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2 in stock
This listing is for a USED Siemens 3RV1031-4FB10 with an installed Siemens 3RV1921-1M auxiliary contact block. Combining thermal overload and magnetic short-circuit protection in a SIRIUS motor protection platform, this unit supports motor branch circuit protection while providing additional status signaling contacts for control and monitoring functions. Frequently integrated into motor starters, conveyor systems, manufacturing equipment, and industrial control panels requiring both protection and auxiliary feedback.
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