The Siemens 5UB1915-0SB01 is the soft black colour variant of the 5UB1915 DELTA i-system Schuko socket. It combines a spring-loaded hinged cover with increased touch protection in a matte soft black finish, giving designers and specifiers a dark-colour option within the 55×55 mm DELTA i-system format.

What does the -0SB01 suffix mean?

The -0SB01 suffix designates the soft black (soft black / matte black) colour finish within Siemens' DELTA i-system part numbering. The base model 5UB1915 is white; appending -0SB01 replaces the white cover with a soft black finish. All electrical and mechanical specifications remain identical to the base model.

When would I specify soft black over standard white?

Soft black sockets are specified in commercial interiors, hospitality, retail, and high-end residential projects where dark-colour switchgear is part of the interior design scheme. Dark sockets visually recede against dark wall finishes, stone, or timber panelling, and they complement black or dark-grey switch and frame programmes. They are also less likely to show dirt and finger marks in high-traffic public areas.

Does the soft black finish wear off with use?

The colour is integral to the thermoplastic material — not a surface coating or paint. It does not wear off, scratch through to a white base layer, or fade under indoor lighting conditions. The matte surface finish is the same quality grade as the standard white and titanium white variants in the DELTA i-system range.