The Siemens 3RU1116-0KC1 is a SIRIUS-brand thermal overload relay for motor protection in the S00 frame size, trip class CLASS 10, meaning it will open the circuit within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starts. Rated for AC-3 duty up to 690 V and fitted with cage clamp terminals on the main circuit (2× 0.5–2.5 mm² solid or 2× 0.5–1.5 mm² finely stranded with ferrule), it mounts standalone or on a contactor in the S00 family without needing extra DIN-rail hardware. The front face carries IP20 protection — finger-safe for panel installation — and the relay tolerates 100 % relative humidity during operation, so condensation-prone enclosures are acceptable as long as the mounting surface stays vertical.
Dimensions and panel fit
At 45 mm wide × 92 mm tall × 78 mm deep, this S00 overload relay occupies a single 45 mm slot on a DIN rail or contactor base. The 78 mm depth is the dimension that matters for gland-plate clearance in shallow enclosures — verify the door or cover doesn't intrude into that space. Minimum clearances: 0 mm upwards, forwards, backwards, and downwards; 6 mm at the side. This means you can pack relays tightly in a row without derating, as long as the side gap to adjacent components or enclosure walls is at least 6 mm.
Environmental and lifecycle
Operating temperature spans -20 to +70 °C; storage and transport extend from -55 to +80 °C. Shock rated at 8 g for 10 ms, and altitude limit is 2 000 m without derating. The ATEX approval (DMT 98 ATEX G 001) covers use in potentially explosive gas atmospheres — check the specific zone and gas-group compatibility against your installation's classification.
Auxiliary contact ratings
This relay ships with zero factory-fitted auxiliary contacts (: 0). The auxiliary contact block is ordered separately and snaps onto the front. When sizing the control circuit, use these make/break capacities: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V — all at the respective AC voltage. For DC control, the 110/125 V rating is 0.22 A and 220 V is 0.11 A.
Power dissipation and wiring
At rated AC current in hot operating state, the relay dissipates 5.7 W total (1.9 W per pole). That heat stays inside the enclosure, so factor it into your thermal budget — especially in a densely packed panel with multiple S00 devices. Main circuit terminals accept 2× 0.5–2.5 mm² solid or 2× 0.5–1.5 mm² finely stranded with ferrule (AWG 24–14). Surge voltage resistance is 6 kV, and the reference code per DIN EN 81346-2 is F (protective device).