C11000 vs C10100 vs C10200 vs C12200
C11000 (ETP – Electrolytic Tough Pitch)
C11000 copper busbar is the most widely used copper grade for electrical applications. It contains 99.9% copper with a small amount of oxygen (200-400 ppm). This oxygen actually improves electrical conductivity and workability.
Conductivity: 100% IACS (International Annealed Copper Standard)
Best for: General electrical applications – switchgear, panel boards, grounding
Key advantage: Lowest cost, readily available
Limitation: Cannot be welded or used in hydrogen atmosphere
See detailed specifications on our C11000 copper busbar product page.
C10200 (OF – Oxygen-Free)
C10200 copper busbar is a high-purity oxygen-free grade with 99.95% copper and maximum oxygen content of only 10 ppm (parts per million). It sits between C11000 and C10100 in both purity and price.
Conductivity: 100% IACS
Best for: Applications requiring oxygen-free copper on a budget
Key advantage: Same conductivity as C11000, no hydrogen embrittlement, lower cost than C10100
Limitation: Not suitable for ultra-high vacuum (below 10⁻⁵ torr)
Learn more on our C10200 copper busbar product page.
C10100 (OFE – Oxygen-Free Electronic)
C10100 oxygen-free copper busbar is the highest purity copper commercially available. It contains 99.99% copper with oxygen content below 5 ppm. This grade is manufactured under strictly controlled atmosphere.
Conductivity: 100% IACS (actually 101% IACS typical)
Best for: Extreme environments – high vacuum, cryogenic, hydrogen brazing
Key advantage: Lowest outgassing, best ductility at cryogenic temperatures
Limitation: Most expensive grade (30-50% premium over C11000)
See full specifications on our C10100 oxygen-free copper busbar product page.
C12200 (DHP – Deoxidized High Phosphorus)
C12200 copper busbar contains a small amount of phosphorus (0.015-0.040%) added during melting to remove oxygen. This creates a phosphorus-deoxidized copper with fundamentally different behavior during welding.
Conductivity: 85-95% IACS (lower due to phosphorus)
Best for: Applications requiring welding or brazing of busbars
Key advantage: Excellent weldability, no hydrogen embrittlement
Limitation: Lower conductivity than C11000, slightly higher cost
Check detailed specs on our C12200 copper busbar product page.
C11000 vs C10100 vs C10200 vs C12200 – Detailed Comparison Table
| Property | C11000 (ETP) | C10200 (OF) | C10100 (OFE) | C12200 (DHP) |
|---|---|---|---|---|
| Purity | ≥99.90% | ≥99.95% | ≥99.99% | ≥99.90% |
| Oxygen content | 200-400 ppm | ≤10 ppm | ≤5 ppm | ≤0.01% (essentially none) |
| Key alloy addition | None (oxygen present) | None | None | 0.015-0.040% phosphorus |
| Conductivity (% IACS) | 100% | 100% | 100-101% | 85-95% |
| Weldability | Poor (cracks) | Good | Excellent | Excellent |
| Brazing / soldering | Fair | Good | Excellent | Excellent |
| Hydrogen embrittlement risk | High | Very low | None | None |
| Outgassing in vacuum | Moderate | Low | Very low | Low |
| Bendability | Excellent | Excellent | Excellent | Good (requires larger radius) |
| Relative price | Baseline | +15-25% | +30-50% | +5-15% |
| Stock availability | Widely available | Limited | Very limited | Limited |
The single most important difference among these four grades is oxygen content. Oxygen determines whether your copper busbar will crack when welded or exposed to hydrogen.
When to Use C11000 Copper Busbar? (90% of Applications)
C11000 copper busbar is the right choice for the vast majority of electrical applications. If your connections are bolted (not welded) and you are not working in a hydrogen atmosphere, C11000 will perform perfectly at the lowest cost.
