Motor starting duty and protection profile
The 3RK4340-3LR51-0BA0: Short-circuit protection is handled by upstream circuit breakers, not integrated fuses. The unit is rated for up to 80 operating cycles per hour, which suits intermittent-duty conveyors, pumps, and fans rather than high-speed indexing applications.
Control voltage and I/O requirements
Control supply is 20.4–26.4 V DC — a standard 24 V DC panel rail is fine as long as it stays within that window under load. The starter has no digital inputs onboard (0 digital inputs), so all I/O control is handled externally via the I/O-controlled interface designation. No PROFIBUS DP, PROFINET, or AS-Interface protocol support is built in. Communication is handled through the I/O-controlled interface; the unit itself is a non-bus device. Brake control outputs for DC or AC brake coils are not included — this is a motor-start-only variant.
Physical integration and mounting constraints
Dimensions are 145 mm deep, 182 mm wide, 220 mm high — this is a compact footprint for a direct starter with integrated overload. The IP55 enclosure rating means the housing is dust-protected and water-jet resistant, suitable for installation in washdown zones or dusty panel environments without a secondary enclosure. This flexibility helps when the starter must fit into a crowded backplate or align with cable entry points, but the tilt limits should be respected to keep the bimetal trip calibration within spec.
Lifecycle and compliance documentation
No UL or CSA listing is explicitly stated in the available records, but the part carries the Siemens SIRIUS brand designation which typically includes CE and UKCA marking for European markets. The IEC 81346-2 reference code Q confirms its function as a motor starter in the equipment hierarchy.