It mounts directly onto a contactor — no separate base needed — and uses a bimetallic thermal release that tracks motor heating.
Rated insulation voltage is 690 V, and the AC-3e rated maximum voltage matches at 690 V — so it's good for 400 V and 480 V systems with headroom. The auxiliary contacts are integrated, not a bolt-on add-on: at 24 V they switch 2 A, at 120 V they switch 3 A, and at 230 V they switch 2 A. That covers most PLC input and contactor coil circuits. At 690 V the auxiliary contacts still handle 0.75 A, enough for signaling on higher-voltage control schemes. Power dissipation per pole is 1.6 W — three poles total 4.8 W at full load. In a crowded S00 panel that heat adds up, so leave breathing space around the relay. The integrated auxiliary switch means no separate block to buy and wire, which saves a DIN-rail slot and a wiring step. That covers most indoor and outdoor cabinet conditions — no derating needed for a typical 40 °C panel ambient.
Fastening method is contactor mounting — it snaps directly onto the matching SIRIUS contactor, no screws or DIN-rail clip required. Main current circuit connection uses ring cable lugs, and the main contact screws are M3. The screwdriver spec is Pozidriv PZ2 with a shaft diameter of 5 to 6 mm. That's the standard S00 footprint — fits the same panel cutout as the contactor it mounts on.