MJF18009 データシートの表示（PDF） - ON Semiconductor
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MJF18009 Datasheet PDF : 12 Pages
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MJE18009 MJF18009
TEST CONDITIONS FOR ISOLATION TESTS*
MOUNTED
CLIP FULLY ISOLATED
PACKAGE
LEADS
MOUNTED
CLIP
FULLY ISOLATED
PACKAGE
0.107″ MIN
LEADS
MOUNTED
FULLY ISOLATED
PACKAGE
0.107″ MIN
LEADS
HEATSINK
0.110″ MIN
HEATSINK
HEATSINK
Figure 22. Clip Mounting Position for
Isolation Test Number 1
Figure 23. Clip Mounting Position Figure 24. Screw Mounting Position
for Isolation Test Number 2
for Isolation Test Number 3
*Measurement made between leads and heatsink with all leads shorted together
MOUNTING INFORMATION**
4-40 SCREW
CLIP
PLAIN WASHER
HEATSINK
COMPRESSION WASHER
NUT
HEATSINK
Figure 25a. Screw–Mounted
Figure 25b. Clip–Mounted
Figure 25. Typical Mounting Techniques
for Isolated Package
Laboratory tests on a limited number of samples indicate, when using the screw and compression washer mounting
technique, a screw torque of 6 to 8 in . lbs is sufficient to provide maximum power dissipation capability. The compres-
sion washer helps to maintain a constant pressure on the package over time and during large temperature excursions.
Destructive laboratory tests show that using a hex head 4–40 screw, without washers, and applying a torque in excess
of 20 in . lbs will cause the plastic to crack around the mounting hole, resulting in a loss of isolation capability.
Additional tests on slotted 4–40 screws indicate that the screw slot fails between 15 to 20 in . lbs without adversely
affecting the package. However, in order to positively ensure the package integrity of the fully isolated device, ON Semi-
conductor does not recommend exceeding 10 in . lbs of mounting torque under any mounting conditions.
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