Typical C11000 Applications
| Application | Why C11000 Works |
|---|---|
| Switchgear and panel boards | All connections are bolted or screwed – no welding |
| Motor control centers (MCCs) | Standard electrical environment |
| Distribution boxes | Indoor, normal atmosphere |
| Grounding systems | No special requirements |
| Solar combiner boxes | Bolted connections only |
| UPS and power supplies | Standard electrical performance |
How Many Amps Can C11000 Copper Busbar Carry?
C11000 copper busbar ampacity depends on cross-section, ambient temperature, and ventilation. Here are typical values for bare flat busbars at 35°C ambient, 65°C max operating temperature:
| Width (mm) | Thickness (mm) | Cross-section (mm²) | Current (Amps) |
|---|---|---|---|
| 20 | 3 | 60 | 180 A |
| 20 | 5 | 100 | 250 A |
| 25 | 5 | 125 | 300 A |
| 30 | 5 | 150 | 370 A |
| 40 | 5 | 200 | 460 A |
| 50 | 5 | 250 | 550 A |
| 50 | 6 | 300 | 620 A |
| 60 | 10 | 600 | 1050 A |
| 80 | 10 | 800 | 1350 A |
| 100 | 10 | 1000 | 1600 A |
For ambient temperatures above 35°C, multiply by 0.88 at 45°C or 0.76 at 55°C. For DC applications, add 5-8%. For busbars in enclosed panels with poor ventilation, reduce by 10-15%.
When to Use C12200 Copper Busbar? (Welding & Brazing Applications)
C12200 copper busbar is the correct choice when your busbar will be welded, brazed, or exposed to hydrogen atmosphere. The phosphorus added during refining removes oxygen completely, eliminating the cracking problem.
Typical C12200 Applications
| Application | Why C12200 Is Required |
|---|---|
| Welded busbar connections | TIG or MIG welding – C11000 cracks, C12200 welds clean |
| Brazed assemblies | Silver brazing flows better on deoxidized copper |
| Hydrogen-cooled generators | C11000 would suffer hydrogen embrittlement |
| Chemical plants with hydrogen atmosphere | No reaction with hydrogen |
| Busbars heated in reducing gas furnaces | No steam formation inside copper |
Is C12200 Conductive Enough for Busbar Applications?
Yes, for most applications. C12200 has 85-95% IACS conductivity – about 10-15% lower than C11000.
What does this mean in practice?
A C11000 busbar sized 50mm x 6mm carries 620 Amps
A C12200 busbar of the same size carries approximately 530-560 Amps
To match C11000 ampacity with C12200, increase cross-section by 5-10% or go up one size. For most applications, this is a trivial adjustment.
Can C12200 Be Welded?
Yes. C12200 welds excellently using TIG (GTAW) with ERCu or ERCu-A filler rod. Use DC straight polarity, 150-250 amps depending on thickness. No preheat is required for thickness under 10mm. Clean the weld area with a stainless steel brush before welding.
Unlike C11000 which often cracks at the weld zone, C12200 produces clean, strong welds that withstand vibration and thermal cycling.
When to Use C10200 or C10100? (Oxygen-Free Environments)
C10200 and C10100 are oxygen-free copper grades. They contain no oxygen (or virtually none), so they do not suffer from hydrogen embrittlement. However, they are more expensive than C11000.
C10200 vs C10100 – Which One Do You Need?
| Requirement | Recommended Grade | Why |
|---|---|---|
| Oxygen-free copper required, budget is tight | C10200 | 15-25% premium vs C11000, sufficient for most oxygen-free needs |
| High vacuum (below 10⁻⁵ torr) | C10100 | Lowest outgassing (≤5 ppm oxygen) |
| Extreme cryogenic (down to 4K / -269°C) | C10100 | Best low-temperature ductility |
| Hydrogen brazing of busbar connections | C10200 or C10100 | Either works – C10200 saves money |
| Customer spec says "oxygen-free" but not "OFE" | C10200 | Meets OF requirement at lower cost |
C10200 vs C11000 vs C10100 – Price Comparison
| Grade | Relative Price | Typical Premium vs C11000 |
|---|---|---|
| C11000 (ETP) | 1.0x (baseline) | – |
| C10200 (OF) | 1.15 - 1.25x | +15-25% |
| C10100 (OFE) | 1.30 - 1.50x | +30-50% |
Cost example (50mm x 6mm x 2000mm busbar, 500 pieces):
| Grade | Approximate Price per Piece | Premium vs C11000 |
|---|---|---|
| C11000 | $12.00 | – |
| C10200 | $14.00 - $15.00 | +$2.00 - $3.00 |
| C10100 | $16.00 - $18.00 | +$4.00 - $6.00 |
If your application requires oxygen-free copper, C10200 saves you 10-20% compared to C10100 with no practical difference for most applications.
