S00 frame, CLASS 10 trip — what that means for motor protection
The 3RU2116-1CB0-ZW96: This is a Siemens SIRIUS thermal overload relay in the S00 frame size — the smallest in the SIRIUS modular system, sized for contactors up to about 7 kW at 400 V. The "ZW96" suffix on the order code signals a factory-fitted auxiliary contact block configured to signal a "Tripped" message — the relay carries an integrated auxiliary switch that changes state when the bimetal strip has tripped, so a PLC or annunciator sees the fault without extra wiring.
Mounting and panel fit — direct contactor mount, any orientation
The relay fastens directly onto the matching SIRIUS contactor — no DIN rail bracket needed, no separate footprint. Mounting position is unrestricted — the thermal bimetal is temperature-compensated from -40 °C to +60 °C, so the relay can be mounted horizontally, vertically, or flat without recalibrating the trip curve. The dimensions are 45 mm wide, 76 mm high, 70 mm deep — the depth is the overhang past the contactor face, so the total depth of the contactor-plus-relay stack is about 70 mm from the mounting surface.
Auxiliary contact ratings and the tripped-signal variant
The 0.3 A at 60 V and 0.11 A at 220 V figures fill the intermediate voltages common in legacy control circuits. The "for message Tripped" note means the auxiliary contact is wired as a normally-open that closes on trip — the PLC input sees a dry contact close when the bimetal releases, not a break. This is the standard configuration for a remote fault indication loop.
Sourcing and compliance — active production, RoHS dated
RoHS compliance is documented with a substance prohibitance date of 10/01/2009 — the relay meets the EU RoHS directive effective from that date.