The Siemens 3RB1016-2SB0 is a solid-state overload relay in the SIRIUS 3RB family, sized for direct mounting onto a contactor in the Size S00 footprint. The adjustable current range is 3.0 to 12 A, covering small to medium motor loads in 400 VAC three-phase systems. The screw-type connection terminals are standard for panel wiring, and the manual-automatic reset selector lets you choose between manual reset after a trip (for attended lines) or automatic reset (for remote or unattended installations).
Integration notes
Mounts directly onto a Size S00 contactor (e.g., Siemens 3RT201 or 3RT202 series) without additional wiring between the relay and the contactor coil — the overload relay's bimetal strip or solid-state sensor is in series with the motor circuit, and its N/C contact breaks the contactor coil on trip. The screw terminals accept 0.5 to 4 mm² wire, and the unit snaps onto the contactor's mounting rail without tools. The Class 20 curve is the default for general-purpose motor starting; if your application requires faster tripping (e.g., for submersible pumps or high-inertia loads), verify that the motor's locked-rotor time-to-trip aligns with the Class 20 characteristic. The manual-automatic reset selector is on the front face, accessible with the panel door closed.