The 3RU6116-1KB1 is a Siemens SIRIUS thermal overload relay sized for motor protection in stand-alone installations. Its adjustable current response range of 9 to 12.5 A and Class 10 trip characteristic mean it protects motors with a full-load current in that band against sustained overloads — the Class 10 rating ensures it trips within 10 seconds at 7.2× the set current, fast enough for most standard induction motors starting across the line. The Size S00 footprint is the compact frame that mates directly with S00 contactors in the same SIRIUS family, so if you're already running S00 contactors, this relay drops onto the same mounting interface without adapters. Rated operational current is 12.5 A at 690 V, 50-60 Hz. The 3-pole design covers three-phase motor circuits. Screw-type terminals on both main and auxiliary circuits accept 2× (0.5...1.5 mm²) solid or stranded, or 2× (0.75...2.5 mm²) finely stranded with ferrule — standard panel wire. Tightening torque for main contacts is 0.8...1.2 N·m.
Deployment context and sourcing
This relay mounts in any position via stand-alone fastening — no DIN rail required, though it can be panel-mounted alongside other SIRIUS gear. With a width of 45 mm, depth of 80 mm, and height of 89 mm, it fits a compact panel footprint. Required spacing to grounded parts at the side is 6 mm. Relative humidity tolerance of 0 to 90% handles non-condensing conditions.
Compliance and auxiliary ratings
Surge voltage resistance is rated at 6 kV, with insulation voltage of 690 V at pollution degree 3. Shock resistance per IEC 60068-2-27 is 8g / 11 ms. Power loss totals 5.1 W typical, with 6.6 W at rated current in hot operating state and 2.2 W per pole. Auxiliary contact ratings: 2 A at 24 V, 0.22 A at 110 V, 2 A at 230 V. The relay carries substance prohibitance compliance dated 05/01/2012 — consistent with RoHS/REACH requirements.