The Siemens 3RU2116-1AB0-ZX95 is a SIRIUS thermal overload relay, size S00, Class 10 trip class, rated 690 V. It mounts directly to a contactor and includes an integrated auxiliary switch that signals a tripped condition — the note on this variant reads "for message Tripped". This is the relay that sits between the contactor and the motor, protecting against sustained overcurrent by thermally modeling the motor heating curve.
Trip class and switching ratings
Switching capacity varies with voltage: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, and 0.3 A at 60 V. These are the make/break ratings for the auxiliary contacts — match them to your control circuit voltage or add an interposing relay.
Fastens directly to the contactor via the contactor mounting method — no DIN rail bracket needed, though it can sit on the rail if the contactor is rail-mounted. Size S00 footprint: 45 mm wide, 76 mm tall, 70 mm deep. Screw-type terminals for the main circuit, accepting 2× (0.5…1.5 mm²) or 2× (0.75…2.5 mm²) solid or stranded. Pozidriv PZ2 screwdriver tip, shaft diameter 5…6 mm. Mounting position any — installs vertically, horizontally, or upside-down without derating the thermal curve. Temperature compensation active from -40 to +60 °C; operating ambient -40 to +70 °C. Storage and transport range -55 to +80 °C.
Current production stage — no phase-out notice on this variant. Substance prohibitance date 10/01/2009 aligns with RoHS compliance; the relay carries the standard SIRIUS documentation package (CE, UL, CSA, EAC) per the brand's declaration. No special compliance rider needed for most industrial panels.