The LW39B ONOFFON manual power cut off cam selector switch is a threeposition control device designed for panel mounting. It provides two active ON positions with a central OFF, enabling safe isolation and clear routing of power between two paths. This switch supports multiple related model families and is specified for panel installations with a 48x48 mm footprint. Key benefits Safe isolation and clear power routing: central OFF keeps circuits safely isolated while two ON positions allow selections between power paths. Simple manual operation: easy to operate in local control panels, maintenance, and commissioning without electrical interlocks. Compact and panelfriendly: 48x48 mm mounting footprint suits standard control panels and minimizes enclosure space. Suitable electrical ratings for industrial use: rated to carry 20 A at up to 660 V, appropriate for many control circuit applications. Flexible compatibility within related families: associated with SZW26/LW2620, LW2820, and D404.4 configurations in the LW39B family, enabling integration in existing panel designs. Key attributes Functionality: ONOFFON cam selector switch with manual actuation for power cut off. Compatibility: part of the SZW26/LW2620, LW2820, D404.4 families; LW39B switch model. Size and mounting: 48x48 mm panel footprint, suitable for standard 48x48 mm cutouts. Electrical ratings: 20 A current rating, 660 V voltage rating. Construction/material: material details are not specified in the listing; designed for industrial control panel applications. Performance: provides two selectable ON paths with a single OFF position to ensure safe servicing and controlled power routing. Use cases Dualsupply motor control: switch between two power sources with a dedicated OFF position to safely isolate one path during changes or maintenance. Machinery maintenance and servicing: use the OFF position to safely disconnect power before servicing components routed through either ON path. Panel power routing in test benches or control panels: quickly select between two feeds or circuits while preserving a clear OFF option for safety and testing. This description reflects the product's brand, specifications, model references, and features as listed: SZW26/LW2620 LW2820 D404.4 ONOFFON Manual Power Cut Off Cam Selector LW39B Switch On 20A 660V 48x48mm.