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Finding the right copper shunt manufacturer is harder than it looks—drawings are ready, current is defined, yet the flexible connection still has to fit, flex, and carry load without becoming the weak point in the panel. In 2026, OEM builders, switchgear makers, and industrial buyers are sourcing more custom laminated and braided shunts as equipment runs hotter, packs tighter, and ships globally.
This guide answers a practical question: which copper shunt manufacturers and suppliers are worth contacting when you need bulk supply, drawing-based customization, or a factory that can scale from prototype to repeat production? Across switchgear, transformers, battery storage, and heavy electrical equipment, demand keeps shifting toward flexible power connections built to spec—not off-the-shelf parts forced into the wrong slot. If you are comparing vendors before sending an RFQ, start here:
Below, we profile ten established copper shunt manufacturers—what each factory builds, who they serve, and where they fit in a real sourcing decision—because the wrong supplier costs more in rework than in price; read on to compare options and find the right match for your project.
Table of Contents
Editorial Selection, Not a Paid Ranking: Companies here are copper shunt manufacturers and suppliers commonly reviewed by OEM buyers, panel builders, and industrial procurement teams in 2026. Selection is based on public product scope, custom capability, industry fit, geographic access, and track record in flexible power connections—not paid placement or hidden commercial deals.
Each company below was reviewed against six practical criteria—the same ones a buyer uses when narrowing a long supplier list to two or three RFQs.
| Selection Criteria | What Buyers Usually Check |
|---|---|
| Product range | Braided, laminated, press-welded, insulated—can one supplier cover your connector type? |
| Custom capability | Drawing-based OEM, prototypes, repeat bulk—critical when no catalog part fits the panel slot. |
| Manufacturing scope | In-house welding, machining, plating, testing—fewer handoffs, fewer surprises at final assembly. |
| Industry fit | Switchgear, transformers, BESS, welding, utilities—experience in your application matters. |
| Market access | Catalog plus distributor stock vs factory-direct export—depends on urgency and order size. |
| Experience | Years in business and application focus—a 1922 fabricator and a 2014 foil welder solve different problems. |
Rank order reflects readability and buyer research flow, not a performance score. nVent ERIFLEX opens the list as a globally recognized brand with broad catalog coverage; specialized and regional copper shunt manufacturers follow based on the sourcing scenarios they serve best.
| Brand | Headquarters | Specialty |
|---|---|---|
| 1. nVent ERIFLEX | London, UK | Global catalog braided & press-welded shunts; custom flexible bus connections |
| 2. Storm Power Components | Tennessee, USA | U.S. made-to-order laminated shunts; in-house welding, machining & plating |
| 3. American Power | USA | Drawing-based laminated shunts & flexible connectors for OEM bulk supply |
| 4. Rosen Welding | Jiangsu, China | Foil laminated shunts for resistance welding, battery & power equipment |
| 5. Erie Industrial Products | Ohio, USA | Custom braided & laminated shunts; ISO-oriented U.S. OEM fabrication |
| 6. Nu-Core | Michigan, USA | Heavy-industry high-current shunts; water & air-cooled copper jumpers |
| 7. KINTO Power | Shanghai, China | Export OEM laminated shunts & press-welded connectors for power gear |
| 8. Seedorff ACME | Indiana, USA | Long-established U.S. custom laminated shunts to customer drawings |
| 9. Hubbell | Connecticut, USA | Catalog braid jumpers & grounding shunts via global distributor network |
| 10. SHZHJ | Shanghai, China | Factory-direct OEM/ODM flexible, braided & laminated shunts at scale |
Overview:
For procurement teams comparing established copper shunt manufacturers, nVent ERIFLEX stands out as a global brand backed by a broad catalog of flexible power connections rather than a single product line. The ERIFLEX portfolio covers braided copper shunts, press-welded power shunts, insulated braided conductors, and flexible busbar-style solutions that electrical panel builders, switchgear OEMs, and equipment manufacturers routinely specify for low-voltage power interconnection. Buyers who need both off-the-shelf copper shunt supply and drawing-based customization can work from standardized conductor constructions while requesting tailored palm sizes, hole patterns, and assembly lengths. That combination of catalog depth and engineering-backed manufacturing makes nVent ERIFLEX a practical copper shunt supplier when project timelines, brand traceability, and repeatable bulk sourcing matter as much as product performance.
