What this RCBO carries and where it fits
The Siemens SENTRON 5SU1354-7FM16 is a 2-pole (1P+N) RCBO — a combined residual-current device and miniature circuit breaker in a single 36 mm wide unit, occupying 2 width units on the DIN rail. Rated 16 A at AC with a C tripping characteristic, it handles moderate inrush from motorized or lighting loads without nuisance trips. The Type A fault-current detection catches pulsating DC residual currents — the common profile from single-phase rectifiers, VFDs, and switching power supplies found on modern control panels. Breaking capacity is 10 kA per EN 60898, which covers most commercial and light-industrial distribution boards where the prospective short-circuit current stays under that threshold. The energy limiting class 3 means it lets through less let-through energy during a fault, reducing stress on downstream wiring and connected equipment. Ambient temperature range of -25 to +55 °C, with a detailed derating curve from 30 °C (16 A) down to 12.32 A at 70 °C — useful if the RCBO sits in a warm enclosure or near other heat-generating devices. Mounting position is any, so vertical or horizontal DIN-rail orientation is acceptable.
Panel fit and wiring constraints
Dimensions are 36 mm wide, 90 mm high, 77 mm deep, with an installation depth of 70 mm — standard for a 2-module DIN-rail device. Accepts solid or stranded conductors from 0.75 to 35 mm², covering most distribution and sub-feed circuits. Protection class IP20 when installed in a distribution board with connected conductors — this is an enclosure-rated device, not for open-panel or washdown locations. Halogen-free and silicon-free construction matters for environments where outgassing during a fault could damage sensitive electronics or violate low-smoke specifications. Supply can enter from either top or bottom, simplifying panel layout. Overvoltage category III suits fixed installation downstream of the main distribution board.