In late November 2018 EDB Fakel finished a long-time life test of the SPT-140 for one of European customers.
The thruster total firing operation time exceeded a record value for this class of thrusters. To a point which is recognized by experts that it is not yet the limit.
The SPT-140 thruster with the power of 4.5 kW and discharge voltage of 300 V was designed for heavy geostationary spacecraft orbit raising and station keeping.
This type of thrusters is used nowadays on the European spacecraft Eutelsat 172B, SES-12, SES-14 and American spacecraft Telstar-19 and Intelsat-38.