The 3RB1015-1PB0: Class 10 means the relay trips within 10 seconds at 7.2× the set current — fast enough to protect standard squirrel-cage induction motors during a locked-rotor or stall event without nuisance tripping on normal starting inrush. The 1.5–6 A adjustment range covers small motors, pumps, and conveyor drives in the fractional-to-3 kW range at 400 V. Size S00 is the smallest SIRIUS frame, designed to mount directly onto a matching S00 contactor (e.g., 3RT2015). The screw connection accepts 0.5–2.5 mm² conductors. Manual reset forces an operator to physically clear a trip — no auto-restart, which is a deliberate safety choice for unattended or hazardous-zone machinery where unexpected re-energization must be prevented.
Where it belongs in the panel
Snaps onto the S00 contactor without additional wiring between the relay and contactor coil — the overload relay's bimetallic or electronic sensing element feeds directly into the contactor's control circuit. The assembly occupies a single DIN-rail mounting position. For a motor starter build, this is the overload block; the contactor handles the switching, the relay handles the thermal protection.