The Schneider Electric A9A26977 is an Acti9-series padlocking device designed for toggle switches. It ships as a set of 5 units in yellow, locking the toggle in both the OFF and ON positions. The padlock hole accepts shackle diameters from 2 to 4 mm, and the locking mechanism is sealable for tamper-evident lockout/tagout procedures.
The 2...4 mm padlock diameter range covers the common small-shackle padlocks used in panel lockout kits — anything from a standard Master Lock No. 1 to a compact safety padlock fits. Locking both the OFF and ON positions means you can secure the toggle in either state, which matters when the controlled circuit must stay energized for testing or must remain de-energized for maintenance. The sealable design lets you add a wire seal or tamper-evident tag for audit-trail compliance on safety-critical circuits.
Panel Integration
This is a snap-on accessory for Acti9 toggle switches on DIN-rail-mounted breakers and switch-disconnectors. The yellow color is standard for lockout devices across the Acti9 family, making it visually distinct from the gray/white switch bodies. The set of 5 covers a small panel or a single machine's isolation points in one order line.