Product Overview and Key Ratings
The Siemens 3RU1116-1BB0-ZX95 is a SIRIUS thermal overload relay in the Size S00 frame, designed for motor protection in control panels. It is a 3-pole device with screw-type terminals for both main and auxiliary/control circuits, and it mounts directly onto a contactor (fastening method: contactor mounting). The relay carries a CLASS 10 trip characteristic, meaning it will trip within 10 seconds at 7.2× the set current — the standard for protecting standard induction motors during start-up. Power dissipation per pole is 1.9 W. The auxiliary contact ratings are specified at several voltages: 1 A at 24 V, 0.22 A at 110 V, 3 A at 120 V, 0.22 A at 125 V, 0.11 A at 220 V, 2 A at 230 V, and 1 A at 400 V. These values govern the switching capability of the integrated auxiliary contacts for control-circuit signalling.
Mounting and Clearance Specifications
The relay measures 45 mm wide, 87 mm high, and 78 mm deep. It mounts on a vertical surface and is rotatable ±135° and tiltable ±45° to the front and back. Required clearances around the device: 0 mm upwards, 0 mm forwards, 0 mm backwards, 0 mm downwards, and 6 mm at the side. This zero-clearance design allows dense panel packing when mounted directly on a contactor.
Conductor Connection Data
Screw-type terminals accept solid conductors: 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²). Finely stranded conductors with core end processing accept the same cross-sections. For the main current circuit, AWG cables: 2x (20... 16), 2x (18... 14), and 2x 12. For auxiliary contacts, AWG: 2x (20... 16) and 2x (18... 14). The reference code per IEC 81346-2 is F.