Siemens 6RA8095-4DS22-0AA0 SINAMICS DCM D485/2000 485V DC 2000A Two-Quadrant DC Converter

The Siemens 6RA8095-4DS22-0AA0 is a SINAMICS DCM armature converter for two-quadrant DC drives, built around a single fully-controlled B6C thyristor bridge with a D485/2000 field rectifier. It takes a 400 V 3AC supply at up to 1660 A controllable and delivers 485 V DC at up to 2000 A to the motor armature, covering motoring plus regenerative braking in one direction of rotation.

Technical Specifications

Selection Notes

The B6C two-quadrant bridge is a single thyristor bridge, so it suits drives that run in one direction of rotation with motoring and regenerative braking, such as fans, pumps, and unidirectional conveyors — it needs less cabinet space than a four-quadrant unit with two anti-parallel bridges. At 2000 A output this converter covers mid-range armature currents in the D485 family; the 3000 A version in the same series steps up for larger DC motors without a different control architecture. Drives that must reverse rotation direction with full braking in both directions need the four-quadrant (B6)A(B6)C variant instead.