Current Density Calculator
Calculate current density for traces, vias, and wires
Conductor Parameters
Analysis Results
10 mil × 35 μm trace
Excessive - Risk of overheating
Current Density
225.0
A/mm²
Est. Temp Rise
42.8
°C
Cross Section
0.0089
mm²
External Layer Utilization643%
Internal Layer Utilization900%
Resistance
48.00 mΩ/in
Cross Section
18 cmil
Current Density Guidelines (IPC-2221)
| Condition | Max Density | Notes |
|---|---|---|
| External trace (10°C rise) | 30-35 A/mm² | Better cooling |
| Internal trace (10°C rise) | 20-25 A/mm² | Limited cooling |
| Via barrel | 15-20 A/mm² | Thin plating |
| Conservative design | <15 A/mm² | High reliability |
Current density affects trace heating, reliability, and electromigration. Higher densities are acceptable for short traces and pulse currents. Always verify with thermal analysis.
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