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High current inductors are essential components designed to handle high DC bias current and high energy storage (up to 450A) in power supplies and energy systems, often using flat-wire or foil construction for low DC resistance (DCR). These inductors prevent rapid current changes and are used in DC-DC converters, EV systems, and 5G base stations. 
Key design elements of high-current inductor bases and assemblies include: 
  • Core Materials: High-frequency, high-current applications often utilize ferrite cores for low losses, or iron powder, silicon iron, and Sendust for high saturation resistance.
  • Winding Technology: Flat wire (or helical windings) is widely used to maximize surface area, reduce DC resistance (DCR), and reduce power loss, as seen in TDK’s ERU inductors.
  • Magnetically Shielded: Many high-current inductors use shielding to minimize Electromagnetic Interference (EMI), crucial for compact electronics.
  • Temperature Stability: Components are designed to operate efficiently within high temperature ranges, commonly from -40°C to +155°C. 
Core Types for High Current: 
  • Ferrite Cores: Suitable for high frequency due to low core loss, ideal for compact, high-efficiency power supplies.
  • Powder Cores: Offer excellent saturation characteristics and high temperature stability.
  • Air Core/Shaped Foil: Used when extremely high current and high temperature resistance (up to 200°C) are required. 
Applications: 
  • Automotive & EV: DC-DC converters, battery management systems.
  • Industrial & Data: High-current, high-frequency switching power supplies, POL modules, VRMs for servers, and 5G network equipment.
  • Energy Storage: Boost power factor correction (PFC) chokes. 
Major manufacturers include Coilcraft (SER80xx Series), TDK, Eaton, and West Coast Magnetics. 
  • Coilcraft
    SER80xx Series High Current Shielded Power Inductors
    SER80xx Series high-current, high-inductance power inductors feature a flat-wire construction, resulting in exceptionally low DC r...
  • www.wcmagnetics.com
    WCM323 Series High Current Power Inductor
    WCM323 series toroidal inductors are designed for switching power applications at frequencies up to 500 kHz This inductor has an o...
  • www.wcmagnetics.com
    Power Chokes | Custom Power Inductors - West Coast Magnetics
    WCM307 Series Shaped Foil Chassis Power Inductor * Compact Size. * High Current Rating. * Shaped Foil TechnologyTM. * 200C Tempera...
  • Eaton
    HCP Inductor - Eaton
    Eaton's HCP family high current power inductors offer three footprints with an inductance range from 0.095 uH to 4.7 uH, current r...
  • TDK Product Center
    High Current Flat Wire Inductors - TDK Product Center
    Apr 7, 2026 — TDK offers a wide range of high-current flat wire inductors. ERU inductors have compact dimensions due to flat helical winding wit...
  • Coil Winding Specialist
    Very High Current Power : Coil Winding Specialist, Inc.
    High current inductors are designed to handle high DC bias current, high energy storage, and high voltage swing. They are suitable...
  • Eaton
    Eaton high current inductors offer performance stability in industrial ...
    This product offers better performance at higher frequencies. Their preformed flat wire design offers very low DCR and are availab...
  • TTI, Inc.
    EATON High Current Power Inductors - TTI, Inc.
    EATON High Current Power Inductors are designed to support high-current, high-frequency power applications with low inductance req...
  • Coilcraft
    SER80xx Series High Current Shielded Power Inductors
    SER80xx Series high-current, high-inductance power inductors feature a flat-wire construction, resulting in exceptionally low DC r...
  • www.wcmagnetics.com
    WCM323 Series High Current Power Inductor
    WCM323 series toroidal inductors are designed for switching power applications at frequencies up to 500 kHz This inductor has an o...
  • www.wcmagnetics.com
    Power Chokes | Custom Power Inductors - West Coast Magnetics
    WCM307 Series Shaped Foil Chassis Power Inductor * Compact Size. * High Current Rating. * Shaped Foil TechnologyTM. * 200C Tempera...
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Web results

Wholesale High Quality High Current Inductor Base ...


