Laminated Busbar FAQ

SHANYUAN builds laminated busbars from 1 to 6+ layers. Layer count is driven by circuit topology (DC+, DC-, AC phases, sense lines) and by current per layer. See the specifications page for the standard stack options.

Capacity depends on cross-section, layers and temperature rise. Our reference basis is a 30 °C rise at rated current; a 30 x 5 mm single copper bar carries roughly 450 A under that basis. Use the ampacity calculator to estimate your size.

Copper (C11000) gives lower resistance and better thermal performance; aluminum (6101) weighs less and costs less but needs about 40% more cross-section for the same resistance, and bolted joints need different torque control. The copper vs aluminum comparison in our resources explains the trade-offs.

PET film for standard insulation up to moderate voltages, Nomex for higher thermal class, and DLF (dielectric film) constructions for high-voltage or PD-critical applications. Material choice follows voltage class, temperature and any UL 94 V-0 requirement.

M6 and M8 threaded studs, blade terminals and welded tabs are the standard families, with solder and press-fit options on request. Terminal layout is defined in the drawing; the DFM review validates spacing and plating coverage.

Yes. Tin plating (typically 5-15 µm) is standard on connection areas for corrosion resistance and stable contact resistance. Silver plating is available for high-current interfaces where contact resistance matters most.

Hipot (dielectric withstand), insulation resistance, dimensional and continuity checks per lot. PD testing is available where the voltage class and application require it. Every lot ships with test records; CoC is provided on request.

CoC is available on request with each shipment. PPAP-style documentation (IMDS, control plans, capability studies) can be scoped in the quotation for automotive programmes. Test specifications follow the agreement at design freeze.

Custom laminated busbar projects typically start from a few hundred pieces per year once tooling is amortized. Low-volume and prototype needs are covered by sample builds before production tooling.

Tooling and samples: 2-4 weeks after drawing approval. Production for repeat orders: 2-5 weeks depending on volume, plating and layers. Exact dates are in the quotation.

Busbars are individually protected and boxed or palletized depending on size, with edge protection on plated surfaces. Export documents include the commercial invoice, packing list and, on request, CoC.

Laminated busbars are typically classified under HS 8536.90 (electrical apparatus) or 8544.90 (insulated conductors) depending on construction. We state the code used on our export invoices; confirm classification with your broker for your market.

T/T is standard; L/C is accepted for larger orders. Payment terms are agreed per order and stated in the quotation. We do not process payments through this website.

Yes. Laminated busbars for 800 V EV platforms and 1000-1500 V DC systems are a core product family, with dielectric and creepage design per the voltage class. See the battery busbar and power electronics pages for the standard families.