The Siemens 5SY6632-7 is a SENTRON miniature circuit breaker in a 4-pole 3P+N configuration, meaning it switches three phases and the neutral — the neutral pole is switched but not protected, which is the standard arrangement for TN and TT systems where you want isolation on all conductors but only overcurrent protection on the phases. The C characteristic (tripping between 5× and 10× In) is the default for general-purpose loads like small motors, lighting banks, and control transformers where inrush isn't extreme but you still need some headroom above resistive loads.
Breaking capacity — two ratings, one decision
This breaker carries dual breaking-capacity ratings: 6 kA per IEC/EN 60898-1 (the household-and-similar-installation standard) and 15 kA per IEC 60947-2 (the industrial-standard for panelboards and motor-control centers). The 15 kA figure at 400 V AC means it can safely interrupt a fault current up to that level without welding contacts or cascading upstream — that's the number your coordination study cares about. For DC circuits, it's rated 15 kA at 60 V (max 72 V) per IEC 60947-2, which covers most industrial DC control buses and small UPS feeds.
Panel fit and environmental limits
Mounts in any position via the quick-assembly system (snap-on DIN rail). At 72 mm wide (4 modular units), it occupies four standard 18 mm slots. Depth is 76 mm with 70 mm installation depth behind the panel face — check your enclosure depth if you're retrofitting into a shallow gland plate. Ambient range runs -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, then 55% up to 70 °C, 35% up to 75 °C). Pollution degree 3 (conductive pollution or dry non-conductive that becomes conductive — typical for industrial control rooms without strict climate control). IP20 with conductors connected, which is standard for DIN-rail components inside a closed panel; no washdown rating, so keep it behind the enclosure door.
Standards and compliance documentation
Designed to IEC/EN 60898-1 and IEC/EN 60947-2, with UL 1077 recognition (supplementary protector). The UL 1077 path gives a 5 kA interrupting rating at 400 V AC — useful if the panel ships to North America and the inspector wants a UL-listed component on the secondary side of a branch circuit. Halogen-free and silicon-free construction, which matters for clean-room or semiconductor-adjacent installations where outgassing contaminates optics or wafers. The sealable option (tamper-evident cover) is available for revenue-metering or safety-lockout applications.