Specialty: Flexible copper shunt, braided copper shunt, press-welded power shunts, insulated braided conductors, flexible busbars, custom copper shunt solutions
Key Industries: Switchgear, power distribution, electrical panel manufacturing, renewable energy, transportation, industrial automation, transformer systems
Establishment: ERIFLEX brand established in 1972 (now part of nVent)
Headquarters: London, United Kingdom (nVent)
Official Website: www.nvent.com
Overview:
Storm Power Components operates as a U.S. copper shunt manufacturer built around made-to-order production rather than mass catalog sales, which suits OEM buyers replacing rigid busbar runs with flexible laminated copper shunts. Its factory handles copper fabrication, press welding, CNC machining, plating, and testing under one roof, so switchgear builders, substation contractors, and generator OEMs can source drilled terminal pads, custom stack thickness, and application-specific lengths without splitting orders across multiple vendors. Storm Power is especially relevant for North American copper shunt suppliers and manufacturers searches where local fabrication, responsive quoting, and shorter production cycles weigh heavily in vendor selection.
Specialty: Laminated copper shunts, flexible copper shunt, custom copper busbars, braided copper connectors, press-welded electrical shunts
Key Industries: Switchgear, substations, transformers, power distribution, generators, industrial electrical equipment
Establishment: 1987
Headquarters: Tennessee, United States
Official Website: www.stormpowercomponents.com
Overview:
American Power fits buyers who already have a copper shunt drawing and need a manufacturing partner to turn it into a repeatable bulk supply item. The company builds laminated copper shunts and flexible electrical connectors for high-current equipment used in switchgear, power generation, renewable energy, transportation, and industrial electrical systems, with production aligned to customer specifications rather than fixed catalog sizes. Its role as a copper shunt supplier is closely tied to OEM workflows—reviewing conductor layout, confirming terminal details, and manufacturing flexible connections that accommodate movement and expansion inside enclosed assemblies. That drawing-first approach helps equipment manufacturers consolidate flexible bus connection sourcing with a single U.S.-based factory contact.
Specialty: Laminated copper shunts, flexible copper connectors, custom copper shunts, electrical bus connections
Key Industries: Power generation, switchgear, renewable energy, industrial equipment, transportation
Establishment: 1980
Headquarters: United States
Official Website: www.american-power.com
Overview:
Rosen Welding is a China-based copper shunt manufacturer whose production center is laminated flexible connectors made from high-conductivity electrolytic copper foil joined by pressure welding—a process choice that matters when buyers need thin, highly flexible stacks rather than heavy braided jumpers. The factory supports OEM programs with custom foil thickness, hole drilling, terminal shaping, and surface finishing for resistance welding machines, transformers, switchgear, battery systems, and generator sets. Rosen Welding is worth shortlisting for international copper shunt suppliers comparing export-oriented manufacturers that focus on engineered assemblies instead of stocking generic connectors, particularly where resistance welding power paths and battery interconnect layouts drive the specification.
Specialty: Laminated copper shunt, flexible copper shunt, braided copper connector, laminated busbar, battery copper connector
Key Industries: Resistance welding, switchgear, transformers, battery systems, generators, renewable energy
Establishment: 2014
Headquarters: Jiangsu, China
Official Website: www.rosenweld.com
Overview:
Erie Industrial Products positions itself as a drawing-driven copper shunt manufacturer for OEMs, contractors, and integrators who cannot use standard catalog jumpers in switchgear, transformer, telecom grounding, or renewable energy enclosures. Production at its Ohio facility covers braided copper shunts, press-welded laminates, flexible bus bars, and related custom copper assemblies, with in-house machining, forming, plating, resistance testing, and first-article inspection supporting bulk orders from prototype through volume runs. Buyers evaluating copper shunt suppliers for customized power distribution hardware often look here when they need an ISO-compliant U.S. factory that treats each shunt as an engineered component rather than a commodity SKU.
