The Siemens 5SU1354-0LV16 is an FI/LS combination unit — an RCD (residual current device) and an MCB (miniature circuit breaker) in one 1+N-pole module, rated B-curve 16 A. The residual-current side is Type AC, sensitive to sinusoidal AC fault currents, with a rated residual current IΔn of 30 mA. The overcurrent side breaks fault currents up to 10 kA. The 70 mm depth (D=70mm) is the standard for Siemens' 5SU series, fitting flush in a residential or light-commercial distribution board.
Snap-on mounting to a DIN rail (EN 60715) in a distribution board or sub-distribution panel. The 1+N-pole format occupies a single module width, leaving adjacent slots free for additional circuits. The Type AC RCD is suitable for general-purpose socket-outlet circuits and lighting circuits where only sinusoidal AC fault currents are expected — not for circuits with electronic loads that produce pulsed or DC fault components.