Siemens 5SL4532-7 SENTRON MCB — 32 A, C-curve, 1P+N, 10 kA
The Siemens 5SL4532-7 is a SENTRON miniature circuit breaker (MCB) rated 32 A with a C tripping characteristic, configured as 1-pole plus neutral (1P+N) for single-phase AC circuits. It carries a 10 kA breaking capacity under both EN 60898 and IEC 60947-2, which means it can safely interrupt fault currents up to 10,000 A without upstream damage — a standard rating for residential and light commercial distribution boards. The C-curve (5–10× In) is the default choice for general-purpose loads with moderate inrush: lighting banks, socket outlets, small motor circuits, and control transformers. At 32 A, this breaker covers a 230 V AC branch circuit pulling roughly 7.3 kW of resistive load, or a mixed load with some motor starting.
Fit and panel integration
The 5SL4532-7 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and height of 90 mm. Installation depth is 70 mm, so it clears a standard 80 mm deep enclosure. The IP20 rating (with connected conductors) is typical for enclosed distribution boards — no special sealing required. Mounting position is unrestricted, which simplifies layout in crowded panels. The housing is halogen-free and silicon-free, meeting material restrictions for rail, marine, and clean-room environments. Sealable with a lead seal or lockout tag, which is useful for utility-metered or rental installations where tamper evidence matters.
Key ratings and what they mean
Breaking capacity: 10 kA per EN 60898 and IEC 60947-2. This is the standard domestic/commercial rating for a 230 V supply with a typical service entrance transformer impedance — sufficient for most residential and light commercial installations where the prospective short-circuit current at the board is under 10 kA. The dual-standard rating means the breaker is certified for both the household (EN 60898) and industrial (IEC 60947-2) application scopes, giving flexibility in specification. Voltage: rated 230 V AC for single-phase operation, with a maximum of 250 V AC. DC rated value is 72 V maximum — usable for DC circuits only within that limit. Frequency: 50/60 Hz, covering both common mains frequencies. Power loss: 2.6 W per pole at rated current in hot operating state — relevant for thermal calculations in sealed enclosures with multiple breakers. Mechanical service life: 10,000 operating cycles typical, which is standard for an MCB in a distribution board that sees infrequent manual switching. Pollution degree 2 and overvoltage category III are the normal ratings for fixed-installation distribution boards.