The Siemens 5SU9106-1DV32 is a combined line-side and residual-current protective device (RCBO) — a single module that packs overcurrent and earth-fault protection into one 1+N-Pole unit. Rated at 32 A, C-curve (magnetic trip between 5–10× In), with a 10 mA residual sensitivity and a 6 kA short-circuit breaking capacity, this unit is sized for residential or light commercial final circuits — think socket outlets, lighting, or small appliance groups where personnel protection against direct contact is required.
The 10 mA residual sensitivity (IΔn) is the key differentiator here — it is below the standard 30 mA used for socket-outlet protection in most domestic installations. A 10 mA RCBO is specified where higher sensitivity is required: medical locations, wet areas, or circuits supplying equipment with low leakage tolerance. The C-curve (32 A) handles moderate inrush loads like fluorescent lighting banks or small motor-driven appliances without nuisance tripping.
Panel integration
The D=70 mm dimension refers to the depth behind the panel; standard distribution boards with 70 mm mounting depth accept this unit without a protruding cover. Spring-cage terminals accept 0.75–25 mm² conductors, and the busbar position aligns with standard Siemens 1+N busbar systems for daisy-chaining multiple RCBOs.