The public sources reviewed for 2025 point to several distinct developments: high-current power delivery for AI systems, automotive communication components and smaller chip inductors. They do not establish a single growth rate for the whole inductor market. For engineering and procurement teams, the useful question is how each development changes the specifications and evidence required for a particular application.
This review uses selected manufacturer disclosures released in 2025, with an evidence cutoff of 2025-12-31. Sources were checked again on 2026-10-23. It is a historical review, not a 2026 market forecast or an independently measured market-size study.
Separate reported results, forecasts and product announcements
| Public evidence | What it supports | What it does not establish |
|---|---|---|
| TDK's briefing for the fiscal year ended March 2025 reported higher inductive-device sales and profit, with ICT and automotive gains alongside weaker industrial sales.[1] | A company-specific result with differing end-market trends | A calendar-2025 global growth rate or market share |
| TDK's 2025-11-28 Investor Day Q&A discussed demand for high-current CPU/GPU power-line components and future product expansion.[2] | Management's view of an application opportunity and development plans | Independently verified server-wide component counts or realized future revenue |
| Murata's 2025-01-07 announcement described a 006003-inch-class chip-inductor development.[3] | A miniaturization milestone at the development/prototype stage | General volume-production availability or suitability for power conversion |
| Murata announced automotive PoC and RF inductor series in February and March 2025.[4][5] | Specific product developments for vehicle communication applications | A universal number of inductors per vehicle or an industry-wide qualification |
These examples are selected evidence, not a supplier ranking. Manufacturer disclosures are primary sources for what those companies reported; their commercial perspective and product scope still need to be considered.
AI power delivery: compare performance at the working point
TDK's November Q&A identifies high-current CPU/GPU power delivery as an area of interest.[2] The practical sourcing implication is to ask which electrical and thermal requirements a candidate part can meet in the proposed circuit. It is not sufficient to label a component “for AI servers.”
For a power-stage comparison, record inductance under DC bias, peak current, RMS current, DCR at a stated temperature, loss under the intended waveform, and the available cooling and mounting space. Identify the manufacturer's definition of each current limit. A higher catalog current number can be misleading if the permitted inductance drop or temperature-rise criterion differs.
The reviewed sources do not substantiate the earlier claim that AI servers use a fixed multiple of the inductors in conventional servers. Such a comparison would require defined server configurations and comparable bills of materials. That multiplier is removed.
Automotive electronics: distinguish power, PoC and RF functions
An automotive power inductor, a Power over Coax (PoC) inductor and an RF matching inductor solve different problems. Murata's February announcement concerns the LQW32FT_2H PoC series, while the March announcement concerns the LQP02HQ_Z2 RF series.[4][5] Neither announcement describes all automotive inductors.
For PoC and RF designs, examine impedance or Q over the relevant frequency range, self-resonance, DC current, footprint and the actual interface requirements. For power conversion, examine bias-dependent inductance, loss and thermal limits. Obtain qualification evidence for the exact part and revision being evaluated. A qualification statement for one series does not qualify a supplier's whole catalog or a finished vehicle system.
The earlier per-vehicle quantity and automotive-segment growth figures are removed because no traceable counting method or original statistical source was provided.
Miniaturization: read the dimensions and development status
Murata's January announcement specifies a 006003-inch-class chip-inductor prototype with dimensions of 0.16mm × 0.08mm.[3] The earlier article associated that size designation with 0.6mm × 0.3mm; that association was incorrect.
The more useful engineering question is what must change in the assembly and circuit when a smaller part is considered. Check the exact dimensions, land pattern, placement capability and the electrical data at the intended frequency. A miniature chip-inductor development is not evidence that a high-energy power inductor can be reduced to the same scale. A prototype announcement also does not establish current stock or an approved production alternative.
Why this revision does not give one global market-size figure
The previous article combined an approximately USD11 billion starting value, a USD15.8 billion endpoint and a 3–5% CAGR. If those endpoints describe the same market over five years, the arithmetic gives:
CAGR = (15.8/11)^(1/5) − 1 ≈ 7.51%This is a consistency check on the old numbers, not a corrected market forecast. Their underlying sources and definitions were not established, so the figures are removed from the market assessment rather than replaced by the calculated rate.
Before using an external market estimate, record the publisher, report date, product scope, geography, base year, forecast interval and currency basis. Check whether it includes RF inductors, power inductors, common-mode chokes, integrated magnetics or other devices. Revenue, unit shipments and installed components are different measures and should not be combined without a stated method.
A sourcing checklist that follows from the evidence
- Classify the circuit function before building a supplier shortlist.
- Compare exact part numbers using the same frequency, bias, temperature and acceptance criteria.
- Separate an announced development from a released series, a quoted production part and an application-approved part.
- Request current drawings, data sheets, applicable qualification records, lifecycle information and a sample plan.
- Evaluate samples in the intended circuit and obtain current availability and pricing directly from the supplier or distributor.
Use the Magdir datasheet directory to organize the initial search and the alternative-comparison tool to record differences. Inclusion in a directory or similarity in nominal specifications does not establish interchangeability.
Sources and revision
- TDK: Fiscal Year March 2025 Full Year Performance Briefing, “Passive Components segment – Full year.”
- TDK Investor Day, 2025-11-28: Q&A, Q3/A3.
- Murata, 2025-01-07: 006003-size chip-inductor development.
- Murata, 2025-02-28: Automotive PoC inductors.
- Murata, 2025-03-05: Automotive High-Q RF inductors.
Revised on 2026-10-23 with AI-assisted editorial and language review. This edition replaces unsupported totals, growth rates, component-count claims and investment recommendations with attributed evidence and sourcing analysis. It contains no original market survey, independent product tests or supplier endorsement.
