The 5SY4416-5 is a SENTRON 4-pole miniature circuit breaker rated 16 A, 400 V AC, Type A, with breaking capacities of 10 kA, 20 kA, 15 kA (DC), and 5 kA; this is a current production part.
Mounts via the quick assembly system in any position. Occupies 4 width units (72 mm wide, 90 mm tall, 76 mm deep, 70 mm installation depth). IP20 with conductors connected; touch protection and sealable. Halogen-free and silicon-free — relevant for cleanroom or food-industry panels.
Rating details
Type A tripping characteristic trips on short-circuit and overload with a more sensitive magnetic threshold than Type B or C — suited for semiconductor protection or long cable runs. Rated for 50/60 Hz. Humidity limits to 95 % at 55 °C, tapering to 35 % at 75 °C. Overvoltage category III.
Among the 5SY4 series, this 16 A 4-pole Type A sits between higher-current and lower-current siblings. The Type A characteristic — with its lower magnetic pickup — sets it apart from the more common Type B or C variants in the same frame. For a direct drop-in check, cross-reference the rating plate: any peer with identical poles, current, trip curve, and breaking capacity will fit the same footprint, but the tripping behavior must match your load.
Current production run; no last-time-buy schedule in evidence.