The Siemens 5UB1857 is the standard labeling-field variant in the DELTA style SCHUKO range, combining a transparent label window with increased touch protection. Rated at 16A/250V for indoor flush-mount use with a titan white 68×68mm cover plate.

How does the 5UB1857 differ from the 5UB1854?

Both the 5UB1857 and 5UB1854 share the integrated labeling field and increased touch protection, but the 5UB1854 adds a status indicator light (Betriebsanzeige) that shows at a glance whether the circuit is live. The 5UB1857 omits this indicator, making it the simpler and likely more cost-effective choice when visual power confirmation at the socket face is not needed. In distribution boards, equipment rooms, and labeled general-purpose circuits where the circuit status is monitored elsewhere, the 5UB1857 provides the same labeling and touch-protection functions without the added complexity of an indicator.

When to use the labeling field vs. a separate label holder?

The integrated labeling field eliminates the need for adhesive labels, clip-on holders, or handwritten tape on the wall plate. The label sits behind a transparent window in the cover plate, protected from wear, cleaning, and UV fading for the life of the installation. For installations with many labeled sockets — commercial distribution boards, co-working office floors, multi-tenant retail units — the integrated approach saves installation time and maintains a clean visual appearance across dozens of outlets.