Siemens 3RT1024-1B Contactor With Contact Block

Siemens Sirius 3RT1024-1B Contactor with 3RT1926-2EJ21 Contact Block is a compact, 3-pole motor starter designed for reliable control of small-to-medium three‑phase loads in industrial equipment. The 3RT1024-1B model is rated for 12 A in AC-3 service and 40 A in AC-1 service, making it suitable for switching motors, pumps, fans, and other moderate-load applications, with a 3 HP rating at 230 V and 7.5 HP at 460 V in typical installations. This assembly includes the 3RT1926-2EJ21 auxiliary contact block, which adds extra signaling contacts to the control circuit without requiring a separate relay, enabling simple interlock and status signaling options. The combination leverages Siemens SIRIUS engineering for consistent performance, with a common mounting pattern and compatibility across the 3RT contactor family for straightforward integration into existing control cabinets and motor control schemes. Use cases include turnkey motor starters in machine tools, conveyors, and processing lines where a compact form factor and reliable, centralized control are essential. When selecting this unit, verify that your coil voltage and control circuit wiring align with your system specifications and that the auxiliary contact configuration meets your control logic needs.