
Siemens 3RB1257-0KB40
MPN3RB1257-0KB40
Discontinued type overload relay 125 to 500A for full motor protection SZ S10/S12, class 5 to 30 for mounting onto contactors/individual mounting main circuit: straight-through converter auxil. circuit: screw terminal manual-automatic-remote-reset with analog output monostable outputs ground fault signal DC 24V §§§
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
MPN
3RB1257-0KB40