What it is and what it does
The Siemens 3RB3016-2NE0 is a SIRIUS solid-state overload relay in size S00, designed to protect motor circuits against overload and phase loss. It uses an electronic overload release, meaning no bimetal drift over time — trip accuracy stays consistent across the temperature-compensated range of -25 to +60 °C. Rated thermal current is 1.25 A at both 480 V and 600 V rated values, with a maximum rated operational voltage of 690 V. The trip class is CLASS 20E — that means the relay will trip in 20 seconds at 7.2× the current setting, standard for general-purpose motor starting where moderate inrush is expected (conveyors, pumps, fans). The auxiliary switch is integrated and rated for switching: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.11 A at 220 V — enough to signal a trip to a PLC input or annunciator panel. The note for message "tripped" confirms the signaling contact position is what the relay reports when the overload release has operated.
Mounting and integration
Fastening method is contactor mounting — the relay clips directly onto a SIRIUS contactor (same S00 frame), saving DIN-rail space. Dimensions are 45 mm wide, 72 mm high, 90 mm deep. Spring-loaded terminals accept 2× (0.25 to 1.5 mm²) solid or stranded wire; use a Pozidriv PZ2 screwdriver with a shaft diameter of 5 to 6 mm for the terminal screws. Mounting position is any, so it fits tight enclosures without derating. Vibration resistance is 1–6 Hz at 15 mm amplitude and 6–500 Hz at 20 m/s² for 10 cycles; shock resistance is 15 g / 11 ms (signaling contact drops to 9 g / 11 ms in tripped position). These ratings mean it holds up on a machine frame or in a mobile equipment panel.