Research firm MarketsandMarkets said on August 28, 2026 that the global laminated busbar market will grow from USD 1.13 billion in 2026 to USD 2.13 billion by 2035, a compound annual growth rate (CAGR) of 7.3%. The firm puts the 2025 base at USD 1.02 billion and covers the years 2022 through 2035 in a 295-page report containing 195 data tables and 75 figures.

Within that forecast, North America is called the fastest-growing region at a 7.8% CAGR, Europe the second-largest region overall. Copper led by conductor material in 2025 and polyester by insulation material, while polyimide insulation is projected to grow fastest at 9.7%. Switchgear and power distribution was the largest application segment in 2025; utilities and grid infrastructure accounted for 20.6% of the market by end-user industry. Named suppliers include Amphenol, Methode Electronics, Mersen, Rogers, Sun King Technology Group, Zhuzhou CRRC Times Electric and Ryoden Kasei.

Executive Summary

A laminated busbar is not a glamorous product. It is a stack of flat copper or aluminium conductors separated by thin insulating film and bonded into a rigid sandwich, used in place of a bundle of cables to carry current between power-electronic components. Because the conductors sit close together in parallel planes, the assembly has very low inductance — meaning it resists sudden changes in current far less than a cable loop does — which lets switching devices run faster and cooler. That physics is why the part is quietly becoming a design constraint rather than a catalogue purchase.

The headline forecast is a near-doubling of a small market: roughly $1 billion today to roughly $2 billion in a decade. The more interesting content sits in the segment detail. The above-3,000-amp current-rating band is projected to grow at 8.3%, faster than the market as a whole, and polyimide — a high-temperature insulating film used where polyester film would soften — at 9.7%. Both are thermal signals. They say that a growing slice of demand is coming from equipment running hotter and harder than the average installed base.

For infrastructure buyers, the practical reading is about supply relationships rather than market size. The release describes a shift toward co-engineered busbars designed around a specific customer’s mechanical layout, which converts a commodity part into a single-sourced, tooling-bound component with real switching costs. That is a procurement and continuity question worth asking before the part is designed in, not after.

The Conductor Becomes a Design Decision

The economic argument for a laminated busbar has always been assembly, not electricity. Replacing a hand-built harness of cables, lugs and terminals with one bonded plate removes labour hours, removes the variance between one technician’s build and the next, and removes the tolerance stack-up that makes high-volume electrical assembly expensive to test. The release frames this directly: manufacturers want solutions that simplify assembly, improve consistency and use space efficiently. In a factory producing thousands of identical power converters, repeatability is worth more than copper savings.

The second argument is electrical, and it is the one that scales with power density. Parallel plate geometry cancels much of the magnetic field between the conductors, cutting stray inductance. Lower inductance means lower voltage overshoot when a semiconductor switches off, which means the designer can either switch faster, run at higher voltage, or specify a smaller and cheaper device for the same job. As silicon carbide and other wide-bandgap semiconductors push switching frequencies up, the interconnect stops being neutral plumbing and starts setting the ceiling on what the rest of the design can do.

That is the structural reason a low-single-digit-billion component market is worth watching from an infrastructure seat. The busbar is a small line item that gates the performance of a much larger one. Buyers who treat it as a commodity late in the design cycle tend to discover the constraint at thermal validation, when changing it is most expensive.

What the Forecast Actually Supports

The arithmetic is internally consistent: $1.13 billion compounding at 7.3% over the nine years to 2035 does land near $2.13 billion, so the headline is not a rounding artefact. The segment CAGRs are also coherent with each other — high-current, high-temperature and North American growth all running above the blended rate is the pattern you would expect if electrification and power-electronics density are the underlying drivers.

Two things are worth flagging plainly. First, the step from the stated 2025 base of $1.02 billion to $1.13 billion in 2026 is about 10.8% growth, noticeably above the 7.3% rate forecast for the following decade. That implies a near-term acceleration followed by moderation, which may well be the firm’s considered view, but the release does not explain it. Second, the release names an application segment — EV chargers — as the fastest-growing, but gives the window as 2026–2031 in the subheading and 2026–2035 in the body. One of those is a typographical slip; a reader cannot tell which, and the two imply different demand curves.

