Products / Heavy Copper PCB
Heavy Copper PCB
Copper up to 400 µm for high-current paths, power conversion and thermal management.
Built to carry current.
Most boards use 18 or 35 µm copper. Heavy copper boards use much thicker copper, so tracks and planes carry high currents without overheating and spread heat away from power components.
We supply copper weights from 18 µm up to 400 µm, built to IPC Class 2 or Class 3. Thick copper can replace bus bars and heavy wiring, and it lets power and control circuits share one board.
When to choose it
- Motor drives, inverters, power supplies and battery systems.
- Tracks would be impractically wide in standard copper.
- The board has to move heat away from power semiconductors.
- A single board should replace bus bars or cable links.
Key figures
| Copper weight | 18 µm – 400 µm |
| Materials | FR-4, High-Tg FR-4 |
| Surface finishes | Lead-free HASL, ENIG, hard gold fingers, selective hard gold, chemical tin |
| IPC performance class | Class 2 / Class 3 |
Design notes
- Thicker copper needs wider tracks and gaps than standard copper. Send the copper weight early so the design rules can be confirmed.
- Size tracks for the continuous current and the allowed temperature rise. IPC-2152 is the usual reference.
- Keep fine-pitch parts off the thick-copper layers where you can. Thick copper cannot be etched as finely.
What we need to quote
Your production files (Gerber and drill data) with a fabrication drawing or readme that states board thickness, surface finish and copper weights.
For heavy copper boards, state the copper weight for each layer.
For assembly on the same order, add the BOM, assembly drawing and pick-and-place file.
Have a build in mind?
Upload your Gerbers and BOM for a fast, no-obligation quote. Need an NDA first? You can ask for one on the quote form.
Certificates and documentation
ISO 9001, ISO 14001 and ISO 45001 certificates from our manufacturing partner, together with RoHS and REACH declarations, are available on request.