The Schneider Electric TeSys Deca GV2DM204BL is a reversing motor starter combination — a factory-assembled unit that pairs a GV2ME motor circuit breaker, a GV2AF3 combination block, and a 3-pole reversing contactor in one package. It is rated for AC-3 duty (squirrel-cage motor switching) and carries a thermal protection adjustment range of 0.4…0.63 A, so it is sized for small three-phase motors drawing under two-thirds of an amp at 400 V line. Control voltage is 24 V DC — a common safety-circuit and PLC-output voltage in industrial panels. The 3-pole design and Type 1 coordination mean the starter is coordinated with upstream protection so that under a short-circuit fault the starter itself may need replacement but the upstream device clears the fault without damage to the bus.
The thermal adjustment range of 0.4…0.63 A sets the motor full-load current the overload relay protects. A 0.12 kW motor at 400/415 V (50/60 Hz) or a 0.18 kW motor at the same voltage lands inside that window — confirm your motor nameplate FLA is within this band before specifying. The magnetic trip is fixed at 8 A, which clears locked-rotor conditions on motors within the thermal range. Rated breaking capacity is 50 kA at 400/415 V (Iq per IEC 60947-4-1) — that is the fault current the combination can interrupt under Type 1 coordination. If your panel's prospective short-circuit current at the starter terminals exceeds 50 kA, you need upstream current-limiting protection or a higher-rated device.
The GV2DM204BL occupies a 90 mm wide footprint on the DIN rail, with a depth of 99.6 mm and height of 176.4 mm. That 90 mm width is three standard 30 mm module positions — plan your enclosure layout accordingly. The reversing contactor and breaker are pre-wired internally; incoming line and outgoing motor connections land on the combination block terminals.