None of this makes the forecast wrong. It makes it unverifiable from the material provided, which is the normal condition for a press release whose function is to sell a 295-page report. The honest position is that the segment mix is a plausible and useful directional signal, and the specific dollar figures are a vendor estimate that no reader can independently reconstruct.

Above 3,000 Amps: Reading the Thermal Signal

The single most informative number in the release may be the 8.3% CAGR attached to the above-3,000-amp current-rating band. Very high current at modest voltage is the signature of DC distribution inside dense equipment — battery systems, energy storage, fast-charging stacks, and the low-voltage DC rails that feed racks of processors. Current heats a conductor in proportion to the square of its magnitude, so every step up in amperage makes the conductor’s cross-section, surface area and thermal path a harder problem than the step before it. Polyimide’s projected 9.7% growth points the same way: designers reach for a costlier, higher-temperature film when they have run out of thermal headroom, not when they have plenty.

It is worth being precise about what the release does and does not say here. It does not mention data centres or AI infrastructure anywhere. The named end-user concentration is utilities and grid infrastructure at 20.6% in 2025, with switchgear and power distribution the largest application and EV charging the fastest-growing one. The connection between rising rack power density and high-current busbar demand is an inference drawn from the shared physics and the shared supplier base, not a claim the report makes.

That inference is still worth making, because the constraint travels. Whoever is building 350 kW charging stalls, grid-scale storage inverters and high-current server power shelves is buying from an overlapping pool of copper, polyimide film, lamination presses and press-brake capacity. If charging and storage demand grows at the rates forecast here, data-centre power teams will feel it as lead times and qualification queues in a component category most of them have never had to plan around.

Co-Engineering Rewrites the Supplier Relationship

The release’s clearest strategic claim is that demand is shifting toward co-engineered busbars developed around a customer’s specific mechanical layout, conductor arrangement and insulation requirements, with competition moving to design support, prototyping, testing and production scalability. That description matters more than the market size. A part designed around one enclosure is, in practice, single-sourced. Requalifying a second supplier means new tooling, new dielectric and thermal validation, and often a schedule slip measured in quarters.

The winners in that model are suppliers with engineering staff sitting alongside customer design teams early — which favours incumbents with scale, and the named list spans the US (Amphenol, Methode Electronics, Rogers), France (Mersen), China (Sun King Technology Group, Zhuzhou CRRC Times Electric) and Japan (Ryoden Kasei). The release gives no revenue or share figures for any of them, so the competitive ranking within that group is not established by this material. The losers are generic fabricators competing on price per kilogram of copper, and buyers who let a sole-source dependency form without pricing it.

There is a geographic dimension too. Design-stage collaboration is easier when the supplier is reachable, which is one plausible reason North America is forecast to grow fastest, alongside its build-out of charging and grid equipment. But co-engineering also deepens exposure: a supplier chosen for its engineering depth is harder to replace if tariffs, export controls or a plant outage intervene. The mitigation is unromantic and should happen at design time — dual-qualify where volume justifies it, keep the mechanical interface documented independently of the supplier’s CAD, and price continuity into the award rather than the unit cost alone.

Background

Busbars are the workhorses of electrical distribution: solid conductors that carry current between components where cables would be bulky, lossy or hard to route. Laminated busbars are the engineered end of that category, developed originally for aerospace and traction applications where space, weight and switching performance all mattered at once. They spread into industrial drives, then into electric vehicles, renewable inverters, battery storage and switchgear as power electronics moved to higher voltages and faster semiconductor switching.

MarketsandMarkets is a business-to-business research and growth-consulting firm that publishes syndicated market forecasts across technology and industrial sectors, promoting them through wire releases like this one. Its figures are vendor estimates rather than audited or regulatory data; the value to a general reader lies mainly in the segment structure and directional signals, which should be weighed alongside supplier disclosures and buyers’ own procurement experience.

Source: Laminated Busbar Market worth $2.13 billion by 2035 | MarketsandMarkets — an August 28, 2026 PR Newswire release summarising the research firm’s paid forecast of the global laminated busbar market through 2035.