (min)
@ 1 Mhz
Current Rating Leakage Inductance (typ)
@ 10 Khz
SRF (typical) Interwinding Capacitance (typ)
@ 100 Khz
DCR on Each Winding (max) OD x Width
Lead Diameter Nom.
Inch [mm]
Weight (grams) Quantity
on hand
  KN-H-483U-13A 48.00 mH 19.8 kOhm 13 Amp 37.8 uH 645 KHz 8.0 pF 17.3 mOhm 46.8 x 31.3 0.06 [1.45] 120 0 $10.00
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KN-H-203U-21A 20.00 mH 10.0 kOhm 21 Amp 15.0 uH 845 KHz 10.3 pF 5.7 mOhm 46.6 x 31.3 0.08 [2.1] 138 206 $12.50
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KN-H-203U-24A 20.00 mH 9.4 kOhm 24 Amp 14.7 uH 703 KHz 14.9 pF 5.6 mOhm 46.6 x 31.3 0.06 x 0.12 [1.45 x 2.90] 135 1 $10.93
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  CWS-CMN-12730 10.00 mH 2.75 kΩ 40 Amp 5.7 uH 2.40 MHz 6.00 pF 1.6 mΩ 50.00x32.00 1.450 x 2.900 135 0 $15.00
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... more info
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  KN-H-632U-26A 6.30 mH 2.2 kOhm 26 Amp 19.2 uH 2000 KHz 7.1 pF 2.0 mOhm 51.5 x 32.5 0.10 [2.59] 128 0 $11.50
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KN-H-562U-12A 5.60 mH 6.0 kOhm 12 Amp 63.0 uH 620 KHz 40.0 pF 25.0 mOhm 48.0 x 1.1 0.06 [1.45] 155 22
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KN-H-462U-40A 4.60 mH 1.7 kOhm 40 Amp 2.9 uH 2000 KHz 9.7 pF 1.7 mOhm 49.0 x 33.0 0.08 x 0.16 [2.05 x 4.10] 135 86 $10.00
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Disclaimer: Coil Winding Specialist, Inc., its affiliates, agents, and employees acting on behalf of Coil Winding Specialist, Inc. (collectively, CWS) disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. CWS reserves the right at any time and from time to time to make changes to design, technical specification, or construction of any product listed on this website without notice. CWS also reserves the right to discontinue or limit sale of any product or service available throughout this website on temporary or permanently basis without notice. CWS highly recommends customers not to use its products offered on this website for inappropriate use and applications. Products should be tested for its suitability by prospective customers in all possible applications and conditions. Customers using or selling CWS products for use in other than recommended applications do so entirely at their own risk and agree to fully indemnify CWS from any damages arising or resulting from such use or sale.

WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go

Any Comments, Suggestions or Questions? Contact us! Email:
CWS 353 West Grove Ave. Orange, California 92865
Call us Toll Free: 1-800-679-3184 or 1 (800) 377-3244

Tel: (714) 279-9010, Fax: (714) 279-9482

Copyright 2008, Coil Winding Specialist, Inc
Updated July, 2013

CAGE Code: 5DME2(Registered with