Siemens 5SL3032-7 SENTRON MCB — 32 A, C-Curve, 1P+N
The Siemens 5SL3032-7 is a SENTRON miniature circuit breaker rated 32 A at 30 °C with a C tripping characteristic, 1P+N poles, and a 4.5 kA breaking capacity per EN 60898.
The 32 A rating holds at 30 °C ambient; at 40 °C it derates to 30.46 A, at 50 °C to 28.84 A, and at 60 °C to 27.12 A. The 1P+N configuration switches the line pole and provides a switched neutral — the neutral is not protected but is disconnected when the breaker opens. That's common in single-phase final subcircuits where you need to isolate both conductors for safe maintenance.
The 18 mm width (one modular unit) means you can pack 12 of these per 216 mm of rail. Touch protection is built in on the line side terminals.