The Siemens 3RU2116-1EJ0 is a SIRIUS thermal overload relay in the S00 frame size with a Class 10 trip characteristic. It mounts directly onto a contactor (contactor mounting per the spec), which saves a DIN-rail slot and keeps the power wiring short between the contactor output and the relay's bimetal strips. The auxiliary contact block is integrated, rated for switching at 24 V 2 A, 230 V 2 A, and 400 V 1 A — so it can drive a PLC input or a downstream contactor coil directly without an interposing relay, as long as you stay within the 690 V rated insulation voltage.
Motor power and current ratings
At 400 V, the relay is rated for 1.5 kW motor power; at 500 V, 2.2 kW; at 690 V, 3 kW. The AC-3e rated voltage goes up to 690 V, matching the insulation voltage.
Installation and environment
Mounting position is any orientation, which helps when you're packing relays into a tight panel — no need to keep the bimetal vertical for accurate trip. Operating temperature range is -40 to +70 °C, with temperature compensation active from -40 to +60 °C, so the trip curve stays consistent whether the panel is in a cold warehouse or next to a hot motor. Dimensions are 76 mm high, 45 mm wide, 70 mm deep — the S00 footprint is compact enough for multi-relay banks on a single contactor rail. Main circuit connection uses ring cable lugs with M3 screws; the screwdriver spec calls for a Pozidriv PZ2 tip, 5–6 mm shaft diameter — keep that bit in the panel kit to avoid stripped heads.
Lifecycle and compliance
Substance prohibitance date is 10/01/2009, which aligns with RoHS compliance deadlines; the relay is designed for global markets where RoHS and REACH documentation is expected.