SIRIUS 3RU6116-1DB0 — thermal overload relay, 2.2–3.2 A, Class 10, size S00
The Siemens SIRIUS 3RU6116-1DB0 is a thermal overload relay for motor protection, adjustable from 2.2 A to 3.2 A, with a Trip Class 10 characteristic — meaning it trips within 10 seconds at 7.2× the set current, matching standard induction-motor starting profiles for pumps, fans, and conveyors. Rated operational current is 3.2 A at an operating voltage of 690 V, 50/60 Hz, with three poles for the main current circuit. The thermal bimetal release requires no external power for the overload function — it's self-powered by the load current. This relay mounts directly onto a size S00 contactor (fastening method: contactor mounting), saving panel space and eliminating interwiring between the contactor and overload. Screw-type terminals on both main and auxiliary circuits accept 2x (0.5–1.5 mm²) solid/stranded or 2x (0.75–2.5 mm²) finely stranded with ferrules.
The adjustable current response range of 2.2–3.2 A sets the motor FLA window: you dial the relay to match the motor nameplate full-load amps. Class 10 trip curve is the standard for general-purpose squirrel-cage motors — it allows the inrush during start without nuisance tripping, but protects against sustained overload. The 690 V rated insulation voltage (degree of pollution 3) and 6 kV surge voltage resistance mean this relay is suitable for 400 V and 480 V line-to-line systems with adequate clearance. The 2 000 m maximum installation altitude is typical for industrial panels; above that, derate for air density. That's low enough for dense S00 panels — no forced cooling required, but keep the 6 mm side spacing to grounded parts for heat dissipation and clearance.
Mounts directly onto any Siemens S00 contactor (e.g., 3RT201 or 3RT601 series) — no additional bracket or wiring between contactor and overload. The relay snaps onto the contactor's front face, and the main power terminals align vertically (top and bottom arrangement). The relay occupies 45 mm width, 76 mm height, and 70 mm depth — identical footprint to the S00 contactor it mates with. For the main circuit, use 2x (0.5–1.5 mm²) solid or 2x (0.75–2.5 mm²) stranded; for auxiliary contacts, 2x (20–16 AWG) or 2x (18–14 AWG).
Transport range extends to -55 to +80 °C. Shock resistance per IEC 60068-2-27: 8 g for 11 ms. Substance prohibitance date of 05/01/2012 indicates RoHS compliance from that date forward. The relay is designed for motor protection in industrial environments, with pollution degree 3 insulation.