The Siemens 3RB1016-1PB1 is a solid-state overload relay in the SIRIUS 3RB1 series, rated for motor protection in the 1.5 to 6.0 A range with a Class 10 trip characteristic. Its screw connection on size S00 and the built-on relay connector with manual-automatic reset make it a direct fit for individual mounting in motor control centers or panel-mount applications where a compact, solid-state overload is specified.
The 1.5 to 6.0 A current range covers small to medium motor loads — think fractional-horsepower pumps, fans, or conveyors up to roughly 3 kW at 400 V. The built-on relay connector provides a dedicated output for tripping and alarm signalling — typically wired into the motor starter's control circuit to drop the contactor coil on overload.