Please not that this type thyristors has correctly mounted when tested get the correct
result.... The
manufacturing type can both IXYS (black housing) and Semikron (white housing). Depending type and size, these can show different values when checking them up.300.
For larger types softstarters type PSTB are using thyristors capsule types. See principal
picture below.Some examples ofthyristors and its marking
Below you find the typical types thyristor blocks used PSS and PST30.
A I
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ABB Automation Products AB, Cewe-Control
S-721 Västeras, SWEDEN
Telephone +46 00
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