The 3RB3026-1SB0 is a Siemens SIRIUS solid-state overload relay, sized S0, with a CLASS 10E trip characteristic. It's rated for a thermal current of 12 A and a maximum operating voltage of 690 V. The "tripped" note on the relay signals that the auxiliary switch (integrated) has changed state after a motor overload — the 97/98 contact is what you'd wire into the control circuit to trigger an alarm or stop command. Mounts directly onto a contactor via the M4 main contact screws, in any position, and fits a 45 mm wide footprint (87 mm tall, 84 mm deep).
RoHS compliance date is 10/01/2009 per the substance prohibitance entry, meaning it meets the EU RoHS directive for products placed on the market after that date.
Terminals accept solid or stranded wire: 1x (0.5…4 mm²) or 2x (0.5…2.5 mm²) on the control side, and up to 2x 10 mm² stranded on the main current circuit. Screw terminals require a Pozidriv PZ2 tip with a 5–6 mm shaft diameter. Shock resistance is 15g / 11 ms; the signaling contact in tripped position is rated 9g / 11 ms. Vibration resistance: 1–6 Hz at 15 mm amplitude, 6–500 Hz at 20 m/s², 10 cycles per axis.
The auxiliary contact ratings are given for several voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.55 A at 60 V, among others. These are the switching capacities for the integrated signaling contact — useful when matching to a PLC input or relay coil. Power dissipation per pole is 0.2 W, which keeps the heat low inside a compact panel.