The 3RB1262-0LB00: The 200-820 A current range covers large motor loads — think conveyors, pumps, or compressors in the 100-400 kW ballpark depending on voltage and duty. The S10/S12 frame size means this relay mounts on the corresponding contactor or as a standalone unit; busbar connection on the main circuit handles the high current without cable lugs. Class 5-30 adjustment lets you match the trip curve to the motor's thermal characteristics: Class 5 for submersible pumps or other fast-start loads, Class 30 for high-inertia fans or crushers. Ground fault signaling on a DC 24 V auxiliary circuit is useful for systems that need to differentiate between overload and earth leakage without adding a separate relay.
Siemens 3RB1262-0LB00 Overload Relay, 200-820A, Discontinued
MPN3RB1262-0LB00
Siemens 3RB1262-0LB00, discontinued overload relay, 200-820 A, S10/S12, Class 5-30, DC 24 V, busbar main, screw aux, ground fault signaling.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Product details
Frequently asked questions
Where can I buy 3RB1262-0LB00?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
What is the current range and frame size of 3RB1262-0LB00?
It covers 200 to 820 A and is sized for S10/S12 frames. Main circuit connection is via busbar; auxiliary circuit uses screw terminals.
What trip classes does 3RB1262-0LB00 support?
It supports Class 5 through 30, adjustable to match the motor's starting profile. Class 5 suits fast-start loads; Class 30 handles high-inertia applications.
Does 3RB1262-0LB00 include ground fault signaling?
Yes, it includes ground fault signaling with monostable outputs, operating on DC 24 V control voltage. Reset can be manual, automatic, or remote.
MPN
3RB1262-0LB00