62 A at 40 °C — what it means for the motor branch
The 3RW4423-3BC44: That 62 A figure is the continuous current in the bypass-closed state — the integrated bypass contactor carries the load after start, so the thyristor stack only sees starting current. For a 30 kW motor at 230 V (roughly 85 A FLA), this unit is undersized; it fits motors up to about 22 kW at 230 V where FLA lands near 60 A. The adjustable current limitation lets you cap starting current between 100% and about 400% of the motor FLA — useful for soft-starting conveyors or pumps that can't take a full-voltage jolt. Minimum load is 8%, so lightly loaded machines still get controlled acceleration without the unit dropping out.
Panel fit and wiring — what the dimensions and terminals tell you
At 270 mm deep, 170 mm wide, and 192 mm tall, this soft starter needs a back-panel clearance of 100 mm above and 75 mm below for airflow — the thyristor heat sink dumps about 30 W at rated current, so don't box it in. Side clearance is only 5 mm, so you can pack units tight horizontally. Screw fixing means four M5 bolts into the backplate — no DIN-rail clip. Main circuit uses box terminals accepting stranded 2x (4...50 mm²) — that's up to 1/0 AWG. The mounting position allows vertical surface with ±90° rotation and ±22.5° tilt front-to-back, so you can orient it for cable entry without fighting the gland plate.
Lifecycle and sourcing — still an active catalog line
No stock-holding claim here; sourced per RFQ from authorized industrial distribution.
Protection and diagnostics — what's built in
Motor overload protection is integrated — no separate thermal relay or electronic overload in the branch. The unit also has intrinsic device protection that monitors thyristor junction temperature and over-current, so a stalled rotor or phase imbalance won't take out the power stack. A display shows fault codes — no programmer needed to read the last trip cause. External reset input lets you clear faults remotely from a PLC or a pushbutton on the panel door, which saves a trip to the cabinet on a nuisance trip.