Allen-Bradley 440H-S34033 Safety Interlock Switch

The Allen-Bradley 440H-S34033 (440H-S34033) is a safety interlock switch designed for machine safety guarding and industrial access control systems. Operating as part of the Allen-Bradley safety switch architecture, this heavy-duty interlock unit ensures that access doors, perimeter gates, and machinery access points remain secure during hazardous operational cycles. The switch serves to interrupt control circuits or prevent equipment startup when safety guards are open or displaced, protecting plant personnel and automation equipment from unexpected machine movement. With a robust construction and a catalog weight of 10 kg, the 440H-S34033 is engineered for demanding factory environments where reliable mechanical safety interlock performance is essential. Common installations include automated assembly lines, robotic workcells, packaging machinery, material handling systems, and industrial processing facilities requiring physical guard interlocking. It functions as a direct replacement component for scheduled maintenance, plant repairs, and system overhauls, helping operators maintain equipment reliability and minimize unplanned downtime across automated manufacturing lines.