The contacts are rated for 10 A maximum, but that figure is tied to specific voltage and duty conditions. At 24 V the switch handles 2 A; at 230 V it handles 4 A; at 400 V it handles 3 A; at 690 V it handles 10 A. The AC-15 rating at 690 V is 1 A — that's the inductive-load rating for solenoid and contactor coils, which is the real-world limit for most control circuits at that voltage. The 110 V and 220 V ratings (0.5 A and 0.25 A respectively) cover the older control-voltage standards still common in retrofit work.
Fastening is plug-in fixing — it snaps onto the side of the breaker without tools. Screw-type terminals accept two conductors per clamp: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), or 2x (20 to 14 AWG). The front is finger-safe per IEC 60529 (IP20), so it meets the touch-protection requirement for exposed panel wiring. Dimensions: 90 mm high, 9.5 mm wide, 70 mm deep.