The Siemens SENTRON 5SJ3632-7 is a 4-pole (3P+N) miniature circuit breaker rated at 32 A with a C tripping characteristic. It breaks fault currents up to 4.5 kA per EN 60898 and IEC 60947-2 at 400 V AC. That 4.5 kA rating means it's sized for standard commercial and light industrial distribution boards where the prospective short-circuit current stays under that threshold — common in most building-installation panels. The C-curve (5-10x In) handles motor and lighting inrush without nuisance tripping on start-up, which is the usual call for this class of MCB.
Lifecycle status is marked as current production. That means this order code is still the active catalog number — no phase-out notice, no last-time-buy clock running. For a BOM line that calls out 5SJ3632-7, you're not looking at a forced cross-reference or a surplus hunt yet. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
Mounts on DIN rail in any orientation — the mounting position is unrestricted. Installation depth is 70 mm, and it occupies 4 width units (about 72 mm of rail space). The IP20 rating (with connected conductors) is standard for enclosed panel mounting; it's not a standalone outdoor device. Terminals accept solid or stranded conductors from 0.75 mm² up to 25 mm², which covers most downstream load wiring. The sealable design (yes) allows the installer to lock the cover after commissioning — useful for tamper-proofing in shared-access panels.
Rated insulation voltage is 440 V AC, with an overvoltage category of 3 — standard for fixed-installation distribution boards. Ambient operating range is -20 to +45 °C, with a storage range of -40 to +75 °C. Mechanical endurance is rated at 20 000 switching cycles typical. The breaker is halogen-free and silicon-free, which matters for environments sensitive to outgassing (clean rooms, certain food-processing areas). Vibration resistance is tested to IEC 60068-2-6 at 50 m/s² from 25 to 150 Hz.