Imported from hyndex/Schematics-and-PCB-Skills (skills/pcb-specialized-heavy-copper/SKILL.md). Install upstream with npx skills add hyndex/Schematics-and-PCB-Skills --skill pcb-specialized-heavy-copper. Copyright stays with the author.

Heavy Copper PCB

Name: pcb-specialized-heavy-copper
Author: hyndex

≥3 oz copper for high-current paths.

Capacity (1 mm trace, 20 °C rise)

Cu weight	Current
1 oz	6 A
2 oz	10 A
3 oz	14 A
4 oz	18 A
6 oz	25 A
10 oz	35 A
20 oz	55 A

Trace / space rules

Cu	Min trace/space
1 oz	0.10 / 0.10 mm
2 oz	0.20 / 0.20 mm
3 oz	0.30 / 0.30 mm
4 oz	0.40 / 0.40 mm
6 oz	0.50 / 0.50 mm

Key rules

Mix Cu weights: 1 oz inner for fine signals + 3+ oz outer for power.
Plane balance ≤20% asymmetry → no warp.
No thermal relief on power pads.
Multiple vias (1+/A) for layer transitions.
Extended reflow profile for heat sinking.
Bigger drills for heavy copper barrels.

Source

specialized-pcb/types/18-heavy-copper.md

Checklist

{ "ocm": "1", "id": "hyndex-schematics-and-pcb-skills-pcb-specialized-heavy-copper", "kind": "skill", "name": "pcb-specialized-heavy-copper", "description": "Heavy Copper PCB design — ≥3 oz Cu, up to 20+ oz, busbar inlays. Use for high-current power distribution (motor drives, EV traction, BMS, welders, inverters). Trace / space grows with copper weight; Cu balance critical for warpage; multi-via for layer transitions; reflow profile requires extended preheat; no thermal relief on power pads.", "publisher": "hyndex", "version": "1.0.0", "capabilities": { "domains": [ "math" ], "tags": [ "skill-md", "github" ], "languages": [ "en" ] }, "quality_prior": 0.6, "examples": [ "Heavy Copper PCB design — ≥3 oz Cu, up to 20+ oz, busbar inlays. Use for high-current power distribution (motor drives, EV traction, BMS, welders, inverters). Trace / space grows with copper weight; Cu balance critical for warpage; multi-via for layer transitions; reflow profile requires extended preheat; no thermal relief on power pads." ], "primary": false, "metadata": { "source": { "provider": "github", "repository": "https://github.com/hyndex/Schematics-and-PCB-Skills", "path": "skills/pcb-specialized-heavy-copper/SKILL.md", "ref": "28baafbb40154d14824c12a2f69bc9e3dee15a42", "url": "https://github.com/hyndex/Schematics-and-PCB-Skills/blob/28baafbb40154d14824c12a2f69bc9e3dee15a42/skills/pcb-specialized-heavy-copper/SKILL.md", "key": "hyndex/Schematics-and-PCB-Skills/skills/pcb-specialized-heavy-copper/SKILL.md" } }, "instructions": "# Heavy Copper PCB\n\n≥3 oz copper for high-current paths.\n\n## Capacity (1 mm trace, 20 °C rise)\n\n| Cu weight | Current |\n|---|---|\n| 1 oz | 6 A |\n| 2 oz | 10 A |\n| 3 oz | 14 A |\n| 4 oz | 18 A |\n| 6 oz | 25 A |\n| 10 oz | 35 A |\n| 20 oz | 55 A |\n\n## Trace / space rules\n\n| Cu | Min trace/space |\n|---|---|\n| 1 oz | 0.10 / 0.10 mm |\n| 2 oz | 0.20 / 0.20 mm |\n| 3 oz | 0.30 / 0.30 mm |\n| 4 oz | 0.40 / 0.40 mm |\n| 6 oz | 0.50 / 0.50 mm |\n\n## Key rules\n\n- **Mix Cu weights**: 1 oz inner for fine signals + 3+ oz outer for power.\n- **Plane balance** ≤20% asymmetry → no warp.\n- **No thermal relief** on powe", "cost": { "context_tokens": 263 } }

pcb-specialized-heavy-copper

About

Heavy Copper PCB

Capacity (1 mm trace, 20 °C rise)

Trace / space rules

Key rules

Source

Checklist

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Manifest

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