The Siemens 3RU2116-1JC0 is a SIRIUS thermal overload relay, Size S00, designed for motor protection with a Trip Class 10 characteristic. It mounts directly onto a contactor, saving DIN-rail space in the panel. The relay uses a thermal bimetallic release mechanism and provides an integrated auxiliary switch for signaling a tripped condition. Rated for a maximum operating voltage of 690 V, the relay supports AC-3e motor switching up to that voltage. Motor power ratings are 4 kW at 400 V, 5.5 kW at 500 V, and 7.5 kW at 690 V, with corresponding current ratings of 10 A at 480 V and 600 V. The auxiliary contact switching capacity covers a wide control-voltage range: 2 A at 24 V and 230 V, 3 A at 120 V, 1 A at 400 V, and 0.75 A at 690 V, among other ratings. This allows direct interfacing with PLC inputs or contactor coils across common control voltages.
The relay fastens directly onto a contactor (contactor mounting), eliminating the need for separate DIN-rail clips. It occupies a 45 mm width, 87 mm height, and 70 mm depth — a compact S00 footprint that fits tightly packed motor starter assemblies. Wiring uses spring-loaded terminals on the main current circuit, accepting 2x (0.5 to 2.5 mm²) solid or stranded conductors. A 3 mm screwdriver shaft is specified for the terminal screws.
The 3RU2116-1JC0 is listed as current production (active lifecycle stage). It remains a standard catalog item in the SIRIUS family, not subject to phase-out as of the latest manufacturer records. The relay carries a substance prohibition date of 10/01/2009, indicating RoHS compliance.