The Siemens 3RW3017-1BB04 is a SIRIUS soft starter in size S00, rated 12.5 A at 40 °C, derating to 12 A at 50 °C and 11 A at 60 °C. That 12.5 A figure is the continuous motor current it can ramp up without the thermal stress of a direct-on-line start — sized for a motor drawing roughly 5.5 to 7.5 kW at 400 V three-phase, depending on the load duty cycle. An integrated bypass contactor is built in, meaning once the motor reaches full speed the thyristors are shorted out. That eliminates SCR heat dissipation during run, so the enclosure doesn't need extra ventilation for continuous duty. The downside: no external reset input, so a fault trip requires a manual power cycle or a remote contactor ahead of it. Mounting is screw or snap-on onto a DIN rail, with 45 mm width and 95 mm height. Clearance requirements: 60 mm above, 40 mm below, 15 mm to the side. That's tighter than many soft starters in this class — useful for a crowded panel where every millimeter counts.
This is a motor-starting component for a control panel, not a standalone drive. It ramps voltage to an induction motor over a set period, limiting inrush current. The operating temperature range of -25 to +60 °C covers most plant-floor conditions, but derating starts at 40 °C, so a hot cabinet near a furnace or oven needs the 50 °C or 60 °C current column. Main circuit connections are screw-type terminals; auxiliary and control circuits also use screw terminals. Solid wire range is 2x 0.25 to 2.5 mm². No inside-delta circuit configuration, so it's a standard in-line soft starter, not a six-wire delta-connected unit.