Product Identification and Compliance
The Siemens 3RU1116-1FB0-ZW98 is a SIRIUS-branded thermal overload relay, Size S00, designed for motor protection in industrial control panels. It provides CLASS 10 trip protection, meaning it will trip within 10 seconds at 7.2× the set current, per IEC 60947-4-1. This is the standard trip class for standard-duty motor starting applications where the motor accelerates to full speed within a few seconds. The relay is rated for 3 poles in the main current circuit, with screw-type terminals on both main and auxiliary/control circuits. The front face carries IP20 protection, suitable for enclosed panel mounting where no washdown or dust ingress is expected. For audit and compliance documentation, the relay carries a reference code per IEC 81346-2 (F) and a substance prohibitance date of 07/01/2006, indicating RoHS compliance per the EU directive.
Mounting and Integration
This relay is designed for contactor mounting (direct attachment to a matching SIRIUS contactor), not standalone DIN-rail mounting. The fastening method is specified as contactor mounting, so it shares the contactor's panel footprint. Dimensions are 45 mm width, 87 mm height, and 78 mm depth — the depth is the critical dimension for enclosure depth clearance when mounted on a contactor. Mounting position allows a vertical mounting surface with ±135° rotation and ±45° tilt forward/backward. Clearance requirements: 0 mm upwards, forwards, backwards, and downwards; 6 mm at the side. This tight clearance means the relay can be stacked or mounted adjacent to other devices without additional spacing in most directions, though the 6 mm side gap should be maintained for heat dissipation.
Electrical Ratings and Wiring
The auxiliary/control circuit contact ratings are specified across multiple 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 are the switching capacities for the auxiliary contacts, not the main motor circuit — the main circuit is protected by the overload relay's bimetallic strip and trip mechanism, with the auxiliary contacts carrying the signal to the contactor coil or PLC input. Power dissipation per pole is 2.2 W, totaling 6.6 W for all three poles under full load. This heat must be considered in enclosure thermal calculations, especially in sealed panels without forced ventilation. The relay is rated for 100% relative humidity during operation and a surge voltage resistance of 6 kV, confirming suitability for industrial environments with condensation risk and switching transients. Wiring capacity: solid conductors accept 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²); finely stranded with core end processing accepts the same ranges. AWG equivalents for main contacts are 2x (20...16), 2x (18...14), and 2x 12. Auxiliary contacts accept 2x (20...16) and 2x (18...14) AWG. These ranges cover standard motor control wiring from signal-level to power circuits.
Environmental and Mechanical Ratings
Operating temperature range is -20 to +70 °C, with storage and transport range of -55 to +80 °C. The relay withstands shock of 8g for 10 ms, per the specified shock resistance. These ratings confirm the relay is suitable for standard industrial environments, including unheated warehouses during storage, but not for extreme vibration applications without additional damping. The relay carries ATEX approval type DMT 98 ATEX G 001, indicating suitability for use in potentially explosive gas atmospheres when installed in an appropriate enclosure and with proper external protection. This is a significant compliance credential for tender responses in oil/gas, chemical, or mining applications where ATEX certification is mandatory.