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Products > Dual Well Vacuum Overclamps > Series 21

Semco VOC Series 21: An affordable solution for testing of printed circuit boards


  • Semco's VOC Series 21 Dual Well Overclamps are used for testing bare or loaded printed circuit boards that are tested on dual well test fixtures.
  • The VOC Series 21 dual overclamps have the same features as the Series 20.


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How To Determine UUT And Pan Measurements

Fixture Size
Max UUT Size
No. of Rails No. of Fingers
VOC-102-DW2   (ASM-2104)
5 18
VOC-102-DW1   (ASM-2107)
4 12
VOC-103-DW   (ASM-2106)
5 18
All dimensions in inches 






How To Determine Dimensions

First Dimension: Left To Right
Second Dimension: Front To Back
ASM-2104 VOC-102-DW2 20x16"
20 " Left to Right
16" Front to Back

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Sunday, May 26, 2024
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Kit Size

Choose a kit size based on the size of your printed circuit board to be tested.

Insert Option

Insert option text

Gas Arm / Carlson Hinge Spring Supports

The Gas Arm lid option replaces the standard Carlson spring hinges.

Riser Blocks

Riser Blocks raise the polycarbonate lid to accommodate tall components on the UUT (Unit Under Test).  Riser blocks are recommended when you have components taller than 1.2".