It breaks 6 kA per IEC 60947-2 and 4.5 kA per EN 60898 — enough for most final subcircuits in commercial and light industrial panels. Rated for any mounting position, pollution degree 3, overvoltage category III — fits standard distribution boards and sub-panels without special derating.
The 6 kA rating under IEC 60947-2 gives headroom over the 4.5 kA EN 60898 figure — the higher standard applies when the breaker is used as a standalone device in industrial control panels, not just as a domestic consumer unit. Energy limiting class 3 means it restricts let-through energy well — important for downstream component protection and cable coordination in dense panels.
This is a current-production part in the Siemens SENTRON 5SY3 family. No phase-out or last-time-buy has been announced.
Operating temperature range -40 °C to 75 °C, with humidity derating above 55 °C (max 95% RH at 55 °C, dropping to 35% at 75 °C). Halogen-free and silicon-free construction, sealable for tamper evidence. Combined top and bottom terminals simplify busbar feed-through.