The Siemens 5UB1910 is the green DELTA i-system Schuko socket with screwless push-in terminals. It is the quick-install green variant — designed for electricians who need the SV colour code on a socket that wires up significantly faster than the screw-terminal 5UB1900.

How does the 5UB1910 differ from the 5UB1900?

Both are green Schuko sockets in the 55×55 mm DELTA i-system format, but they differ in two respects:

• Terminals: 5UB1910 uses screwless push-in terminals (tool-free insertion, release button for removal). 5UB1900 uses conventional screw-type plug-in terminals requiring a screwdriver.
• Touch protection: 5UB1910 has standard touch protection. 5UB1900 has increased touch protection (internally shuttered apertures).

Choose the 5UB1910 when installation speed matters and increased touch protection is not mandated. Choose the 5UB1900 when the safety specification demands increased touch protection on colour-coded sockets.

What are screwless terminals and why do they matter?

Screwless push-in terminals accept solid or stranded conductors up to 2.5 mm² without requiring a screwdriver to tighten a clamp. The conductor is pushed into the terminal where a spring-loaded cage grips it securely. Removal is by pressing a release button with a flat screwdriver. In a multi-socket installation, screwless terminals can cut wiring time by roughly half compared to screw-type terminals — a meaningful difference on a project with dozens or hundreds of sockets.

What does the green SV colour code mean?

In German electrical installation practice, green sockets are designated for circuits providing filtered, conditioned, or safety-relevant power. Typical applications include IT/server filtered supplies, medical-area socket circuits, and laboratory or test-bench power that must be visually distinguishable from general-purpose mains. The green colour tells maintenance staff at a glance which sockets belong to a special-quality power supply.