MIL-PRF-19500/621D
Temperature--Power dratanincucue ve
Tempr ure Power deer i tg g rv r
2N7369
140
120
100
(See note 1)
80
(See note 2)
60
(See note 3)
40
(See note 4)
20
(See note 4)
0
25
50
75
100
125
150
175
200
225
(Case)
Tsink (ēC)
DC Operation
Thermal Resistance Junction to Case = 1.5ēC/W
Note: Max Finish-Alloy Temp = 175.0ēC
NOTES:
1. Maximum theoretical derate design curve. This is the true inverse of the worst case thermal resistance
value. 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 temperatures and power rating specified.
(See paragraph 1.3)
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 2. Temperature-power derating graph.
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