How We Ensure Your Copper Busbar Meets Specifications
| Test | Equipment | Standard | Frequency |
|---|---|---|---|
| Conductivity | Eddy current sigmascope | ≥100% IACS for C11000/C10200/C10100; 85-95% for C12200 | Every batch |
| Dimensions | CMM (Coordinate Measuring Machine) / digital calipers | ±0.1mm (width/thickness), ±0.5mm (cut length) | 100% inspection |
| Hardness | Rockwell hardness tester | HV 60-85 (half-hard temper) | Every batch |
| Surface finish | Visual inspection | No scratches, pits, or burrs | 100% |
| Plating thickness | XRF analyzer | Tin: 3-8 microns; Silver: 5-15 microns | Every batch |
| Salt spray corrosion | ASTM B117 chamber | ≥96 hours no red rust (tinned busbar) | Weekly |
| Bend angle accuracy | Digital protractor | ±1° | 100% for bent busbars |
Our Copper Busbar Manufacturing Capabilities
Our factory is equipped with CNC machining centers and automated production lines to deliver consistent quality copper busbars at competitive prices.
| Equipment | Brand / Model | Capability |
|---|---|---|
| CNC shearing machine | Domestic high-precision | Thickness up to 30mm, width up to 250mm, tolerance ±0.5mm |
| CNC punching press | AMADA | Hole tolerance ±0.1mm, thickness ≤10mm |
| CNC press brake | ACCURL | Bending length up to 3000mm, ±1° tolerance, up to 6 bends per piece |
| Automatic plating line | In-house designed | Tin / silver / nickel plating, up to 4000mm length |
| Heat shrink tunnel | Custom | Busbars up to 200mm width, multiple color options |
| CMM inspection | Hexagon | Full dimensional verification |
Custom Fabrication Capabilities
| Service | Tolerance | Maximum |
|---|---|---|
| Cut to length | ±0.5 mm | Up to 6000 mm |
| Round hole punching | ±0.1 mm | Diameter 4-20 mm, thickness ≤10 mm |
| Slotted hole punching | ±0.15 mm | 6x12 mm up to 10x25 mm |
| Bending (L, Z, U shapes) | ±1° | Max 6 bends, thickness ≤15 mm |
| Tin/silver/nickel plating | ±1 micron | Up to 4000 mm length |
For custom L-shape, Z-shape, or U-shape busbars, see our custom shape copper busbar page.
How We Package Copper Busbars for Safe Delivery
| Layer | Material | Purpose |
|---|---|---|
| Inner wrap | VCI (Vapor Corrosion Inhibitor) film | Prevents oxidation during long-term storage and shipping |
| Interleaving | Kraft paper + foam sheet | Prevents scratching between stacked busbars |
| Bundling | Steel straps + edge protectors | Secures bundles together, prevents shifting |
| Pallet | Heat-treated plywood (IPPC certified) | Base for sea freight – compliant with international shipping standards |
| Outer protection | Corner protectors + heavy-duty stretch wrap | Prevents pallet damage during handling |
Shipping Methods Comparison
| Shipping Method | Delivery Time | Cost | Best For |
|---|---|---|---|
| Sea freight (LCL) | 30-40 days | Low | Orders > 500 kg, not urgent |
| Sea freight (20FT FCL) | 25-35 days | Lowest per kg | Orders > 18 tons (full container) |
| Air freight | 5-7 days | 3-5x sea freight | Urgent orders, 100-500 kg |
| Express courier (DHL/FedEx/UPS) | 3-5 days | 5-8x sea freight | Samples only, orders under 100 kg |
FAQ
Q1: How many amps can C11000 copper busbar carry?
