ITP SERIES: THT High-Current Powdered-Iron Toroidal Inductors

  • Soft DC Saturation
  • Self-shielding Design
  • Inductance: Up to 1150 uH
  • DCR: 300 mΩ Max
  • ISAT : Up to 20 A

I02 SERIES: THT High-Current Powdered-Iron Power Inductors

  • Compact Design
  • High Saturation Current
  • Inductance: Up to 1.98 μH
  • DCR: 3.00 mΩ Max
  • ISAT : Up to 60 A

I03 SERIES: THT High-Current Powdered-Iron Power Inductors

  • Compact Design
  • High Saturation Current
  • Inductance: Up to 6.16 μH
  • DCR: 7.66 mΩ Max
  • ISAT: Up to 50 A

Technical Highlights

  • Energy storage for high-current power applications
  • Powdered iron core for soft saturation and stable DC bias performance
  • High saturation current capability for demanding load conditions
  • Low DCR windings to minimize conduction losses
  • Suitable for typical switching-frequency ranges found in SMPS designs
  • Toroidal and molded core options for controlled EMI performance
  • Robust through-hole construction for mechanical stability
  • Broad inductance range for flexible design requirements
  • Optimized for efficient power conversion stages

Typical Applications

  • DC-DC converters and voltage regulator modules (VRMs)
  • Buck, boost, and POL converters
  • High-current output filtering and energy storage
  • Industrial and telecom power systems
  • Server and distributed power architectures
  • Embedded and board-level power supplies
  • General high-current filtering in switching regulators
Part Number Drive Inductance (μH, Min) Turns Ratio (Pri:Sec1:Sec2) DCR (mΩ, Max) ET Product (V-μs, Max) Leakage Inductance (nH, Min) SRF (MHz,Typ) Hi Pot (Drive:Gate)(Vdc) Length (mm, Max) Width (mm, Max) Height (mm, Max) Creepage (mm, Min) Mounting Type Pick & Place TI Product Compatibility Infineon Product Compatibility Samples Availability Mouser Availability

Custom Solutions & Capabilities

ICE develops custom high current inductors for demanding power conversion stages that require robust mechanical stability and strong DC bias performance. Core selection, wire gauge, winding configuration, and saturation current can be optimized to meet specific efficiency, thermal, and space constraints.

From powdered iron to toroidal geometries, we engineer inductors to deliver controlled EMI, predictable inductance under load, and low DCR performance. Custom inductance values and current ratings are available to support VRMs, industrial power supplies, and high-current filtering applications.

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Frequently Asked Questions (FAQs)

What defines saturation current in powdered iron cores?

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Saturation current is the DC current level where inductance begins to decrease due to core saturation. Powdered iron materials provide soft saturation characteristics, allowing inductance to decrease more gradually under high load conditions. This helps improve stability in high-current switching regulators and power conversion stages.

How does DCR impact efficiency?

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Lower DCR reduces conduction losses and heat generation in the inductor winding. This improves overall converter efficiency, especially in high-current applications where I²R losses become significant. Low-DCR inductors also support better thermal performance in compact power designs.

Why choose toroidal geometry?

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Toroidal inductors help contain magnetic flux within the core structure, reducing EMI radiation and coupling into nearby circuits. They also provide efficient magnetic path utilization and strong mechanical stability for high-current applications.

How does DC bias affect inductance?

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Increasing DC current reduces effective permeability, causing inductance to drop under load. Powdered iron cores maintain more predictable inductance under DC bias because of their distributed air-gap structure, making them suitable for energy storage applications.

What causes audible noise?

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Audible noise is typically caused by core vibration, winding movement, or magnetostriction under switching conditions. High ripple current and poor mechanical stabilization can increase acoustic noise in power converter designs.

How do I select inductance for ripple targets?

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Inductance selection depends on switching frequency, operating voltage, and allowable ripple current. Higher inductance reduces ripple current, while lower inductance improves transient response. The optimal value depends on efficiency, thermal, and space constraints.

Can they operate at high ambient temperatures?

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Yes. Powdered iron inductors are commonly used in industrial and high-power systems operating at elevated ambient temperatures. Actual performance depends on thermal rise, airflow, core material, and PCB layout conditions.

What is the difference between saturation current and rated current?

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Saturation current defines when inductance drops due to magnetic saturation, while rated current is based on allowable temperature rise. Both parameters should be evaluated when selecting inductors for high-current operation.

How does core material influence efficiency?

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Core material affects core loss, saturation behavior, and DC bias stability. Powdered iron cores are widely used because they provide soft saturation characteristics and stable performance in high-current switching applications.

Are they suitable for continuous high-current operation?

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Yes. High-current powdered iron inductors are designed for continuous operation in VRMs, industrial power supplies, and DC-DC converters. Proper thermal management and current derating help ensure long-term reliability.