The Siemens 3RT2627-1AF05 is a SIRIUS capacitor contactor, purpose-built for switching power-factor-correction capacitor banks. It's rated for AC-6b duty, which is the utilization category that covers capacitor switching — the high inrush current and the re-strike voltage that come with it.
Key ratings in context
The headline switching ratings tell you what it can handle in real panel conditions: 6 A at 230 V AC, 3 A at 400 V AC, and 1 A at 690 V AC. At 24 V it switches 6 A. These are AC-6b values, so they reflect the capacitor load — not a motor or resistive load. The contactor also has a 24 V DC coil rated for 6 A. The arcing time is a tight 10 ms, which matters when you're coordinating with upstream fuses or breakers in a power-factor bank.
That depth is the full body depth including terminals — plan for it in your gland-plate clearance. The screw terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm². Stranded: 2x 1–2.5 mm² or 2x 2.5–10 mm². The coil is screw-type terminals.