The Siemens SENTRON 5SY8216-8BB08 is a 2-pole miniature circuit breaker (MCB) with a D tripping characteristic, rated 16 A at AC and a breaking capacity of 30 kA per IEC 60947-2. It's a magnetic-only trip design — no thermal element — so it responds purely to overcurrent, not to sustained low-level overloads. That makes it a fit for applications where you want short-circuit protection but handle overloads separately (e.g., via a motor-protective relay).
Compliance and approvals
Rated per IEC 60947-2 (30 kA) and also carries a UL 1077 / CSA C22.2 No. 235 rating of 5 kA — that's the supplementary-protector rating for North American panels where the MCB is used as a branch-circuit component, not a main. Halogen-free and silicon-free construction, sealable, with touch protection on the terminals. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.