Allen-Bradley 800T-H3304A Cylinder Lock Selector Switch

Allen-Bradley 800T-H3304A is a 30 mm diameter, two-position cylinder-lock selector switch engineered for rugged panel mounting in industrial automation. This keyed variant uses a D025 key code and supports key removal from both sides, enabling secure changes to the control state and preventing tampering when the panel is unattended. The switch presents one normally open and one normally closed contact configuration, making it suitable for sequencing, interlock logic, and switching between two operating states in a single device. As part of the 800T family, it accepts standard 30 mm operator hardware and integrates with Rockwell Automation contact blocks for reliable field serviceability and straightforward replacement. The 800T-H3304A is designed to be used in applications such as start/stop control, mode selection (manual vs automatic), and lockable control paths on equipment like conveyors, presses, and packaging lines, where a physical key is required to alter the circuit. Its cylinder-lock mechanism provides a physical barrier to rotation without the proper key, helping ensure the selected state remains intact between maintenance cycles.