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EPCOS Inductors & Ferrites

EPCOS offers a comprehensive range of inductors, common mode chokes, and ferrite components designed for power conversion and EMI filtering applications. Our magnetic components leverage advanced ferrite materials and optimized designs to deliver high efficiency, low losses, and reliable performance in demanding applications.

From power inductors for DC-DC converters to high-performance common mode chokes for telecommunications, EPCOS magnetic components provide the performance and reliability required for today's sophisticated electronic systems. Our portfolio includes standard products as well as application-specific solutions.

Key Features

  • Advanced ferrite materials for optimal performance
  • High saturation current ratings for power applications
  • Low core losses for efficiency optimization
  • Wide range of inductance and current ratings
  • AEC-Q200 qualified options for automotive applications
  • Comprehensive safety certifications
EPCOS Inductors and Ferrite Components

Product Categories

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Power Inductors

High-current power inductors for DC-DC converters and power supplies

  • High saturation and RMS current ratings
  • Low DCR for efficiency
  • Wide inductance range
  • Multiple package options
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Common Mode Chokes

High-performance EMI suppression components for differential and common mode noise

  • High common-mode impedance
  • Low differential-mode impact
  • Wide frequency range
  • Various current ratings
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Ferrite Materials & Cores

Specialized ferrite materials and cores for custom magnetic component designs

  • Multiple material options
  • Low loss at high frequencies
  • Temperature stable properties
  • Variety of shapes and sizes
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EMI Filter Components

Integrated solutions combining inductors with capacitors for system-level EMI performance

  • Coordinated component sets
  • Design-in assistance
  • Compliance-ready solutions
  • Multiple mounting options
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Power Inductors

EPCOS power inductors are designed for DC-DC converter applications in a wide range of electronic systems. These components feature high saturation current capabilities and low DC resistance to maximize efficiency while maintaining stable inductance performance under various current loading conditions.

The power inductor portfolio includes both standard products and application-specific solutions designed to meet the requirements of specific applications in automotive, industrial, and consumer markets.

Key Applications

  • Buck, Boost, and Buck-Boost converters
  • VRM (Voltage Regulator Module) applications
  • Point-of-load regulators
  • Motor drive applications
  • Power supply filtering

Technical Features

  • Advanced magnetic materials for low core losses
  • Optimized winding designs for low DCR
  • Enhanced thermal performance
  • Immune to magnetic interference
  • Robust mechanical construction
EPCOS Power Inductors

Typical Specifications

Current Ratings

0.5A to 60A depending on package and inductance

Inductance Range

0.1µH to 1000µH

DC Resistance

1mΩ to 1Ω depending on current rating

Operating Temperature

-40°C to +125°C

Common Mode Chokes

EPCOS common mode chokes provide effective suppression of common-mode noise while maintaining minimal impact on differential-mode signals. These components feature high common-mode impedance across wide frequency ranges with low differential-mode losses for optimal system performance.

Our common mode choke portfolio addresses applications from 50Ω to 2000Ω impedance levels with current handling capabilities from hundreds of milliamps to tens of amperes.

Key Applications

  • EMI filtering in power supplies
  • Telecommunications line filtering
  • Consumer electronics EMI compliance
  • Industrial equipment filtering
  • DC charging cable filtering

Performance Characteristics

  • High common-mode impedance (50Ω-2000Ω)
  • Low differential-mode insertion loss
  • Stable impedance over temperature
  • Excellent insertion loss characteristics
  • Multiple lead configurations
EPCOS Common Mode Chokes

Typical Specifications

Impedance Range

10Ω to 2000Ω at 100MHz

Current Rating

0.1A to 40A

Frequency Range

1MHz to 300MHz

Operating Temperature

-40°C to +125°C

Ferrite Materials & Cores

EPCOS ferrite materials are developed for specific requirements in power electronics and EMI applications. Our material portfolio includes options optimized for high-frequency performance, high-temperature operation, and low-core losses. The materials are available in various shapes and sizes for custom component designs.

Each ferrite material is designed to optimize different properties including permeability, saturation flux density, and temperature stability for specific application requirements.

Common Materials

  • N87: General purpose material for power applications
  • N97: High saturation flux density for power inductors
  • N49: High frequency applications up to 500kHz
  • N95: High permeability for inductors and transformers
  • PC47: Low loss at high temperatures

Core Shapes

  • Toroidal cores for minimal leakage flux
  • E-cores for transformer applications
  • RM-cores for high-power applications
  • Pot cores for EMI applications
  • Cylindrical cores for custom applications
EPCOS Ferrite Materials and Cores

Material Properties

Permeability Range

100 to 15000

Saturation Flux Density

0.3T to 0.5T

Curie Temperature

200°C to 250°C

Operating Temperature

-40°C to +150°C

EMI Filter Components

EPCOS EMI filter components combine magnetic and capacitive elements to provide integrated solutions for electromagnetic compatibility. These components simplify EMI compliance while optimizing board space and assembly costs.

Our EMI filter portfolio includes single-stage and multi-stage configurations using coordinated components for optimal performance across multiple frequency ranges.

Filter Types

  • Single-stage LC filters
  • Multi-stage differential filters
  • Common-mode filters
  • Combined CM/DM filters
  • High-pass and band-stop configurations

Performance Characteristics

  • Attenuation up to 80dB
  • Broad frequency effectiveness
  • Low insertion loss in passband
  • High voltage and current ratings
  • Multiple mounting options
EPCOS EMI Filter Components

Typical Specifications

Attenuation Level

20dB to 80dB

Frequency Range

150kHz to 1GHz

Current Rating

0.5A to 30A

Voltage Rating

250VAC to 600VAC

Application Examples

DC-DC Converter Design

Power inductor selection for synchronous buck converter

  • Inductance: 2.2µH
  • Current rating: 12A
  • Recommended: EPCOS power inductor series
  • Benefits: High efficiency, low DCR, compact size

Power Supply EMI Filter

Common mode choke for conducted emissions compliance

  • Impedance: 2000Ω at 100MHz
  • Current: 10A
  • Recommended: B78105 series
  • Benefits: High CM rejection, low DM insertion loss

Automotive EMI Solution

Ferrite cores for CAN/LIN bus filtering

  • Material: N87 for general applications
  • Shape: Toroidal for low leakage
  • Recommended: AEC-Q200 qualified options
  • Benefits: High reliability, automotive qualified

Telecom Line Protection

EMI filter for data line compliance

  • Configuration: Combined CM/DM filter
  • Current: 1.5A
  • Recommended: EPCOS integrated filter
  • Benefits: Space-saving, coordinated design

Technical Resources

Inductor Selection Guide

How to select the right inductor for DC-DC converter applications

Download Guide

Common Mode Choke Application Note

Design guidelines for EMI filtering with common mode chokes

Download Note

Ferrite Material Properties

Comparison of different ferrite materials and their applications

View Properties

EMI Filter Design Tool

Interactive tool for designing EMI filters with EPCOS components

Use Tool

Need Magnetic Component Selection Support?

Contact our technical team for assistance in selecting the optimal inductor or magnetic component for your specific application

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