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Products&Service
A&J Link Technology Co., Ltd. traces its roots back to Suzhou Aierjie New Material Technology Co., Ltd., which was founded in 2017. Since its establishment, it has been dedicated to the research and development, design, production and manufacturing of PP, PC insulating sheets and busbars.
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Solutions
A&J Link Technology Co., Ltd. traces its roots back to Suzhou Aierjie New Material Technology Co., Ltd., which was founded in 2017. Since its establishment, it has been dedicated to the research and development, design, production and manufacturing of PP, PC insulating sheets and busbars.
Laminated Copper Busbar
High Conductivity Power Interconnection Solutions
High-purity copper conductors with IACS 100%+ conductivity, engineered for EV traction inverters, high-frequency power supplies, and high-current industrial drives. Custom sizes, shapes, and fabrication available with fast lead time.
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Product Details
Why Choose Laminated Copper Busbars?
High-Conductivity T2 / C11000
Electrolytic tough pitch copper — low resistance, low heat, the mainstream busbar grade.
Superior Thermal Conductivity
Copper spreads heat better than aluminum, so hotspots stay cooler and insulation lasts longer.
High Mechanical Strength
A rigid, bonded structure that supports its own weight and tolerates vibration.
Full Customization
Dimensions, layer count, hole pattern, and terminal style built to your drawing.
Copper Grade & Conductivity: T2 / C11000
We build with T2 / C11000 electrolytic tough pitch copper — the mainstream grade for laminated busbars, with high conductivity and a stable supply.
What about C101? C101 is oxygen-free copper (OFE): lower oxygen content and slightly higher conductivity, used in very high-frequency, ultra-low-loss, or vacuum-brazing applications. For the large majority of busbar designs, T2 / C11000 is sufficient.
Technical Specifications
| Parameter | Specification |
|---|---|
| Conductor | High-purity copper T2 / C11000 |
| Surface Finishing | Tin / Nickel / Silver / Bare copper |
| Plating Thickness | 3–10 µm (typical, to customer spec) |
| Insulation | High-grade PET / PI film |
| Rated Voltage | Up to 1500 V DC |
| Current Capacity | Up to 1500 A (design dependent) |
| Operating Temperature | −40 °C to +150 °C |
| Inductance | < 20 nH |
| Standards | ISO 9001:2015 · RoHS · UL recognized |
Resistance and current capacity interact with section and temperature — how they behave is covered in our guide on busbar resistance.
Not sure which section or finish fits your design?
Send your current, voltage, and envelope — we'll recommend the section, plating, and layer count.
Surface Finishing: Tin, Nickel, or Bare?
Plating is chosen for the environment and the joint — not for cost alone.
| Finish | Best for | Trade-off |
|---|---|---|
| Tin (Sn) | Default: solderable, oxidation-resistant, low cost | Limited life at high temperature or wear |
| Nickel (Ni) | High temperature, wear, corrosive environments | Higher contact resistance than silver |
| Silver (Ag) | High-current joints, lowest contact resistance | Highest cost; tarnishes in sulfur |
| Bare copper | Welded joints, controlled environments | Needs protected storage |
Unsure? Choose tin. It is the default answer for roughly 90% of applications — and we'll flag it if your environment calls for something else.
Copper or Aluminum?
| Metric | Copper | Aluminum |
|---|---|---|
| Conductivity (relative) | 1× | ~0.61× |
| Section for same resistance | 1× | ~1.6× |
| Weight for same resistance | 1× | ~0.5× |
| Cost | Higher | Lower |
Space-tight, high-current, high-frequency → copper. Weight- and cost-driven with room to spare → aluminum.
Deeper comparison: copper vs aluminum cost ｜ aluminum vs copper busbar
Applications
EV Traction Inverters
Low-inductance DC links for high-current traction stages.
High-Frequency Power Supplies
Compact, low-inductance connections for switching topologies.
Industrial Drives
Rugged current paths for VFDs and servo systems.
Frequently Asked Questions
What copper grade do you use?
T2 / C11000 electrolytic tough pitch copper — the mainstream busbar grade. C101 (oxygen-free) is outside our standard range; if your design truly needs it, we'll tell you rather than substitute.
Should I choose tin-plated or bare copper?
Choose tin unless your joint is welded or you are in a controlled environment. Tin is solderable, oxidation-resistant, and the default for roughly 90% of applications.
Copper or aluminum — which should I choose?
Copper when space is tight, current is high, or switching is fast. Aluminum when weight or cost is the constraint and the envelope has room for a larger section.
Can you customize size, shape, and layers?
Yes — dimensions, layer count, hole pattern, terminal style, and plating are built to your drawing. Most parts are made to order rather than selected from a catalogue.
What is your typical lead time and MOQ?
Both depend on the design and the order quantity, so they are confirmed per project. Tell us your schedule and annual volume and we'll come back with a realistic date.
Where can I see your manufacturing and quality process?
Ask for our documentation with your inquiry — we'll share certificates, test records, and process photos directly rather than describing them here.
Related Resources
- laminated busbar — the complete guide to construction, specs, and selection
- busbar temperature performance — how heat affects current capacity and life
- laminated busbar design guide — a step-by-step selection process for engineers and procurement
- busbar selection mistakes — the errors that cost time, money, and reliability
Need a Custom Laminated Copper Busbar?
Send your drawing, current, and envelope — our engineers will review feasibility and come back with a design recommendation.
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If you are interested in our products, please contact us as soon as possible!
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