The 5UB2212-4KK is the clawless aluminium metallic DELTA miro double socket — it pairs the bright aluminium metallic finish with the KK variant's screw-only fixing and plug-in terminals. Two 10/16A 250V Schuko outlets with increased touch protection in a 70×70mm flush-mount format. Compared to the standard -4, it swaps both the mounting method (clawless) and the connection type (plug-in), making it the fastest-installing aluminium metallic option in the range.

Why do the -4 and -4KK differ in both mounting AND terminals?

This is the most split variant pair in the 5UB2212 series. The -4 uses claw mounting with screw terminals — the traditional electrician's combination. The -4KK is its renovation-oriented counterpart: clawless mounting eliminates claw pressure on the box, and plug-in terminals remove the need to tighten screws in a confined flush box. The pairing makes the -4KK the natural choice for retrofit work where speed and box condition are concerns, while the -4 serves new-build installations where screw terminals and claw grip are preferred.

Does the aluminium metallic color look the same on the KK variant?

Yes. The aluminium metallic finish (approximately RAL 9006) is identical across the -4 and -4KK — both are thermoplastic with the same metallic surface treatment. Only the mounting hardware and terminal type change; the visible faceplate and outlet surrounds are indistinguishable once installed.

How fast is plug-in vs screw terminal installation?

Plug-in terminals save roughly 15–20 seconds per conductor compared to screw terminals — strip the conductor to 11–12mm, push it in, done. No screwdriver, no torque judgment. For a double socket with four conductors (line, neutral, and two earth bridges), the total time saving is modest — roughly one minute — but the ergonomic difference in a cramped flush box is meaningful. Less time with arms raised inside a wall means fewer installation errors.

Frequently Asked Questions

Can I use this socket with stranded wire without ferrules?

Plug-in terminals on Siemens DELTA miro sockets are designed for solid conductors without ferrules. Stranded conductors without ferrules may not engage the spring clamp reliably — fit ferrules on stranded wire before insertion. If ferrules are unavailable, choose the screw-terminal -4 instead.

Is the aluminium finish available in other DELTA miro double sockets?

Yes. The aluminium metallic finish appears on the 5UB2212-4 (screw terminals, claw), the 5UB2212-4KK (plug-in, clawless), and the 5UB2212-4 (DELTA miro only — it is not offered in the DELTA line 5UB2211 series). For a single aluminium metallic socket with additional features, the DELTA i-system 5UB193x range offers touch protection, overvoltage protection, and labeling field variants in the same finish.