Magnetic Products

With more than 50 years of Magnetic components experience, Bourns offers a broad, proven and continually expanding portfolio of catalog and modified standard products as well as extensive capabilities for the development of fully customized components. Our advanced magnetics components are designed to meet essential power application requirements for:
  • Power conversion
  • Isolation
  • EMC compliance
  • Signal integrity
  • Increased power density
Helping to ensure efficient and safe, highly reliable power, Bourns Magnetics are key elements in many of today’s breakthrough electric vehicle, high power battery charging, e-mobility, renewable energy, energy storage, Internet of Things (IoT) and industrial infrastructure designs.


We developed our comprehensive Magnetics line to make it easy for circuit designers to select the right components to meet their increasingly complex and demanding application requirements. And, our roadmap remains strong in addressing next-generation application needs.

Contact Bourns today for your Magnetic component requirements.

Bourns Catalog Magnetic Components

Global in size and strength, we offer worldwide tech support backed by our regionally based R&D centers and multiple manufacturing facilities in Asia, Europe and North America.

Bourns® Standard Magnetic Components 

custom magentic pillars01For today’s rugged design requirements, we offer a full range of automotive grade Magnetics components   
  • High creepage and clearance isolation transformers
  • BMS signal transformers
  • Chip LAN transformers
  • Power inductors
  • AEC-Q200 High Current Common Mode Chokes
  • Bourns has AEC-Q200 testing in-house
  • IATF 16949 and ISO 14000 certified factories

Bourns Magnetics Design Differentiators

Design Lab

Our extensive Magnetics experience allows us to meet the requirements in today's designs that operate at higher switching frequencies, require ever-more component performance support and are continually shrinking in size.
  • Miniaturization – Smaller form factors for space-constrained designs
  • Low EMI noise – Inductors that mitigate EMI noise while maintaining high efficiency
  • Thermal management – Industry leading temperature stability
  • High robustness and reliability -- Helps maximize product lifespan
  • Advanced materials and construction for highly efficient and ultra-low DC resistance –
    1. advanced metal alloy powder cores
    2. molded construction techniques
    3. flat windings
    4. self-lead terminals

Custom Magnetic Capabilities

From Design to Spec and Build to Print -- all the way to Volume Production.

Bourns' custom Magnetics team can design and manufacture transformers and inductors for almost any power level, helping designers meet their application specific requirements. Customers are able to leverage Bourns' engineering expertise and advanced software design tools to expedite the development an optimized design. Plus, our engineering lab can provide fast turnaround prototype samples and manufacturing to support volume production goals.

The proof is in the thousands of successful fully custom designs Bourns has delivered: 

  • High power SMPS transformers (1 kilowatt to high power 25 kilowatt and higher)
  • High voltage isolation, TH and SMT transformers to meet UL and IEC requirements
  • SMPS transformer designs for a wide range of operating frequencies
  • High current inductors for any Magnetics application
  • Semi and fully customized EMC/EMI components

Key expertise includes:
  • Fast prototypes
  • Ferrite core manufacturing
  • Designs for EMI reduction
  • Expertise in thermal management
  • Engineering support for finite element analysis and simulations
  • Comprehensive custom design capabilities including:
    • standard and custom bobbins and cores
    • aluminum housings
    • thermally conductive potting
    • Litz wire
    • flat wire windings


Agency Standards Compliance
Bourns designs for compliance with UL and IEC safety standards for isolation and creepage and clearance. We can also meet customers’ strict automotive grade requirements including AEC-Q200 and PPAP.

Reference Designs
Helping our customers save time and minimize risk, we also have reference designs with major IC manufacturers such as Texas Instruments, ADI and PI.

Year Semiconductor Company IC Part Number IC Technology Application Bourns Part Number Reference
2021 TI TPA6304-Q1 Si Automotive Class D Amplifier SRP5015TA-R15Y TPA6304-Q1 Evaluation Module
2021 TI TPA6304-Q1 Si Automotive Class D Amplifier SRP5015TA-20Y TPA6304-Q1 Evaluation Module
2021 TI TPA6304-Q1 Si Automotive Class D Amplifier SRP5015TA-R22Y TPA6304-Q1 Evaluation Module
2021 TI TPA6304-Q1 Si Automotive Class D Amplifier SRP5015TA-R33M TPA6304-Q1 Evaluation Module
2021 TI SN6501-Q1 Si Isolated Power Supplies HCTSM8 SN6501-Q1
2021 ADI ADBMS6830M Si Automotive BMS SM91501ALE LTC6812-1
2021 ADI ADBMS6822 Si Automotive BMS SM91501ALE LTC6812-1
2021 PI INN3996CQ Si High voltage input automotive isolated DC-DC Power Supply SRP4020TA-1R5M DER-889Q
2021 PI LNK3302D Si Home and Building Automation RL875-222K-RC DER-865
2021 PI INN3977CQ Si OBC, BMS, DC-DC SRP4020TA-1R5M RDR-840Q
2021 PI INN3679C-H606 GaN 65 W isolated flyback general purpose adapter RLB0914-470KL DER-713

Conflict Mineral Source Reporting for Magnetics & JW Miller® products CFSI_CMRT

Magnetics Parametric Search

With the acquisition of J.W. Miller® Magnetics Division of Bell Industries, Inc., Bourns customers are now supported with a complete line of high-quality coils, chokes, inductors and transformers in both surface mount and through-hole. Our world-class technology and applications expertise is the result of years of magnetic component engineering, design and support. Bourns' global reputation for quality products, extensive magnetic knowledge and range of technologies ensures the right solution for your needs.

Bourns, with over 50 years of expertise, provides a large, proven, and constantly developing range of magnetic components. Our advanced magnetics components are engineered to address critical power application needs such as power conversion, isolation, EMC compliance, signal integrity, and increased power density.

Bourns magnetics are crucial components in many of today's breakthrough electric car, high power battery charging, e-mobility, renewable energy, energy storage, Internet of Things (IoT), and industrial infrastructure designs, helping to guarantee efficient and safe, highly dependable power.

The extensive magnetics range makes it simple for circuit designers to choose the proper components to meet their increasingly demanding application requirements. These include specifications like miniaturization, which is a smaller form factor for space-constrained designs; low EMI noise inductors that mitigate EMI noise while maintaining high efficiency; thermal management for temperature stability; high robustness and reliability to maximize product lifespan; advanced materials and construction for highly efficient and ultra-low DC resistance.

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Inductor library

Cross Reference Search by Part Number

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Parametric Search

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