The Siemens SIRIUS 3RU6116-0HB1 is a thermal overload relay for three-phase motor protection, adjustable from 0.55 to 0.80 A with a Class 10 trip characteristic. It sits in the Size S00 footprint and is designed for stand-alone installation with screw-type terminals on both the main and auxiliary circuits.
The adjustable current range of 0.55–0.80 A determines which motor FLA this relay protects — set it to match the motor nameplate full-load amps exactly. Class 10 trip means it will open within 10 seconds at 600% of the set current, which is the standard for standard induction motor starting (not high-inertia loads that need Class 20 or 30). Rated operational current is 0.8 A at 690 V, 50/60 Hz, with a total typical power loss of 4.5 W (4.8 W hot). Operating temperature spans -40 to +70 °C, with storage range of -55 to +80 °C. Mounting position is any orientation, with 6 mm clearance to grounded parts on the side. The relay accepts 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²) solid/stranded on the main circuit, and similar on the auxiliary circuit. Tightening torque for main contacts is 0.8–1.2 N·m.
This is a stand-alone mount relay — it does not clip directly onto a contactor but wires in separately. It's sized for the SIRIUS S00 contactor frame (3RT2 series), meaning it shares the same panel footprint and terminal layout.