The Siemens 5SU1654-7KV13 is an FI/LS protector (combined RCD/MCB) in a 1+N-pole form factor, Type A sensitivity per PSE/SSF requirements. It carries a C-curve 13 A overcurrent trip and a 300 mA rated residual current (IΔn), with a 10 kA breaking capacity. The 70 mm module width fits standard DIN-rail distribution boards.
What the ratings mean for fit
Type A detection means the device trips on sinusoidal AC residual currents and on pulsed DC residual currents up to 6 mA — the minimum needed for single-phase rectifier loads like switched-mode power supplies, LED drivers, and variable-speed drives on the line side. The 300 mA IΔn is a fire-protection threshold, not a personnel-protection threshold (30 mA is the touch-safe level); this unit is sized for circuits where the primary concern is cable insulation degradation or slow-developing earth faults, not direct human contact. The C-curve 13 A overcurrent characteristic handles moderate inrush from motorized loads and capacitive filter banks without nuisance tripping, while still clearing short circuits up to 10 kA at the rated voltage.
Deployment context
Snap-on DIN-rail mounting for 70 mm of panel width. The 1+N-pole arrangement switches the line conductor only; the neutral is switched internally for disconnection but not overcurrent-protected. Intended for single-phase final subcircuits in commercial or industrial distribution boards where Type A residual-current protection is specified by local wiring rules (PSE/SSF).