PCB, -Hole, -Grid, sheet thickness - BIZON-WICON connecting technique

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                     BIZON contacts:

- many suitable materials with any sheet thicknesses.
- preferably square cross-section.
- can be adapted to existing hole diameters.
- allow a small pitch. Good for miniaturization.
- higher dielectric strength. Due to the system small holes result in a larger hole spacing.
 Important for 48 volts and higher.

Dimensions for  BIZON contact sizes and PCB holes

Sheet thickness

Finished hole - LP
min - max
smallest    stamping pitch
mm          1)
0,20,2 x 0,240,3 - 0,380,81
0,40,4 x 0,50,55 - 0,651,2
0,51 x 0,62
0,8 - 0,9
0,60,6 x 0,60,8 - 0,91,2
0,640,64 x 0,640,9 - 1,01,3
0,63 adapted   2)0,64 x ,081,0 - 1,11,45
0,8 0,8 x 0,81,05 - 1,151,6
0,8 adapted    2)
0,8 x 1,21,40 - 1,552,0
1,21,2 x 1,21,52 - 1,672,4
1,2 adapted    2)
1,2 x 1,51,9 - 2,052,7
1,51,5 x 1,51,9 - 2,053,0
2,0 x 2,0
1) The hole pattern of the PCB is usually larger.
Contacts with a tip require a larger pitch in production.
2) The contact is adapted to historically standard, larger hole diameters.
The maximum and minimum dimensions of the finished hole must be agreed with the contact manufacturer. A tolerance of 0.15 mm is possible as from hole diameter 1 mm.
BIZON contacts have the greatest force in the center of the contact. Therefore, the contact should be pressed in up to the center of the PCB +0.2 mm. Because there it is most stable.

Thinner PCBs, e.g. 1 mm or 0.8 mm, can also be used for these reasons.

In thicker boards, 2.4 mm or thicker, the Middle of the press-fit zone should be at least 0.8 mm away from the lower or upper surface.
The offset tolerance increases accordingly.
Rest ring width
In addition to the electrical connection, the rest ring should also mechanically secure the sleeve against displacement. Like a rivet head, so to say.
Historically, there were press-fit contacts that generated very high displacement forces, so a wider rest ring was often of no help. So it depends very much on the contact properties how much "rest ring" you need. This can also be seen from the various manufacturers' catalog specifications.
The BIZON contact with its 4 contact radii generates very low shear forces on the entire sleeve, which are not simultaneously secured by the maximum compressive force.
For the BIZON contact, therefore, the smallest restring width required for the electrical connection is sufficient.
The IEC 352-5 standard specifies 0.15 mm.
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