Siemens 3RB1257-0KM21
MPN3RB1257-0KM21
SOLID-STATE OVERLOAD RELAY WITH INTEGRATED THERMISTOR PROTECTION, 125 TO 500 A AC 220 TO 240V 50/60HZ WITH INTERNAL EARTH-FAULT DETECTION 1NO/1NC (OVERLOAD/THERMISTOR) 1NO/1NC (EARTH FAULT) BISTABLE OUTPUTS
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
MPN
3RB1257-0KM21