Mycoiltech
https://www.mycoiltech.com › high-current-inductor-bas...
Mycoiltech
https://www.mycoiltech.com › high-current-inductor-bas...
Wholesale high quality High Current Inductor Base at mycoiltech.com. Hefei Mycoil Technology Co.,Ltd. specialize in custom High Current Inductor Base,shop ...

SER80xx Series High Current Shielded Power Inductors


Coilcraft
https://www.coilcraft.com › high-current-flat-wire › ser
Coilcraft
https://www.coilcraft.com › high-current-flat-wire › ser
SER80xx Series high-current, high-inductance power inductors feature a flat-wire construction, resulting in exceptionally low DC resistance.Read more
$2.16 · Free delivery
Missing: Base ‎| Show results with: Base

High Current Flat Wire Inductors - TDK Product Center


TDK Product Center
https://product.tdk.com › products › inductor › inductor
TDK Product Center
https://product.tdk.com › products › inductor › inductor
TDK offers a wide range of high-current flat wire inductors. ERU inductors have compact dimensions due to flat helical winding with a rectangular wire, and ...Read more

WCM323 Series High Current Power Inductor


wcmagnetics.com
https://www.wcmagnetics.com › Power Inductors
wcmagnetics.com
https://www.wcmagnetics.com › Power Inductors
WCM323 series toroidal inductors are designed for switching power applications at frequencies up to 500 kHz This inductor has an outstanding current rating ...Read more

High Current Inductors for Server Power Applications


Eaton
https://www.eaton.com › electronic-components › topics
Eaton
https://www.eaton.com › electronic-components › topics
For high current, the two most common inductor core materials are ferrite and powder. Selection of the best core material occurs based on inductance, tolerance ...Read more
Missing: Base ‎| Show results with: Base

How to Make a High Current Inductor: A Step-by-Step Guide ...


magtechelec.com
https://www.magtechelec.com › News
magtechelec.com
https://www.magtechelec.com › News
Jan 12, 2026 — High-purity oxygen-free copper: The gold standard for high current inductors. It has ultra-low resistance, excellent conductivity, and good heat ...Read more
Discussions and forums
high current DIY inductors
EEVblog · 
6 years ago
high current DIY inductors
EEVblog · 
6 years ago
high current DIY inductors - Page 1. ... base core. But maybe the increased distance, the wider fringing ...  More
How reasonable is it to make a large (a few mH) inductor that can handle high current?
Reddit · 
r/ElectricalEngineering
 · 10+ comments
 · 1 year ago
How reasonable is it to make a large (a few mH) inductor that can handle high current?
Reddit · 
r/ElectricalEngineering
 · 10+ comments
 · 1 year ago
Can I use a higher current rating and saturation current rated inductor in ...
Electronics Stack Exchange · 
1 answer
 · 2 years ago
Can I use a higher current rating and saturation current rated inductor in ...
Electronics Stack Exchange · 
1 answer
 · 2 years ago

See more
Videos
Inductors in Power Electronics (Direct Current Control)
YouTube · ElectrArc240
Mar 5, 2023
YouTube · ElectrArc240
19:09
Inductors in power electronics help generate constant current from a constant voltage with minimal losses.
10 Tips to Build the Perfect Inductor (Like a Pro)
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Learn 10 tips for building inductors, including how core materials, air gaps, and winding techniques affect inductance.
Deep dive into an approximate inductor design using two ...
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Comparing two ferrite cores for inductor design: a smaller cross-section area requires a larger gap length.

View all

Web results

High Current Inductors in Power Systems: Design & ...


Custom Coils
https://www.customcoils.com › blog › high-current-indu...
Custom Coils
https://www.customcoils.com › blog › high-current-indu...
Oct 17, 2024 — Ferrite, powdered iron, and laminated steel are popular materials for constructing high current inductors. The right core material is essential ...Read more

Very High Current Power


Coil Winding Specialist
https://www.coilws.com › ...
Coil Winding Specialist
https://www.coilws.com › ...
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.Read more
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