A C11000 copper busbar carries between 180 Amps and 1600 Amps depending on its size. For a 50mm x 6mm bar at 35°C ambient, it carries 620 Amps. For a 100mm x 10mm bar, it carries 1600 Amps. Multiply by 0.88 for 45°C ambient or 0.76 for 55°C ambient. For DC applications, add 5-8%.
Q2: What is the difference between C11000 and C10100 copper busbar?
The main difference is oxygen content – C11000 contains 200-400 ppm oxygen, while C10100 contains less than 5 ppm oxygen. Both have 100% IACS conductivity. C10100 costs 30-50% more and is required for high vacuum applications, extreme cryogenic temperatures, and hydrogen brazing. For standard electrical panels, C11000 is sufficient and much more economical.
Q3: Can C12200 copper busbar be welded?
Yes, C12200 welds excellently using TIG welding with ERCu filler rod. Unlike C11000 which often cracks at the weld zone due to oxygen content, C12200 contains no oxygen (phosphorus deoxidized) and produces clean, strong welds. No preheat is required for thickness under 10mm. This is the primary reason to choose C12200 over C11000.
Q4: What is the minimum bend radius for copper busbar?
For C11000 copper busbar, the minimum inside bend radius is 2x thickness for bars 6mm and thinner, and 2.5-3x thickness for thicker bars. For a 6mm thick busbar, the minimum bend radius is 12mm (2x). For a 10mm thick bar, it is 25mm (2.5x). C10100 requires slightly larger radii (about 25-50% more). Bending across the width is standard; never bend across the thickness.
Q5: Do you provide samples of copper busbar?
Yes, we provide samples for all copper busbar grades. Standard size samples are free – you only pay shipping. Custom size samples cost $50-$200 depending on complexity, and this fee is fully refundable upon a production order of 500+ pieces. Sample lead time is 5-10 business days.
Q6: What is the MOQ (Minimum Order Quantity) for copper busbar?
For standard sizes, the MOQ is 10 pieces per size. For custom sizes, the MOQ is 50 pieces per size. For sample orders of any size or shape, there is no MOQ – we support small-batch prototype orders before mass production. For complex custom shapes requiring new tooling, the MOQ may be 100 pieces.
Q7: Can copper busbar be tin-plated?
Yes, we offer tin plating for all copper busbar grades. Tin plating thickness is 3-8 microns. It provides excellent corrosion resistance for indoor switchgear and panel boards. Silver plating (5-15 microns) is also available for low contact resistance applications. If you plan to weld or braze the busbar, order bare – plating must be removed before welding.
Q8: How much more expensive is C10200 than C11000?
C10200 copper busbar costs 15-25% more than C11000. For a 50mm x 6mm x 2000mm busbar, C11000 costs approximately $12 per piece, while C10200 costs $14-$15 per piece. C10100 costs 30-50% more ($16-$18 per piece for the same size). If your application requires oxygen-free copper but not extreme vacuum, C10200 is the best value.
Q9: Which copper busbar grade is best for grounding?
C11000 is the most commonly used and most cost-effective copper busbar for grounding applications. Its 100% IACS conductivity provides a low-impedance path to ground. For outdoor or coastal environments with corrosion risk, we recommend tin-plated C11000. C12200 and C10200 also work but cost more – only specify them if you also need welding capability or oxygen-free properties.
Q10: What is the MOQ for custom shape copper busbars (L-shape, Z-shape, U-shape)?
For simple custom shapes like L-shape, Z-shape, and U-shape with standard bend radii, the MOQ is 50 pieces per size. For complex shapes with 3+ bends or custom tooling requirements, the MOQ is 100 pieces. Sample orders of 1-10 pieces are accepted with a sample fee ($50-$200) that is refundable on production orders.
