Type F residual protection for frequency-converter-fed circuits
The Siemens 5SU1354-3KK16 is a SENTRON RCBO combining overcurrent protection (B curve, 16 A) with Type F residual-current detection at 30 mA. Type F is specified for circuits where variable-speed drives, frequency converters, or other loads generate mixed-frequency leakage — it responds to AC, pulsating DC, and smooth DC residual currents up to 1 kHz, which a standard Type A cannot reliably detect.
The 90 mm height is standard for the SENTRON range, so it aligns with adjacent MCBs and RCCBs in the same enclosure. Supply can enter from either top or bottom, and the mounting position is unrestricted — the unit operates in any orientation.