It breaks faults at 6 kA per EN 60898 and 15 kA per IEC 60947-2, so you size it for a service entrance or subfeed with available fault current up to that higher figure; the 15 kA IEC rating covers industrial panel coordination where the upstream transformer can deliver that level. The 1P+N construction switches both the line and the neutral conductor, which is required in some regional wiring rules and for circuits where the neutral must be disconnected for isolation. Two modular-width units (36 mm) snap onto DIN rail; the quick-assembly fastening method means it clips in without tools and releases via a screwdriver slot. Rated for 230 V AC single-phase operation, with a DC rating of 60 V (max 72 V). The operating frequency is 50/60 Hz, so it works on either mains standard without derating. Ambient range spans -40 °C to 75 °C, with humidity derating above 55 °C — the spec table gives the curve: max 95% RH at 55 °C, dropping to 35% at 75 °C. That matters if the breaker lives near a steam source or in an unconditioned enclosure.
Certification and compliance stack
The 5SY6516-6 holds dual certification to IEC / EN 60898-1 (the household-standard MCB test) and IEC / EN 60947-2 (the industrial standard for circuit-breaker performance). It also carries UL 1077 and CSA C22.2 No. 235 recognition at 5 kA, which covers North American supplementary-protector applications. Halogen-free and silicon-free construction — relevant if the panel goes into a clean room, semiconductor fab, or any environment where outgassing from a fault could contaminate optics or wafers. The sealable design lets the installer lock the toggle position with a padlock for lockout/tagout compliance. Lifecycle status is current production.
The 2 MW width means it occupies two 18 mm slots — plan your DIN-rail fill accordingly. Vibration resistance per IEC 60068-2-6: ±1 mm displacement at 5 to 25 Hz, 50 m/s² acceleration at 25 to 150 Hz. That covers most industrial machinery and conveyor applications without needing additional clamping.
Sourcing and cross-reference note
The closest sibling in the SENTRON 5SY family is the 5SY4116-7CV. Both are B-curve 1P+N breakers with the same 6 kA / 15 kA breaking capacities. The 5SY6516-6 carries the UL/CSA supplementary-protector listing at 5 kA; the 5SY4116-7CV does not. If your BOM requires UL recognition for a North American panel, the 5SY6516-6 is the direct fit — the 5SY4116-7CV would need a separate evaluation. Otherwise, they are dimensionally identical and drop into the same DIN-rail footprint without rewiring.