MIL-PRF-19500/437H
TEMPERATURE-POWER DERATING CURVE
Temperature-PowO-35 erating Curve
D er D
D0-35
600
500
400
300
200
100
0
25
50
75
100
125
150
175
200
DC Operation
Tl (ēC) (Leads 3/8")
TL (°C) (Leads - 3/8")
TherOalerasiiotance Junction to Leads 3/8" = 250ēC/W
DC mp Ret sn
RΘJL at 3/8" = 250°C/W
NOTES:
1. All devices are capable of operating at ≤ TJ specified on this curve. Any parallel line to this curve will intersect
the appropriate power for the desired maximum TJ allowed.
2. Derate design curve constrained by the maximum junction temperature (TJ ≤ 175°C) and power rating
specified. (See 1.3 herein.)
3. Derate design curve chosen at TJ ≤ 150°C, where the maximum temperature of electrical test is performed.
4. Derate design curve chosen at TJ ≤ 125°C, and 110°C to show power rating where most users want to limit TJ
in their application.
FIGURE 4. Temperature-power derating curve (DO-35).
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