What does the 2.5 mm² wire capacity cover in practice?

The 5UB1101-5KK is the most commonly stocked DELTA Schuko insert at European electrical distributors, and its 2.5 mm² rating maps directly to the dominant conductor size in residential and office wiring across CENELEC markets. A 2.5 mm² copper conductor carries 16 A in a standard installation — matching the socket rating exactly. For most projects this is the no-compromise choice: the 2.5 mm² limit is not an artificial cap but a natural match to the conductors already specified for 16 A radial and ring circuits.

How do the three plastic DELTA inserts compare?

The DELTA plastic Schuko range offers three terminal options at three weight points: the 5UB1100-5KK with screw terminals (4 mm², 57 g), the 5UB1101-0KK with screwless terminals (no stated gauge ceiling, 55 g), and this 5UB1101-5KK with screwless terminals (2.5 mm² stated limit, 46 g). Pick the screw-terminal 5UB1100-5KK for industrial panels or mixed-gauge wiring. Pick the 5UB1101-5KK as the standard residential/commercial screwless insert. The 5UB1101-0KK sits between them — same screwless convenience, marginally heavier build.