What this relay does on the line
The Siemens 3RU6116-0JB1 is a SIRIUS thermal overload relay sized for motor protection on a 3-phase line drawing 0.7 to 1 A full-load current.
The adjustable current range of 0.7 to 1 A is the primary selection gate: set it to match the motor nameplate FLA. At 690 V rated insulation voltage (pollution degree 3) and 6 kV surge withstand, the relay holds up on 400/480 V line-fed panels without additional isolation. The 3-pole main circuit handles all three phases; the auxiliary circuit provides a normally-closed trip contact and a normally-open signal contact for the PLC or safety circuit.
Stand-alone installation means the relay does not require a contactor base — it mounts directly to the panel or DIN rail via the S00 clip. Any mounting position is allowed, which simplifies layout in a tight cabinet. Main circuit terminals accept 2× (0.5 to 1.5 mm²) solid or 2× (0.75 to 2.5 mm²) stranded, or 2× AWG 20-16; auxiliary terminals take 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²), AWG 20-16 or 18-14. Tightening torque for main contacts is 0.8 to 1.2 N·m. Allow 6 mm side spacing to grounded parts for creepage clearance.