The Siemens 5SV4748-0 is a 4-pole residual current operated circuit breaker (RCCB) from the RCCBs product family, rated 100 A with a 500 mA sensitivity and a nominal AC voltage of 400 V.
The 100 A rating governs the maximum continuous load the RCCB can carry without tripping on overcurrent — sized for a main incoming feed or a large sub-distribution board. The 500 mA residual sensitivity is higher than the typical 30 mA used for personal protection; it is selected for equipment protection or for circuits where nuisance tripping from leakage is a risk. On a 400 V three-phase system the 4-pole design breaks all live conductors (, L2, L3, N) on a residual fault, which is required for TN and TT earthing systems in many national installation codes. The 78.00 x 97.00 x 85.00 mm packaging dimensions give the footprint for DIN-rail spacing in the enclosure.
The 5SV4748-0 carries an active lifecycle status, meaning Siemens continues to manufacture and support the order code. It has been RoHS-compliant since 02 June 2023, so it meets the current substance-restriction directive for EU markets. The export classification is AL: N / ECCN: EAR99, which places it under no special licensing controls for most destinations. The product class is B — return restricted — so a return for credit requires coordination through a Siemens partner or contact.