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CAGE Code: 5DME2
ITAR Registration Code: M28889

- November 22nd 2017 -
Call: 1 (800) 377-3244
We Are Open Monday-Friday 8 am - 5 pm PT

  • Careers
  • CWS-5XXX Series

    Planar Output Inductor using High Flux and MPP powder material "distributed air gap" cores
    Capable of handling very high DC bias current with lowest inductance roll off.
    Helical Wound Bobbinless Surface Mount.
    Co-planared SMT pre-tinned leads for directly soldered to PCB
    Available as bulk packaged or in tape and reel packaging
    Inductance ranges: 0.3 uH, 0.7uH and 2.0uH
    DC Current Rating: 60 Amps, 50 Amps, 40 Amps
    Custom designs for other inductances and current rating available. Please contact us.

    CWS 5 Series : 80 Amps to 30 Amps Planar Output Inductor
    Surface Mount Power Inductors.

    Helical Winding on High Flux and MPP Powder Core
    CWS Flagship products !!

    • Super high current in industry's smallest package
    • Exceptional DC bias stability at high flux densities
    • Saturation Flux densities at 8,000 to 12,000 gausses
    • High Flux and MPP powder cores with distributed air gaps and very high temperature stability
    • Less than 1% inductance change from -60 deg C to + 140 deg C
    • Designed for commercial, industrial and military application
    • Operating temperature range: -55 deg C to +125 deg C
    • Inductance values : 0.3 uH to 2.0 uH +
    • Current rating : 80 Amps, 60 Amps, 50 Amp, 40 Amp
    • DC Resistance: 0.55 mili-ohm, 1.0 milli-ohm, 2.1 milli-ohm
    • Hi-Pot: 300 Vrms, winding to core
    • Dimension: Please see individual engineering drawings.


    Click the button to see examples of our custom wound products. We wind anything to meet your needs.

    Download DC Bias Graphs in .PDF
    CWS-4000A : DC Bias Graph
    CWS-4001A : DC Bias Graph
    CWS-5291B : DC Bias Graph
    CWS-5292A : DC Bias Graph
    CWS-5292B : DC Bias Graph

    CWS-5293A : DC Bias Graph
    CWS-5321B : DC Bias Graph
    CWS-5322B : DC Bias Graph

    Please see table below and Engineering Drawings (.PDF) for dimensions
    Packaging: Bulk or tape and reel


    Sample PDFs for Outline Drawing and Schematic

    Part Numbering

    CWS - 5291B

    CWS: CWS Standard Part
    5291: Drawing No
    B : version


    1) No tooling or set up fees required for standard parts
    2) Samples available for large volume OEMs. Pricing for large quantities may be significantly lower. Please call? or e-mail us to inquire further information.
    3) Availability: Stock to 4-6 weeks
    4) Custom designs are available to meer any of your requirements.
    5) Rated Current is based on a 40 deg C temperature rise at an ambient temperature of 125 deg C.
    The High Flux and MPP cores are rated over 200 ged C. The helical frat wire's insulation is rated at 200 deg C.

    You can sort the data shown below by clicking preferred header.

      Part Number Inductance Current
    Core Type Dimension
    Length x Width
    Width x Thickness
      CWS-5327A 7.60 uH 12 Amps 14.00 milli ohms High Flux 0.54 x 0.47 0.22 0.11 x 0.01 $5.75
    Buy Now
      CWS-5326A 4.70 uH 17 Amps 7.00 milli ohms High Flux 0.54 x 0.42 0.22 0.10 x 0.01 $5.75
    Buy Now
      CWS-5325A 3.90 uH 21 Amps 4.90 milli ohms High Flux 0.54 x 0.42 0.22 0.10 x 0.02 $5.75
    Buy Now
      CWS-5324A 2.70 uH 21 Amps 4.20 milli ohms High Flux 0.54 x 0.42 0.22 0.10 x 0.02 $5.75
    Buy Now
      CWS-5321B 2.00 uH 40 Amps 2.10 milli ohms High Flux 0.52 x 0.54 0.21 0.10 x 0.02 $5.75
    Buy Now
      CWS-4001A 2.00 uH 12 Amps 4.00 milli ohms MPP 0.26 x 0.35 0.21 0.06 x 0.03 $5.75
    Buy Now
      CWS-5323A 1.30 uH 40 Amps 1.80 milli ohms High Flux 0.54 x 0.42 0.22 0.10 x 0.02 $5.75
    Buy Now
      CWS-5294A 1.20 uH 50 Amps 1.10 milli ohms High Flux 0.55 x 0.68 0.23 0.16 x 0.03 $5.75
    Buy Now
      CWS-5322B 0.70 uH 50 Amps 0.90 milli ohms High Flux 0.52 x 0.55 0.21 0.10 x 0.03 $5.75
    Buy Now
      CWS-4200A 0.65 uH 25 Amps 3.50 milli ohms MPP 0.31 x 0.31 0.24 0.05 x 0.05 $5.75
    Buy Now
      CWS-5291B 0.30 uH 60 Amps 0.55 milli ohms High Flux 0.52 x 0.56 0.21 0.10 x 0.05 $5.75
    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