The Siemens 5UB1407 is the DELTA profil SCHUKO Type F socket with an integrated labeling field — a small transparent window on the socket face where a paper strip or printed label can be inserted to identify the circuit. It is the same Type F receptacle as the 5UB1403, with one added feature that becomes essential at scale.

Why label a socket?

In an office floor with 200 identical SCHUKO sockets spread across 12 distribution boards, tracing a single outlet back to its breaker without labels means tripping circuits one by one. A labeled socket tells the facilities manager "L2.14-D3" at a glance — second floor, distribution board L2, circuit 14, phase D3. This is a requirement in many commercial tender documents and increasingly common in high-end residential where lighting and socket circuits are zoned by room and function. The labeling field turns a generic socket into an addressable point on the electrical plan.

How does it differ from the 5UB1403?

Electrically and mechanically identical — 10/16A, 250V, screwless plug-in terminals, 65x65mm plate, titanium white. The only difference is the labeling window integrated into the cover plate below the receptacle opening. The window does not affect plug insertion, IP rating, or frame compatibility. If labeling is not required, the 5UB1403 is the simpler choice. If it is, the 5UB1407 eliminates the need for adhesive labels or handwritten marker on the plate.