Specialty: Braided copper shunts, flexible copper shunt, press-welded copper laminates, flexible bus bars, custom copper connectors
Key Industries: Power distribution, switchgear, transformers, telecommunications, renewable energy, grounding systems, electrical OEM manufacturing
Establishment: 1993
Headquarters: Oberlin, Ohio, USA
Official Website: www.erieindustrialproducts.com
Overview:
Nu-Core brings one of the longest track records on this list to buyers sourcing copper shunt manufacturers for extreme current environments. Since 1956, the Dearborn-based company has built high-current bus systems alongside laminated copper shunts, braided copper shunts, and water-cooled or air-cooled copper jumpers used in steel mills, chemical plants, chlorine production, fiberglass lines, and other heavy industrial sites where downtime from a failed flexible connection is costly. Nu-Core’s value to wholesale and OEM buyers lies in application experience at very high ampacity—helping define conductor sizing, cooling method, and assembly layout before the factory fabricates the finished jumper. That makes Nu-Core a strong copper shunt supplier reference point when the requirement goes beyond panel-level flexibility into process-industry power delivery.
Specialty: Flexible copper shunts, laminated copper shunts, braided copper shunts, water-cooled copper jumpers, electrical bus systems
Key Industries: Steel manufacturing, chemical processing, fiberglass, mining, power transmission, heavy industry
Establishment: 1956
Headquarters: Dearborn, Michigan, USA
Official Website: www.nu-core.com
Overview:
KINTO Power is a Shanghai copper shunt manufacturer serving export and domestic OEM programs that need laminated flexible connectors built from high-purity copper using press welding, brazing, riveting, and related joining methods chosen to match each electrical and mechanical requirement. Its factory produces custom copper shunt batches for transformers, substations, switchgear, generators, and power-plant equipment, with options for conductor cross-section, plating, insulation, and terminal geometry supplied against customer drawings. Importers comparing international copper shunt suppliers often evaluate KINTO when they want factory-direct pricing on flexible laminated assemblies for power distribution hardware, combined with the ability to scale from sample quantities to recurring wholesale production.
Specialty: Laminated copper shunts, flexible copper shunt, custom copper shunt, copper busbars, press-welded flexible connectors
Key Industries: Power plants, substations, transformers, generators, switchgear, industrial electrical equipment
Establishment: 2002
Headquarters: Shanghai, China
Official Website: www.kintopowerconnect.com
Overview:
Tracing its roots to 1922, Seedorff ACME is among the older U.S. names buyers encounter when researching copper shunt manufacturers for legacy and new-build electrical equipment alike. The South Bend factory builds custom laminated copper shunts to customer drawings for switchgear, transformers, generators, and industrial power gear, emphasizing fit-for-purpose dimensions and terminal layouts over standardized shelf products. Contractors and OEM purchasing teams frequently contact Seedorff ACME when they need a copper shunt supplier with long-standing metal-fabrication heritage and the ability to reproduce or upgrade flexible connections inside existing high-current installations without redesigning the entire bus path.
Specialty: Laminated copper shunts, flexible copper shunt, custom electrical connectors, laminated conductors
Key Industries: Switchgear, transformers, generators, power distribution, industrial electrical equipment
Establishment: 1922
Headquarters: South Bend, Indiana, USA
Official Website: www.seedorffacme.com
Overview:
Hubbell appears on copper shunt manufacturer shortlists for a different reason than custom fabricators: it is a large electrical infrastructure brand whose distribution reach and specification history matter to utility, substation, telecom, and commercial project buyers. Through its power connection product lines, Hubbell supplies braid jumpers and shunts used in grounding, bonding, and distribution assemblies where approved vendor lists and nationwide availability often outweigh fully custom lamination. Procurement teams treating Hubbell as a copper shunt supplier typically do so when they need proven connectors from an established manufacturer with broad catalog support, distributor stocking, and the backing of a company founded in 1888 rather than a single-product job shop.
Specialty: Braid jumpers, copper shunts, grounding connectors, bonding products, electrical infrastructure solutions
Key Industries: Utilities, substations, telecommunications, industrial facilities, electrical infrastructure
Establishment: 1888
Headquarters: Shelton, Connecticut, USA
Official Website: www.hubbell.com
Overview:
SHZHJ is a Shanghai-based copper shunt manufacturer and factory-direct supplier built for OEM, ODM, and distributor programs that need flexible copper shunt, braided copper shunt, and laminated copper shunt assemblies produced from customer drawings rather than fixed catalog parts. In-house capabilities span copper processing, welding, machining, surface finishing, inspection, and final assembly, allowing switchgear builders, energy-storage integrators, EV charging equipment makers, rail suppliers, and transformer OEMs to place bulk orders with control over dimensions, plating, insulation, and terminal design. Buyers searching copper shunt suppliers for wholesale manufacturing partnerships often review SHZHJ when they want one factory contact covering prototype samples through volume production with engineering input across the full project cycle.
