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| 型号： | MJE18002D2 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 功率晶体管 |
| 英文描述： | POWER TRANSISTORS 2 AMPERES 1000 VOLTS 50 WATTS |
| 中文描述： | 2 A, 450 V, NPN, Si, POWER TRANSISTOR, TO-220AB |
| 文件页数： | 8/10页 |
| 文件大小： | 254K |
| 代理商： | MJE18002D2 |
8
Motorola Bipolar Power Transistor Device Data
MOUNTED
FULLY ISOLATED
PACKAGE
LEADS
HEATSINK
0.110
″
MIN
Figure 22a. Screw or Clip Mounting Position
for Isolation Test Number 1
* Measurement made between leads and heatsink with all leads shorted together
CLIP
MOUNTED
FULLY ISOLATED
PACKAGE
LEADS
HEATSINK
CLIP
0.107
″
MIN
MOUNTED
FULLY ISOLATED
PACKAGE
LEADS
HEATSINK
0.107
″
MIN
Figure 22b. Clip Mounting Position
for Isolation Test Number 2
Figure 22c. Screw Mounting Position
for Isolation Test Number 3
TEST CONDITIONS FOR ISOLATION TESTS*
4–40 SCREW
PLAIN WASHER
HEATSINK
COMPRESSION WASHER
NUT
CLIP
HEATSINK
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 compression washer helps to maintain a con-
stant 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 pack-
age. However, in order to positively ensure the package integrity of the fully isolated device, Motorola does not recommend exceeding 10
in
.
lbs of mounting torque under any mounting conditions.
Figure 23a. Screw–Mounted
Figure 23b. Clip–Mounted
MOUNTING INFORMATION**
Figure 23. Typical Mounting Techniques
for Isolated Package
**For more information about mounting power semiconductors see Application Note AN1040.
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