55 mm Thyristor/Thyristor Module with 1800 V in pressure contact technology Thyristor/Thyristor 55 mm Power Start 1800 V, 1900 A module for soft start applications in pressure contact technology. Main benefit of the design concept in comparison to existing soft starter solutions is one slim foot-print (55 mm) fitting 1900 A starting current which allows contactor compatible designs (LxWxH 134x55x100 mm). This Infineon® Power Start module is also available with 1600 V .