The Siemens 5SL6516-7MB is a SENTRON 5SL6 miniature circuit breaker rated 16 A at 230 V AC with a C tripping characteristic, 1P+N poles, and a 6 kA breaking capacity per both EN 60898 and IEC 60947-2. The 1P+N configuration switches the line conductor and switches the neutral, which is common in single-phase final subcircuits where you want overcurrent protection on the phase and a switched neutral for isolation.
Rated voltage is 230 V AC single-phase, with a maximum DC voltage rating of 60 V — so it's not a DC solar-string breaker; keep it on AC circuits. The 20 000 mechanical switching cycles typical service life means it's built for daily operation in a panel that sees regular switching, not just a backup disconnect that cycles once a year.
Snap-on mounting to DIN rail, 2 width units (36 mm wide), 76 mm depth, 70 mm installation depth — drops into any standard 35 mm DIN-rail distribution board without adapters. Mounting position any, so you can orient it vertically, horizontally, or even upside-down in a tight enclosure without derating — useful when laying out a dense panel. Sealable design lets you lock the toggle position with a seal wire or padlock to prevent unauthorized reset — common in shared-meter or landlord areas.