The Siemens 3RB1262-0LM11 is a SIRIUS overload relay for full motor protection, covering a 200-820 A range in size S10/S12. It's designed for continuous or individual mounting with busbar connection on the main circuit and screw terminals on the auxiliary circuit. The adjustable trip class spans 5 to 30, giving you flexibility to match motor starting characteristics — class 10 for standard starts, class 20 for high-inertia loads, class 30 for very heavy starts. The relay offers manual, automatic, and remote reset options, plus bistable outputs and an overload warning function. Control voltage is AC 220-240 V, 50/60 Hz. This is a full-featured relay, not a basic bimetallic — the electronic design provides consistent trip performance across the ambient temperature range.
No adapter plates or wiring rework required if replacing a same-size SIRIUS relay.
Integration notes
Mounts directly on S10 or S12 contactors via the busbar connection — no separate wiring between contactor and relay. This saves panel space and reduces wiring error risk. The screw terminal aux circuit accepts standard ferruled conductors up to the relay's rated cross-section. The bistable output means the relay holds its trip state even if control power is lost — useful for fault indication in unattended installations. Remote reset allows a PLC or pushbutton to clear the trip without opening the panel door.