What the 2.8–4 A adjustment range means for motor protection
The 3RU6116-1EB1 is a SIRIUS thermal overload relay sized for motor protection in the 2.8 to 4 A full-load current band — set the dial to the motor nameplate FLA and the bimetallic element tracks the thermal load, tripping the contactor on overcurrent before the winding insulation degrades. Rated operational current is 4 A at 690 V, 50/60 Hz, with a surge voltage withstand of 6 kV — the insulation coordination covers 400/480 V panels with headroom for transient events on the line side.
Panel fit and wiring — size S00, stand-alone, any orientation
Mounting position is unrestricted, so it fits in vertical or horizontal panel layouts; side spacing to grounded parts needs 6 mm minimum to maintain creepage distances at 690 V.
Environmental tolerance and compliance
Operating ambient spans -40 to +70 °C, with storage/transport down to -55 °C and up to +80 °C — enough for unheated warehouses or outdoor cabinets in temperate climates. Relative humidity 0–90 % non-condensing. Shock rated 8g / 11 ms per IEC 60068-2-27, so it holds calibration under vibration from contactors and motor starters in the same enclosure. RoHS and REACH compliance declared with substance prohibitance date 05/01/2012 — the relay is free of the restricted substances listed in those directives.