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MIL-PRF-19500-406 Semiconductor Devices, Diode, Silicon, Voltage Regulator, Types 1N4460, 1N4460C, 1N4460D Through 1N4496, 1N4496C, 1N4496D, And 1N6485, 1N6485C, 1N6485D Through 1N6491, 1N6491C, 1N6491D, 1N4460Us, 1N4460Cus, 1N4460Dus Through 1N4496Us, 1N4496Cus, 1N4496Dus, And 1N6485Us, 1N6485Cus, 1N6485Dus Through 1N6491Us, 1N6491Cus, 1N6491Dus, 1N4460Um Through 1N4496Um, Plus C And D ...This specification covers the performance requirements for micro-miniature 1.5 watt silicon, low leakage, voltage regulator diodes with tolerances of 5 percent, 2 percent, and 1 percent. Four levels of product assurance are provided for each encapsulated device type as specified in MIL–PRF–19500.

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MIL-PRF-19500/406L
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)
NOTE:
1. See figure 13 for UM package.
FIGURE 15. Thermal resistance versus FR4 pad area still air, PCB horizontal (for each pad) with
1 oz copper (top curve), 2 oz copper (middle curve), and 3 oz copper (bottom curve).
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