617 A at 40 °C — the rating that matters for motor starting
The 3RW4446-6BC36: That 40 °C figure is the baseline for sizing — if your panel ambient runs hotter, the continuous current drops by about 12 % per 10 °C rise, so a motor pulling 500 A FLA needs the 50 °C column, not the 40 °C one. Insulation voltage is rated 690 V, operating frequency 50/60 Hz. The thyristor-based switching handles the inrush without mechanical contact wear — the soft starter ramps voltage to the motor, not slamming contacts closed.
Inside-delta wiring and main circuit connections
This unit supports inside-delta circuit configuration, which lets you wire the soft starter inside the motor delta connection — reduces the current the soft starter sees by a factor of √3 compared to in-line wiring. That means a 617 A rated unit can handle a motor with a line current up to about 1070 A when wired inside-delta, assuming the motor windings are accessible. Main circuit termination accepts stranded 70–240 mm², finely stranded 50–240 mm², or busbar connection. For North American builds, the clamping points accept 2/0–500 kcmil using both points, with the front point handling 3/0–600 kcmil and the back point 250–500 kcmil. That covers everything from a 200 A feeder to a 600 A motor circuit without adapters.
Mounting and panel fit — 298 mm deep, screw-fixed
Dimensions are 298 mm deep, 210 mm wide, 230 mm high. Mounting position allows vertical surface with ±90° rotation and ±22.5° tilt front/back, giving flexibility in tight enclosures. Clearance requirements: 100 mm upwards, 75 mm downwards, 5 mm at the sides. The 5 mm side gap is tight — adjacent devices or cable ducts need to stay clear of the heatsink fins.
Active production — sourcing reality
Sourced through independent distribution channels. No stock-holding claim — quoted to order per RFQ.