What this SIMATIC motor starter gives you
The Siemens SIMATIC 3RK1301-0JB00-0AA2 is a direct motor starter built for the pit — CLASS 10 trip curve means it clears a locked-rotor fault before the winding insulation starts cooking. Rated 50 kA at 400 V, so it handles high-fault-current installations without upstream coordination headaches. Plugs onto a terminal module, which keeps wiring changes to a screwdriver turn rather than a panel rework.
Fieldbus fit and footprint
Both PROFINET and PROFIBUS DP are onboard — no separate comm module needed, so it drops into an existing S7 line without adding another slot occupant. The 45 mm width and 265 mm height fit a standard DIN-rail envelope; depth is 120 mm, which clears most 200 mm-deep enclosures. Mounts vertical or horizontal, so you can tuck it into tight gland-plate layouts.
What the ratings mean for a panel build
CLASS 10 means the overload relay trips within 10 seconds at 600% of the set current — standard for standard-duty induction motors driving pumps, conveyors, or crushers. The 50 kA SCCR at 400 V covers most industrial distribution panels; you won't need a current-limiting feeder breaker upstream. Rated for 750 operations per hour, so it keeps up with rapid cycling on a batch line. Supply voltage is 24 V DC nominal, range 20.4 to 28.8 V, which matches common control transformers and UPS-backed supplies.
Environmental toughness
Shock rated 5 g for 11 ms — shrugs off the vibration from a nearby crusher or mill. Operating temperature 0 to 60 °C; storage and transport from -40 to +70 °C. Pollution degree 3 at 400 V, 2 at 500 V per IEC 60664 — suitable for dusty, conductive environments like a mineral processing plant.