Specialty: Flexible copper shunt, braided copper shunt, laminated copper shunt, flexible copper connectors, custom copper braid assemblies
Key Industries: Switchgear, renewable energy, battery energy storage systems, EV charging, rail transit, transformers, industrial automation
Establishment: 2007
Headquarters: Shanghai, China
Official Website: www.lococontact.com
Start with what the conductor must carry and how it must move inside the enclosure.
These items separate a catalog reseller from a copper shunt manufacturer that can own your repeat program.
Real-world tip: A BESS integrator once sent only a length and current rating. The factory quoted fast—but the shunt fouled a cabinet door because bend radius was never defined. Add one sketch dimension and the second quote usually lands right.
Copy these into your first supplier email. Good copper shunt manufacturers answer them without hesitation.
| Question | Why It Matters |
|---|---|
| Do you build from customer drawings? | Confirms true custom manufacturing—not rework of a near-match catalog part. |
| What is the MOQ for custom copper shunts? | Some factories accept 5 pcs for prototype; others need 100+ for tooling setup. |
| Lead time for prototype vs bulk? | Plan FAT dates—prototype in 2 weeks and bulk in 6 weeks is a common split. |
| Plating and insulation options? | Tin for general use; silver where contact resistance is critical; sleeve where phase clearance is tight. |
| Resistance test or inspection reports included? | OEM quality files often require FAI or batch test records on first release. |
If a supplier skips straight to price without asking about terminal detail or application, treat that as a signal—not a bargain.
| Include in Your RFQ | Example Detail |
|---|---|
| Drawing or sketch | PDF with palm width, stack thickness, hole centers—even a hand sketch with dimensions works. |
| Current (A) | Continuous and peak—e.g., 1600 A continuous / 2000 A 10 s. |
| Length / bend radius | 450 mm leg-to-leg; min 25 mm bend to clear a molded case frame. |
| Hole size & position | 2× M12 on 80 mm centers; 10 mm from palm edge. |
| Quantity & annual volume | 10 pcs prototype; 200 pcs/year if approved. |
| Application environment | Indoor switchgear, 40 °C ambient, vibration from nearby breaker operation. |
Attach photos of the installation area when you can.
Use this table to shortlist two or three copper shunt suppliers before reading the full profiles below.
| Manufacturer | Country | Custom OEM | Main Type | Best For |
|---|---|---|---|---|
| nVent ERIFLEX | UK / Global | Yes | Braided, press-welded | Catalog depth + global brand sourcing |
| Storm Power Components | USA | Yes | Laminated | U.S. custom laminated shunt fabrication |
| American Power | USA | Yes | Laminated | Drawing-first OEM repeat supply |
| Rosen Welding | China | Yes | Laminated (foil) | Resistance welding & battery interconnect programs |
| Erie Industrial Products | USA | Yes | Braided, laminated | ISO-oriented U.S. custom assemblies |
| Nu-Core | USA | Yes | Laminated, braided, cooled | Heavy industry & high-current jumpers |
| KINTO Power | China | Yes | Laminated | Export OEM for power equipment |
| Seedorff ACME | USA | Yes | Laminated | Legacy U.S. custom lamination work |
| Hubbell | USA | Limited | Braid jumpers, shunts | Utilities & distributor-backed catalog supply |
| SHZHJ | China | Yes | Flexible, braided, laminated | Factory-direct OEM / ODM wholesale programs |
Panel builders need flexible connections between fixed bus and moving parts—drawout structures, hinged doors, isolated compartments. Laminated and braided shunts absorb daily movement without stressing bolted joints.
Start with: Storm Power, Erie Industrial Products, nVent ERIFLEX, SHZHJ
Substation work often means long custom laminates, drilled palms, and repeatable bulk supply across multiple bays. Lead time and drawing fidelity matter as much as conductivity.
Start with: Nu-Core, KINTO Power, Seedorff ACME, American Power
BESS racks pack current into tight modules. Shunts must flex during thermal cycles and fit strict hole patterns on bus bars—often with plating specified for contact stability.
