Motor protection relay for the SIRIUS S00 contactor range
The Siemens 3RU2116-0FC1 is a SIRIUS thermal overload relay in size S00, designed to protect motors against overload and phase loss by monitoring the motor current and tripping the contactor when the thermal model reaches the trip threshold. The overload release is thermal (bimetallic) with an integrated auxiliary switch that changes state on trip, providing a dry-contact signal for the PLC or HMI – the note "for message 'Tripped'" refers to this auxiliary contact's function.
Auxiliary contact ratings across the voltage range
At 60 V the rating drops to 0.3 A, and at 110 V, 125 V, 220 V it is 0.22 A – the lower current at intermediate voltages reflects the arc-quenching limits of the contact gap.
Panel integration – mounting, wiring, and environment
Dimensions are 79 mm deep × 45 mm wide × 102 mm high – the S00 footprint matches the SIRIUS 3RT2 contactor series for a coordinated motor starter package. Temperature compensation is active from -40 to +60 °C, meaning the trip curve stays accurate across the typical panel ambient range without manual adjustment.
Lifecycle and compliance – active production, RoHS dated
Substance prohibitance date is 10/01/2009, confirming RoHS compliance for the European market; the relay also carries the usual Siemens CE and UL marks for industrial control equipment.