mm²·K/W
square millimeter kelvin per watt
Areal thermal resistanceexact by definition
The square millimeter kelvin per watt is 10⁻⁶ m²·K/W, the unit used inside semiconductor packaging where the areas are die-sized. A die-attach layer at 5 mm²·K/W under a 100 mm² die contributes 0.05 K/W to the junction-to-case path.
| 1 mm²·K/W | 0.000001 RSI (m²·K/W) |
Solvers that use areal thermal resistance