Hitachi IGBT Module Application Manual
6.2
Main Terminal
6.2.1 Pre-clamping and Final Clamping of Main Terminal
Pre-clamping for connecting of main terminal and main circuit line is not necessary.
6.2.2 Recommended Clamping Order of Mounting Screws
The clamping order of mounting screws for the IGBT’s main terminal is not critical.
6.2.3 Clamping Method for Mounting Screws
Table 9 lists values for the mounting screw clamping torque. Use of either a hand- or electromotive-
driver tool is recommended for such operations.
Table 9. Recommended Clamping Torque for Terminals
No.
Screw
Rated
Torque
(N-m)
1.37
1.96
2.94
7.84
Recom-
mended
Torque
(N-m)
1.18
1.67
2.45
7.35
Minimum
Torque
(N-m)
0.98
1.47
1.96
5.20
Remarks
1
2
3
4
M4
M5
M6
M8
for auxiliary terminal
6.2.4 Recommended Screw Length
length is such that "d" dimension extends one to two millimeters below the nut.
Figure 57. Cross-sectional View of Screw Hole
bar and other items.
Table 10. Size for Screw Hole
Screw
M4
M5
M6
M8
a
(in mm.)
3.2
4.0
5.0
6.0
b
(in mm.)
7.0
8.5
10.0
10.0
c
(in mm.)
0.8
1.2
1.2
1.2
Remarks
for auxiliary terminal
52