Start with: Rosen Welding, SHZHJ, KINTO Power
Welding guns deliver huge current in short bursts. Thin laminated foil stacks stay flexible under repeated mechanical stress— a common spec in gun and transformer rebuild programs.
Start with: Rosen Welding, Nu-Core
Charging cabinets and rail traction gear combine high current with vibration and temperature swing. Buyers often need OEM-scale production with insulation and terminal options locked early in design.
Start with: SHZHJ, nVent ERIFLEX, KINTO Power
Some projects need a part number today. Others need a factory that reads your drawing. Knowing which path you are on prevents a fast quote that fails on the shop floor.
You have standard dimensions. Distributor stock is acceptable. Approved-vendor rules favor an established electrical brand.
A utility contractor replacing grounding jumpers on a tight outage window does not need a six-week custom lamination—he needs the right braid jumper on the truck by Friday.
Typical fit: Hubbell, nVent ERIFLEX standard lines
Your print defines palm size, stack count, plating, insulation, and bend geometry. Prototype approval gates bulk release. MOQ and FAI records belong in the quality file.
A switchgear OEM launching a new frame size usually cannot force a catalog shunt into a non-standard bus gap—the connection is designed around the panel, not the other way around.
Typical fit: Storm Power, Erie Industrial Products, Rosen Welding, SHZHJ
Geography is not quality—but it shapes lead time, freight, and communication rhythm.
| Region | Strength | Example on This List |
|---|---|---|
| USA manufacturers | Shorter domestic freight, easier site visits, common for NA OEM programs | Storm Power, Nu-Core, Seedorff ACME, Erie Industrial |
| China factories | Factory-direct OEM/ODM pricing, flexible bulk scaling, export experience | SHZHJ, KINTO Power, Rosen Welding |
| Global brands | Catalog breadth, distributor access, multi-region specification history | nVent ERIFLEX, Hubbell |
Many buyers prototype domestically, then move repeat volume to a vetted overseas copper shunt factory once drawings and FAI are frozen.
Wholesale & bulk buyers: Ask about sample policy, MOQ, and whether the factory supports OEM labeling or ODM packaging. A distributor quoting 1,000 pcs/year needs different answers than a one-off MRO purchase.
A copper shunt is a flexible copper conductor that connects two bus points while allowing movement—thermal expansion, vibration, or mechanical offset—without breaking the electrical path. It is the part that bends so your rigid bus does not have to.
Braided shunts are built from woven copper wire—very flexible, common in grounding and lighter power jumps. Laminated shunts stack copper foils press-welded together—stiffer but excellent for high-current OEM bus connections with defined palm terminals.
Send a drawing with current rating, length, palm dimensions, hole pattern, plating, insulation needs, and quantity. Add a photo of the install area if space is tight—factories quote faster when they can see the clearance problem.
Prototype locally or from a nearby manufacturer when speed and physical samples matter most. Move repeat bulk to an established export factory when drawings are frozen and cost per piece drives the business case—many OEM programs run exactly this two-step path.
Custom copper shunts often start at 5–50 pcs for prototypes and rise for bulk pricing. Prototype lead times of 1–3 weeks and bulk runs of 4–8 weeks are common—always confirm against your drawing complexity and plating requirements.
Tin is widely used for general industrial contact. Silver appears where low contact resistance is critical. Nickel adds durability in certain environments. Specify plating in the RFQ—do not assume a default.
Choosing a copper shunt manufacturer comes down to fit, not fame. Some buyers need catalog breadth and distributor access; others need a factory that builds from drawings, runs prototypes, and scales to bulk OEM supply. The checklist is the same either way: confirm current rating, terminal detail, flexibility, plating, lead time, and whether in-house testing supports your quality file.
If your project sits in the second group—custom flexible copper shunts for switchgear, transformers, battery storage, EV charging, or rail equipment—shortlist suppliers that offer drawing-based production, clear MOQ, and factory-direct communication. That is where SHZHJ fits. As a Shanghai-based copper shunt manufacturer, SHZHJ produces flexible, braided, and laminated shunts for global OEM and wholesale programs, from sample builds through volume runs.
When you are ready to move from comparison to pricing, send your drawing, current rating, quantity, and application details. Visit SHZHJ at lococontact.com to request a quote and get a factory response tailored to your specification—not a generic catalog number.
*We respect your confidentiality and all information are protected.
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