The Siemens 3RU1126-1JB0-ZW97 is a SIRIUS thermal overload relay in Size S0, Trip Class 10, designed for motor protection in control panels. The S0 frame size mates with Siemens 3RT2 contactors in the same size class.
Fastened by contactor mounting — clips onto the contactor body, no extra panel space. Clearance requirements: 0 mm upwards, 0 mm forwards, 0 mm backwards, 0 mm downwards, 6 mm at the side.
Wire Terminations
Main circuit terminals accept solid or finely stranded wire with core-end processing: 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²). Auxiliary/control circuit terminals use the same screw-type and wire ranges. AWG equivalents: 2x (20... 16) and 2x (18... 14).
Operating temperature range -20 to +70 °C, storage and transport -55 to +80 °C. Relative humidity up to 100% during operation. Shock resistance 8g / 10 ms. Surge voltage resistance rated at 6 kV.
Auxiliary contact ratings per pole: 2.2 W thermal dissipation. Switching capacities: 1 A at 24 V, 0.22 A at 110 V, 3 A at 120 V, 0.22 A at 125 V, 0.11 A at 220 V, 2 A at 230 V, 1 A at 400 V. These are the make/break ratings for the built-in auxiliary contacts.