---- May 27th 2024 ----

CAGE Code: 5DME2
ITAR Registration Code: M28889
Call: 1 (800) 377-3244
Monday to Friday 8 A.M. - 5 P.M. (Pacific Time)
E-mail questions and requirements to: sales@coilws.com

Pricing is subject to change depending on product availability and backorders.
*Please Note: Items without price are listed for CWS' capability purposes.

Very High Current Power

The CWS' HCS Series of Very High Current Choke / Very High Power Inductor handles up to 450 Amperes and are designed using multiple copper foils winding to achieve lower DC resistance (DCR), lower AC resistance (skin effect loss), and high inductance. The core materials used are stacked E-shaped Distributed Air Gaps Compacted E-Cores from Micrometal. Both Gapped and UnGapped cores are used to extend the DC bias capability.

The HCS Series of Very High Power Inductor / Very High Current Inductor are capable of handling high DC bias current up to 450 Amps, high energy storage and high voltage swing due to higher mass and higher saturation flux densities of the cores used.

The table below shows the types of cores used in each of the part number. The HCS Series are constructed using Iron Powder, Silicon Iron or Sendust cores and are suitable for swinging chokes, energy storage filter inductor in SMPS with high ripple current, in-line noise filters with large AC voltage swing, unidirectional drive application such as pulse transformer and flyback transformer.

The HCS Series stacked E-Cores are from Micrometals's #26 materials (Iron Powder), Micrometal's Super-MSS (Sendust) and Micrometal's FluxSan (Silicon Iron). The Silicon Iron version is suitable for those application requiring small inductance drop when a high DC current (DC bias) is flowing into the inductor. The Sendust version is suitable for energy storage inductors. The Iron Powder version is suitable for Output Ripple filtering, High Power Output Chokes and High Current Inductor where a good DC bias characteristics is desired. The core loss of the Sendust and Silicon Iron are very similar at frequency below 300 Khz. Silicon Iron version cost a little more than the others. The Silicon Iron cores are not suitable for application over 750 Khz, and has a much higher core loss than the Sendust cores.

The part PDF drawing has the DC Bias Current versus Inductance table. It is not necessary that inductor with higher Inductance versus DC Bias Current is better in all cases. This is because Energy Storage in a filter is defined as 1/2 x [L] x [Sq I], where [L] is the inductance and [Sq I] is the square of the current flowing into the inductor. For energy storage filtering application, having a good DC bias is not always a desired feature. When the current flow into the inductor increases, the amount of energy stored increased to the square of the current [Sq I], and if the inductance [L] does not drop when the current increase, the energy stored maybe too high and could potentially cause a circuit to blow up. For such energy storage filtering application such as Input Filter ( Phi or butterworth or chebyshev filters), or the Boost Inductor, the HCS Series using Sendust is usually the desired choice. However, every application is different and the design engineer must balance the trade offs. <./p>

These very high current inductors need appropriate air flow for cooling down at DC Bias and at full load conditions. There are several different methods for cooling down and here we recommend the most straightforward method by using a fan. The link below show a typical type of Server Rack cooling fan which has 550 CFM for these big inductors. There is a Performance graph for your reference together with many detailed information to look at this type of fan for your applications.

Link of the recommended fan

Industrial Very High Current Filter Inductor, Switching Regulator Inductor, In-Line Noise Filters, Differential Mode Choke, Boost Power Factor Correction Choke and Welding Machine Output Inductor.
Inductance range 800 uH and up to 450 Amps Current Rating

Custom design available. Please email or call us.

Part Number Inductance Current
Rating (Amps)
at 120 Amps
DC Bias
DCR Max (milli-Ohms) Dimension:
Length x Width x Height
Core Material Inductance
at 300 Amps
DC Bias
Thermal Model Quantity
on hand
HCS-801M-350A 800uH 350 268 uH 4.5 393.7x118.1x96.5 Powder Core 123 uH 3D STEP Thermal Model 0 $2,000.00
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HCS-631M-450A 630uH 450 423 uH 4.5 393.7x118.1x96.5 MegaFlux 249 uH 3D STEP Thermal Model 0 $1,750.00
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HCS-631M-450A-3KV 630uH 450 423 uH 4.5 393.7x118.1x96.5 MegaFlux 249 uH     0 $1,500.00
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HCS-601M-500AG RB1 600uH 500 400 uH 4.5 495.30 x 114.30 x 101.50 Powder Core 274uH     0 $1,750.00
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HCS-211M-300A 210uH 300 129 uH 1.2 393.7x118.1x96.5 Iron Powder 60 uH 3D STEP Thermal Model 1 $1,750.00
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HCS-201M-600A 190uH 600 162uH 2.5 457.2x114.3x101.60 Iron Powder 79uH 3D STEP Thermal Model 0 $1,750.00
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HCS-161M-450A 160uH 450 136 uH 1.2 393.7x118.1x96.5 MegaFlux 92 uH 3D STEP Thermal Model 0 $1,500.00
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HCS-121M-450A 120uH 450 102 uH 1.2 393.7x118.1x96.5 Powder Core 77 uH 3D STEP Thermal Model 0 $1,750.00
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HCS-121M-450A-CI 120uH 450 102 uH 1.35 420.0x118.1x96.5 Powder Core 77 uH 3D STEP Thermal Model -2 $1,300.00
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CWS-1EE-12720 104uH 300 101 uH 4.0 393.7x127.0x118.84 High Flux 90u uH 3D STEP Thermal Model 0 $1,500.00
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CWS-1EE-13097 100uH 1000 82 uH 3.5 609.6 x 304.8 x 254.0 Powder Core       0
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HCS-850M-280A 85uH 280 56 uH 1.0 292.1x119.38x96.52 Powder Core N/A 3D STEP Thermal Model 0 $1,750.00
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CWS-1EE-12721 71uH 300 69 uH 4.0 393.7x127.0x127.0 High Flux 61 uH 3D STEP Thermal Model 1 $1,550.00
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HCS-600M-320A 60uH 320 45 uH 0.8 11.50 x 4.70 x 3.80 Powder Core 32 uH     0 $1,750.00
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HCS-280M-180A 28uH 180 22 uH 0.65 393.7x118.1x96.5 Iron Powder N/A 3D STEP Thermal Model 1 $1,750.00
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HCS-143M-30A 14mH 30 N/A 225 117.0x115.0x95.0 Powder Core N/A 3D STEP Thermal Model 1 $1,500.00
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HCS-BRA-001 REV C 0N/A N/A BRACKET FOR MOUNTING 121.5 x 53.3 x 105.29 Aluminum N/A 3D STEP N/A 10 $35.00
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009CS-EN002 REV.B 0N/A N/A CASE FOR ENCAPSULATION 457.2 x 155.96 x 113.79 Aluminum N/A   N/A 0
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009CS-EN001 REV.B 0N/A N/A CASE FOR ENCAPSULATION 533.4 x 155.96x 113.79 Aluminum N/A   N/A 0
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HCS-601M-500AG REV A                 0 $1,750.00
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Min:  0 Units:  0

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 towww.P65Warnings.ca.gov.

Any Comments, Suggestions or Questions? Contact us!
Email: sales@coilws.com
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 www.ccr.gov)