The Siemens 5SY4516-7CV is a miniature circuit breaker (MCB) rated for Icu=15kA at 230/400V, in a 1P+N configuration with a C16 trip curve. The C16 curve (trips at 5-10x In) is sized for general-purpose loads like lighting and small motor circuits where inrush is moderate.
Panel Integration
The 1P+N format (switched phase plus switched neutral) fits standard DIN-rail enclosures. The neutral pole is switched and protected, making this suitable for single-phase sub-distribution boards where neutral isolation is required. The C16 rating (16 A rated current) governs the downstream cable and load sizing — match to 2.5 mm² copper for typical runs.