Sizing and selectivity
The Siemens SENTRON 5SY5132-7 is a 1-pole miniature circuit breaker with C-curve tripping characteristic, rated 32 A at AC and delivering a 10 kA breaking capacity per EN 60898. That 10 kA rating means it can safely interrupt a fault current up to 10 kA at the panel's service entrance without upstream fuses having to clear first — a key selectivity checkpoint when coordinating downstream branch circuits in a distribution board. C-curve (5–10× In) is the standard choice for mixed resistive and moderate inductive loads — think general-purpose socket outlets, lighting circuits, and small motor feeders where inrush isn't extreme. The 32 A rating at 35 °C derates to 30.46 A at 40 °C and 27.14 A at 60 °C, so if this breaker lands in a warm cabinet the continuous load must be trimmed accordingly.
Panel integration and mounting
Snap-on mounting via quick assembly system — clips onto standard 35 mm DIN rail in any position. At 18 mm width (1 modular unit) it occupies a single slot in the distribution board, leaving room for additional poles or auxiliary devices in the same row. Depth of 76 mm with 70 mm installation depth means it fits flush in standard enclosures without protruding past the DIN rail. Combined top and bottom terminals accept universal-current wiring; polarity only matters for DC applications. Touch protection is built in, and the unit is sealable for anti-tamper applications. IP20 with connected conductors — suitable for dry indoor panels but not washdown areas. Pollution degree 3 and overvoltage category III confirm it's rated for fixed installations inside the main distribution panel, not at the equipment.
Environmental and compliance
Rated for ambient temperatures from -40 °C to 75 °C, with humidity derating above 55 °C. That -40 °C floor makes it usable in unheated shelters or cold storage environments; the 75 °C ceiling matches typical panel interior temperatures under full load.