When does a hinged cover matter?

The spring-loaded flap on the 5UB1920 closes automatically when no plug is inserted. It serves two purposes: it keeps dust and debris out of the socket contacts — relevant in workshops, basements, and utility rooms — and it acts as a physical barrier against accidental contact, making it harder for a child to push an object into the live terminals. The flap is not a child-safety lock (the 5UB1920 does not carry a shutter/lock mechanism requiring simultaneous insertion of both pins), but it adds a meaningful layer of passive protection that a bare socket does not offer.

What does increased touch protection add?

Increased touch protection (erhöhter Berührungsschutz) means the live contacts are recessed deeper inside the socket body than on a standard Schuko outlet, making it impossible to touch them with a standard test finger (VDE 0620). On the 5UB1920 this combines with the hinged cover for dual-layer protection — the flap blocks casual access, and the recessed contacts block deliberate probing. This combination makes the 5UB1920 the preferred choice for family homes, schools, and public-access areas where both dust ingress and tamper resistance matter.

How does the 5UB1920 differ from the full-featured 5UB1922?

Both have the hinged cover and increased touch protection. The 5UB1922 adds a labeling field — a small transparent window for inserting paper labels (circuit number, room designation). If you do not need to label individual sockets, the 5UB1920 saves 8 grams of material and roughly 10 % on unit cost versus the 5UB1922. In practice, labeling becomes useful at roughly 6+ sockets per room — below that, visual identification by position is faster than reading labels.