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CAGE Code: 5DME2
ITAR Registration Code: M28889

- July 10th 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.

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
SolidWorks File Quantity
on hand
CWS-4200A 0.65 uH 25 Amps 3.50 milli ohms MPP 0.31 x 0.31 0.24 0.05 x 0.05   23 $7.00
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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   57 $7.00
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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 SolidWorks File 285 $7.00
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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 SolidWorks File 28 $7.00
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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 SolidWorks File 294 $7.00
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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 SolidWorks File 203 $7.00
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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   23 $7.00
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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 SolidWorks File 243 $7.00
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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 SolidWorks File 23 $7.00
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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   50 $7.00
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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