Siemens 3SB1000-4LB20 Pushbutton Switch is a 30 mm panel-mount pushbutton from Siemens' 3SB1000 family, designed for reliable manual control in industrial panels. It serves as the operator input to start, stop, or cycle equipment in an electrical control circuit. The exact electrical ratings and contact configuration are model-specific within the 3SB1000 line and should be verified from Siemens' datasheet for the 3SB1000-4LB20 variant.
