The Siemens 5UB1906 is the lockable variant of the DELTA i-system hinged-cover Schuko socket. It adds a key-operated locking mechanism to the spring-loaded flap, preventing unauthorised plug insertion while retaining increased touch protection and screwless terminals. It is the only lockable socket in the DELTA i-system Schuko range.

How does the locking mechanism work?

The hinged cover incorporates a barrel lock that secures the flap in the closed position. The socket ships with a key; all 5UB1906 units are keyed alike, meaning a single key operates every lockable socket in the installation. When locked, the cover cannot be lifted to insert a plug. When unlocked, the cover operates exactly like a standard spring-loaded flap — lift, plug in, and the cover rests on the plug body.

Where are lockable sockets typically required?

Lockable sockets are specified wherever socket access must be controlled rather than freely available. Common applications include school corridors and classrooms (to prevent students from plugging in unauthorised devices), public waiting areas in hospitals and transport terminals, hotel conference rooms, and commercial spaces where electricity use is metered or billed per tenant. They also prevent accidental disconnection of critical equipment by stopping unauthorised plug removal.

How does the 5UB1906 differ from the non-lockable 5UB1905?

The 5UB1905 and 5UB1906 share the same core specification: electric white, hinged cover, increased touch protection, screwless terminals, 55×55 mm DELTA i-system format. The 5UB1906 adds the barrel lock on the hinged cover — everything else is identical. If access control is not required, the 5UB1905 is the more cost-effective choice. If unauthorised socket use is a concern, the 5UB1906 is the only DELTA i-system socket that addresses it.