MIL-PRF-19500/429N
A-Pkg MELF/Axial Thermal Resistance vs FR4 Pad Area
Still Air, PCB Horizontal
1000
100
1oz Foil
2oz Foil
3oz Foil
10
0.001
0.01
0.1
1
10
100
Pad Area (in2)
FIGURE 9. Thermal resistance versus pad area (for each pad) with 1, 2, and 3 ounce copper for 1N5615-
1N5623.
23
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