Breaking capacity and standard compliance
The 5SY4220-6 carries a dual-rated breaking capacity: 10 kA per EN 60898-1 for residential/commercial branch circuits, and 20 kA per IEC 60947-2 for industrial panel applications — the higher figure governs when the MCB is specified as a circuit breaker in an industrial distribution board. It also holds a 5 kA interrupting rating per UL 1077 and CSA C22.2 No.235, which qualifies it as a supplementary protector in North American control panels.
Voltage range and DC suitability
Rated 400 V AC (single- or multi-phase up to 440 V) and 60 V DC (max 72 V DC). The DC rating at 15 kA per IEC 60947-2 confirms it can switch DC loads — useful for control circuits or battery-backed supplies — but the DC voltage ceiling limits it to 60 V nominal systems.
B-curve tripping and environmental limits
B-curve characteristic (trips at 3–5× rated current) suits resistive and general-purpose loads where short inrush is not expected — lighting, small transformers, or control power supplies.
DIN-rail mounting and panel fit
Two-module width (36 mm) on DIN rail, 70 mm installation depth, quick-assembly fastening system.