The 3RB1066-1LG0: The 300-630A range covers large motor loads — think 150-315 kW at 400V. Class 10 trip means it clears a stalled rotor within 10 seconds at 7.2x FLA, which is standard for standard-duty induction motors driving pumps, fans, and compressors. The MOD.S10/S12 designation indicates adjustable trip class settings, so you can dial it down to class 10 for faster protection on sensitive loads or up to class 30 for high-inertia starts. The mounting rails let you snap it onto a 3TF68 or 3TF69 contactor without extra brackets, keeping the panel footprint tight.
Siemens 3RB1066-1LG0 solid-state overload relay, 300-630A
MPN3RB1066-1LG0
Siemens 3RB10 series solid-state overload relay, 300-630A, class 10, MOD.S10/S12, with mounting rails for contactor mount on 3TF68/69 or separate mounting.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What is the current rating range of 3RB1066-1LG0?
It is rated 300-630A, suitable for large motor loads typically in the 150-315 kW range at 400V.
Where can I buy 3RB1066-1LG0?
This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.
MPN
3RB1066-1LG0