The Siemens 3RB1026-2RB0 is an electronic overload relay rated for 0.1 to 0.4 A, Class 20 trip curve, with screw terminals and a size S0 footprint designed for direct contactor mounting.
The size S0 form factor and screw connection match the standard Siemens S0 contactor interface, so it snaps onto the contactor without additional wiring brackets — keeps panel layout tight and reduces termination points.
