What this RCBO delivers on the panel rail
The Siemens SENTRON 5SU1354-1LB13 is a 2-pole (1P+N) RCBO rated at 13 A with a C tripping characteristic, meaning it handles moderate inrush from motor starters or lighting ballasts without nuisance tripping, while still clearing overloads within the standard thermal-magnetic curve. Its 10 kA breaking capacity per EN 60898 covers most commercial and light industrial distribution boards fed from a transformer of typical impedance. The unit occupies 2 width units (36 mm) on a DIN rail, with an installation depth of 70 mm and overall depth of 77 mm — fits standard 80 mm deep enclosures. Rated current derates with ambient temperature: 13 A at 30 °C, 12.48 A at 40 °C, 11.96 A at 50 °C, 10.53 A at 65 °C, and 10.01 A at 70 °C. For a panel running at 45 °C ambient, expect 12.22 A continuous — enough margin for a 10 A resistive load or a 1.5 kW motor circuit. The RCBO is halogen-free and silicon-free, which matters for clean-room or semiconductor-adjacent installs where outgassing contaminates optics or wafers.
Terminal capacity and wiring flexibility
Both solid and stranded conductors from 0.75 mm² up to 35 mm² are accepted. The supply cord can enter from either top or bottom. Overvoltage category III means it's rated for fixed installation downstream of the main distribution board.
Coordination and selectivity notes
Energy limiting class 3 aids downstream coordination with smaller MCBs. The type of fault current is AC, so it's not suitable for pulsating DC or smooth DC fault currents. The test circuit requires a minimum of 195 V to operate the test button.