SENTRON 5SL4416-6 — 4-pole B-curve MCB at 16 A
The Siemens SENTRON 5SL4416-6 is a 4-pole miniature circuit breaker rated 16 A with B tripping characteristic, designed for 400 V AC multi-phase circuits. Its 10 kA breaking capacity is certified under both EN 60898 and IEC 60947-2 — meaning it can safely interrupt fault currents up to 10 kA at the rated voltage without upstream device damage. That dual-standard rating covers residential/infrastructure installations (EN 60898) and industrial panel applications (IEC 60947-2), so the same part serves both a distribution board and a control cabinet. The B-curve trips at 3–5× rated current (48–80 A magnetic release), which makes it the standard choice for resistive and general-purpose loads — lighting circuits, small heaters, control transformers — where inrush is modest. For motor or transformer circuits with higher inrush, a C-curve sibling would be specified instead.
Panel fit and environmental range
Occupies 4 modular width units (72 mm) on a DIN rail, with 76 mm depth and 90 mm height. The IP20 rating applies with connected conductors — standard for enclosed distribution boards and control panels where the front face is protected but terminals require the enclosure to provide the outer IP barrier. Mounting position is unrestricted, and the 70 mm installation depth leaves clearance for wiring behind the rail. Rated for ambient temperatures from -40 °C to 75 °C, covering most indoor and sheltered outdoor installations. Pollution degree 2 and overvoltage category III suit fixed installations downstream of the main distribution board. The housing is halogen-free and silicon-free — relevant for environments sensitive to outgassing (clean rooms, medical, or certain industrial zones).
Lifecycle and sourcing posture
The part accepts supplementary devices (auxiliary switches, shunt trips, undervoltage releases) via the SENTRON accessory system — field-installable on the left side without removing the MCB from the rail. Mechanical service life is rated at 10 000 operating cycles typical, which is standard for this class of MCB used in panel isolation and branch protection.