What this RCBO is and where it goes
The Siemens 5SU9354-7KK06 is a SENTRON RCBO — a residual-current-operated circuit breaker that combines overcurrent protection with ground-fault detection in a single 2-module-wide (36 mm) package. It is rated 6 A at 30 °C with a C tripping characteristic and clears ground faults at 30 mA.
Mounting and integration
Snaps onto a DIN rail in any mounting position. At 36 mm wide (2 modular width units), it fits standard distribution boards. Installation depth is 70 mm; overall depth is 77 mm. Supply can enter from top or bottom. IP20 rated once wired and installed in an enclosure.
Thermal derating and selectivity
The 6 A rating holds at 30 °C ambient. At 40 °C it derates to 5.64 A; at 45 °C to 5.46 A; at 50 °C to 5.22 A; at 55 °C to 4.86 A. If the panel runs hot, size the circuit accordingly — the C-curve magnetic trip threshold (5–10× In) shifts with the thermal element. Pollution degree 2, overvoltage category III. Energy limitation class 3 means it limits let-through energy for downstream equipment protection. Halogen-free and silicon-free construction matters for clean-room or high-reliability installs where outgassing contaminates contacts or optics.
Lifecycle and sourcing
Current production lifecycle — no end-of-life notification. This is an active Siemens SENTRON catalog line. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.