The Siemens 5SJ6116-6 is a 1-pole SENTRON miniature circuit breaker with a B tripping characteristic, rated for 16 A at 240 V AC and 6 kA breaking capacity per both EN 60898 and IEC 60947-2.
At 16 A and 240 V AC single-phase, this breaker covers a standard 16 A final subcircuit. Overvoltage category 3 and pollution degree 2 mean it's rated for fixed-installation distribution boards, not for outdoor or harsh-environment enclosures without additional sealing. The DC rating of 60 V maximum means this same 1-pole unit can also protect a 48 V or 60 V DC control bus — handy for mixed AC/DC panels where you want one breaker type across both supplies.
Panel fit and environmental tolerance
The 18 mm width (1 modular unit) leaves room for adjacent breakers or accessories in a crowded enclosure. The 20 000 mechanical switching cycles are typical for an MCB in a panel that sees occasional manual switching, not daily load-break duty.