The Siemens 3RB3133-4WW1 is a SIRIUS solid-state overload relay in size S2, rated for a continuous thermal current of 80 A. It protects motor circuits by monitoring current through straight-through transformers and signaling a "tripped" message when the motor current exceeds the upper setting value by a factor of 3.5, or when it drops below the lower setting.
Designed for stand-alone installation in any mounting position. Shock resistance is rated at 15g for 11 ms (signaling contact drops to 8g / 11 ms in the tripped position). Vibration resistance covers 1–6 Hz at 15 mm amplitude and 6–500 Hz at 20 m/s² over 10 cycles.
Solid or stranded conductors: accepts 1x (0.5–4 mm²) or 2x (0.5–2.5 mm²) per terminal. Screwdriver requirement is Pozidriv PZ2 with a shaft diameter of 5 to 6 mm. The auxiliary switch is integrated, with contact ratings specified at multiple control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.3 A at 125 V. Power dissipation per pole is 0.07 W.
Compliance and substance restrictions
The part carries a substance prohibitance date of October 15, 2014, indicating compliance with RoHS and REACH substance restrictions as of that date.