What it is and where it fits
The Siemens 3RU1116-1AB0-ZW98 is a SIRIUS thermal overload relay in Size S00 — the compact frame for contactor mounting up to around 7 A motor full-load current. It provides CLASS 10 trip protection, meaning it will open the circuit within 10 seconds at 7.2× the set current, which is the standard for standard-duty induction motors driving pumps, fans, and conveyors. The relay mounts directly onto a matching SIRIUS contactor (no separate DIN-rail footprint needed), saving panel space.
Key ratings and what they mean for fit
Three-pole design with screw-type terminals on both main and auxiliary/control circuits. The main circuit terminals accept 2× (0.5…1.5 mm²) solid or 2× (0.75…2.5 mm²) solid — that's the range for the motor leads; the auxiliary terminals handle 2× (20…16) AWG and 2× (18…14) AWG. The auxiliary contact is rated 1 A at 24 V, 3 A at 120 V, and 2 A at 230 V — enough to signal a PLC input or drop out a holding contactor. Mounting position is flexible: vertical surface with ±135° rotation or ±45° tilt front/back. The relay is IP20 on the front — finger-safe for a panel interior, but not for washdown. ATEX certification DMT 98 ATEX G 001 means it's approved for use in potentially explosive gas atmospheres when paired with a suitable contactor and upstream protection.