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When your project demands a conductor that won't let you down — whether you're shielding sensitive electronics, lining a heat spreader, or cutting custom gaskets — finding a copper sheet with consistent thickness and reliable dimensions is half the battle. This copper sheet 0.3mm foil plate is sized for makers, engineers, and repair technicians who need a workable, solderable copper surface without ordering industrial minimums.
Each piece is cut from C110 electrolytic tough-pitch (ETP) copper, delivering ≥99.9% copper purity. The sheet measures 305mm (≈12 in) wide and is available in lengths from 100mm to 1000mm (≈3.9–39.4 in) at a uniform 0.3mm (≈0.012 in) thickness. Surface finish is mill-bright with a smooth, burr-minimized edge on cut sides.
Typical use cases include RF/EMI shielding panels in enclosures, thermal interface layers between heat sinks and components, decorative inlay work in woodworking and jewelry, and replacement bus-bar strips in battery packs or solar installations. The 305mm standard width fits directly into common sheet-metal brakes and laser-cutter beds, making it a go-to copper foil plate for prototyping workflows.
Thickness held to ±0.02mm tolerance across the full 305mm width, ensuring predictable bend radii and uniform electrical resistance per unit length.
C110 ETP copper achieves ≥100% IACS conductivity rating, making it the standard choice for bus bars, grounding straps, and EMI shielding applications.
Thermal conductivity of approximately 385–400 W/(m·K) allows this foil to act as an effective heat spreader between components and heat sinks.
Available in 100, 150, 200, 250, 300, 400, 500, and 1000mm lengths — order exactly what your project requires without paying for excess material.
Soft-annealed temper allows hand-bending to tight radii without cracking. Accepts standard flux-core solder and silver-bearing alloys for reliable joints.
Clean, oxide-minimized surface straight from the mill reduces prep time before soldering, plating, or bonding — no sanding required for most applications.
| Material | C110 Electrolytic Tough-Pitch (ETP) Copper, ≥99.9% Cu |
|---|---|
| Thickness | 0.3mm (≈0.012 in) ±0.02mm |
| Width | 305mm (≈12.0 in) |
| Available Lengths | 100 / 150 / 200 / 250 / 300 / 400 / 500 / 1000mm |
| Temper | Soft-annealed (H00) |
| Surface Finish | Mill-bright, burr-minimized cut edges |
| Electrical Conductivity | ≥100% IACS |
| Thermal Conductivity | ~385–400 W/(m·K) |
| Tensile Strength | Typically 220–260 MPa (soft temper) |
| Packing Qty | See variant options |
| Product Type | Copper Sheet / Metal Foil Plate |
Measure the longest dimension of your target area and add 5–10mm for trimming allowance. For continuous runs (e.g., bus bars or shielding panels), the 500mm or 1000mm option minimizes seam joints. For small patches or gaskets, the 100–200mm lengths reduce waste.
At 0.3mm, this foil is designed for electrical, thermal, and decorative applications rather than load-bearing structures. Soft-annealed C110 copper has a tensile strength of typically 220–260 MPa, which is adequate for flexible connectors and shielding but not for mechanical fastening under sustained stress.
Copper naturally oxidizes to form a patina (cupric oxide) when exposed to air and moisture. For electrical contacts, apply a thin layer of flux or contact grease after installation. For decorative use, a clear lacquer coat preserves the mill-bright finish. In dry indoor environments, visible tarnish typically develops over weeks to months.
Yes. The mill-bright surface accepts standard tin-lead (Sn63/Pb37) and lead-free (SAC305) solder alloys with rosin or no-clean flux. Lightly abrade or degrease the surface with isopropyl alcohol before soldering if the sheet has been handled, as skin oils can inhibit wetting.
At 0.3mm thickness, this foil cuts cleanly with aviation tin snips, a sharp utility knife against a steel rule, a rotary cutter, or a laser cutter. Avoid standard scissors, which can distort the edge. A sheet-metal brake or hand-bending jig works well for straight folds.
Yes. C110 ETP copper at 0.3mm provides effective attenuation for frequencies from low MHz into the GHz range when properly grounded and overlapped at seams. For enclosure lining, use conductive adhesive tape or solder the seams to maintain a continuous ground plane. Contact us to confirm suitability for your specific frequency and attenuation requirements.
Some size variants are available in a 2-piece pack (305×100mm) or as single pieces. The packing quantity is shown in the variant selector. Pricing reflects the per-pack cost, so compare the per-piece price if you need multiple lengths.
