Please use side menu if you cannot use dropdown boxes, or the header boxes
CAGE Code: 5DME2
ITAR Registration Code: M28889

- April 5th 2020 -
Call: 1 (800) 377-3244
We Are Open Monday-Friday 8 am - 5 pm PT

CM Series : 1 to 60 Amps Small Size Toroidal Common Mode Inductors

- Available as through hole vertical or horizontal mounting
- Single layer wound on high permeability ferrite for widest frequency range
- Spacer provides 3mm creepage spacing to meet UL, CSA and IEC safety specifications
- All materials used are UL 94VO recognized.
- Dimension : Outside Diameter: 25mm. Width or Height: 11mm
- Inductance range from: 70 uH to 17 mH
- DCR : 9 milli ohms to 440 milli ohms
- Suitable for power line filtering and EMI/RFI suppression in SMPS
CM Series: 1 Amps to 60 Amps Common Mode Choke

  • Separated windings for minimum interwinding capacitance
  • Single layer windings for highest common mode impedance over the widest frequency range
  • Spacer provides 3 mm creepage distance for UL, CSA, IEC compliance
  • All materials used are UL94-VO recognized
  • 200 C insulated solid wires used for high temperature operation
  • Operating temperature: - 40 C to + 105 C. Please call factory for 125 C types
  • Suitable for 100 Khz to 500 Khz
  • Available in both vertical or horizontal mount
  • Application includes power line filtering, EMI/RFI for switch mode power supplies

  • Custom inductance values or current ratings are available.
  • For custom or special orders, the sizes may be different from those shown here
  • The prices shown below are for low volume quantity.
    Please call 800-377-3244 or email for larger volume OEM pricing.
  • Not all parts are in stock. If parts are out of stock, delivery can take up to 6 weeks.

  Part Number Inductance Tolerance Max DC
DC Current
Rating (Amp)
  CWS-CM-12354 200.00 uH + -30% 5.00 milli Ohms       Ht = 12, OD=24.00mm
Call for Price
... more info
Call for price
  CM-161U-60A 160.00 uH 30% 0.5 60.0 2.0 uH 145.00 pF Ht=21.5, OD=43.5mm $18.00
Buy Now
  CWS-CMN-12734 22.00 uH 10% 3.0 mΩ 30 1.92 uH 18.0pF Ht=9.00, OD=25.00mm $9.00
Call for Price
... more info
Call for price
  CM-173U-1A 17.00 mH 30% 440.0 1.0 75.0 uH 32.10 pF Ht=9.4, OD=24.0mm $4.00
Buy Now
  CM-492U-2.3A 4.90 mH 30% 75.0 2.3 27.3 uH 20.20 pF Ht=9.4, OD=24.0mm $4.00
Buy Now
  CM-332U-9A 3.30 mH 30% 16.0 9.0 30.0 uH 55.00 pF Ht=12.0, OD=29.2mm $4.00
Buy Now
  CM-322U-3A 3.20 mH 30% 60.0 3.0 20.0 uH 16.80 pF Ht=9.4, OD=24.0mm $4.00
Buy Now
  CM-182U-4.5A 1.80 mH 30% 20.0 4.5 10.5 uH 15.30 pF Ht=10.0, OD=25.0mm $4.00
Buy Now
  CM-142U-7.5AV 1.20 mH Min. 15.0 7.5 9.0 uH 10.30 pF Ht=13.0, OD=26.0mm $4.00
Buy Now
0.88 mH Min. 6.5 9.0 5.5 uH 12.80 pF Ht=11.0, OD=26.0mm $6.25
Buy Now
  CM-471U-15A 0.47 mH 30% 4.0 12.0 3.3 uH 9.11 pF Ht=12.7, OD=28.0mm $4.00
Buy Now
  CM-181U-15A 0.18 mH 30% 2.5 15.0 1.2 uH 6.50 pF Ht=11.0, OD=26.0mm $4.00
Buy Now
  CM-101U-19A 0.10 mH 30% 1.3 19.0 0.8 uH 4.70 pF Ht=12.0, OD=27.5mm $4.00
Buy Now
  CM-650U-23A 0.07 mH Min. 2.0 23.0 62.0 uH 16.80 pF Ht=14.0, OD=28.7mm $4.00
Buy Now

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