The Siemens 3RU2116-0CB1 is a SIRIUS thermal overload relay in size S00, designed to protect motors against overcurrent and phase failure. Its CLASS 10 trip curve means it will trip within 10 seconds at 7.2× the set current — fast enough for most standard induction motor starts, but verify against your motor's acceleration time if you have a high-inertia load. Rated insulation voltage is 690 V, and the auxiliary contact set is integrated, not a bolt-on. Power dissipation per pole is 1.6 W, so in a dense panel with several relays side-by-side, account for thermal buildup — mounting position is any, but free airflow helps keep the compensation curve accurate from -40 to +60 °C.
Lifecycle status for 3RU2116-0CB1 is current production. No end-of-life notice or last-time-buy date. Sourced to order against an RFQ through independent distribution.
Mounting is stand-alone installation or direct onto a SIRIUS S00 contactor. Screw terminals for the main circuit accept 2×(0.5…1.5 mm²) or 2×(0.75…2.5 mm²) solid or stranded. The auxiliary switch is integrated, so no separate module is needed for the trip signal. Dimensions are 89 mm height, 45 mm width, 80 mm depth — fits a standard DIN-rail enclosure with room for the contactor below.