Locking element Multi 9 OEM and Resi9 for miniature circuit breakers or residual current circuit breakers. In ON or OFF position. This locks the miniature circuit breaker in the open or closed position. Thanks to the trip-free mechanism, the miniature circuit breaker also trips in the locked ON position. Padlock facility available. Diameter of the locking element - max. 8 mm. Insulation - according to IEC/EN 60947-2.