What it is and what it does
The Siemens 3RU2116-1EB0-ZW96 is a SIRIUS-brand thermal overload relay, size S00, with a trip class of CLASS 10. The relay mounts directly onto a contactor (fastening method: contactor mounting), saving DIN-rail space in the enclosure. At 45 mm wide, 76 mm tall, and 70 mm deep, it fits the S00 footprint and keeps the panel layout tight. The auxiliary switch is integrated and rated for the control circuit: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V — covering typical PLC and relay coil loads. The note "for message 'Tripped'" on the listing means this variant includes a dedicated signaling contact that changes state when the relay trips, feeding a status back to the controller or HMI so the line operator sees exactly which motor dropped out.
Key ratings and what they mean for fit
Rated insulation voltage is 690 V, matching the standard 400/480/690 VAC motor supply systems. Motor power ratings are given per voltage: 1.5 kW at 400 V, 2.2 kW at 500 V, and 3 kW at 690 V — these are the AC-3e (squirrel-cage motor switching) values, so the relay is sized for the motor's full-load current, not the contactor's make/break rating. Temperature compensation is active from -40 °C to +60 °C, meaning the trip curve stays accurate even in an unheated enclosure or next to a hot drive. The relay itself operates from -40 °C to +70 °C and can be stored or transported down to -55 °C and up to +80 °C — wide enough for most global shipping and site conditions. MTTF with high demand rate is 2 280 years — a reliability figure that matters for safety-related applications where the relay is exercised frequently. The screw terminals accept 2×(0.5…1.5 mm²) or 2×(0.75…2.5 mm²) solid or stranded wire, with a Pozidriv PZ 2 screwdriver tip and a 5–6 mm shaft diameter.
Lifecycle and sourcing reality
The part carries a substance prohibition date of 10/01/2009.
Integration and mounting
Mounts directly onto a SIRIUS contactor of size S00 — no DIN-rail bracket needed. The mounting position is any orientation, which helps when the panel layout is tight or the contactor is mounted sideways. The main circuit connections are screw-type terminals; the auxiliary contact is integrated, so no separate add-on block is required for the trip signal.