What this breaker is and what the ratings mean
The Siemens 3VA1132-3GF42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker rated 32 A continuous, with a breaking capacity of 25 kA at 415 V — class N, which means it handles the typical fault levels on a 400 V distribution board without needing an upstream current-limiting device. The TM240 thermal-magnetic trip unit gives adjustable overload protection (Ir = 22 A to 32 A) and fixed short-circuit protection (Ii = 5 to 10 x In, so 160 A to 320 A). The 100% N-conductor protection means the neutral pole is fully rated and trips with the phases — important for four-wire systems where a neutral overload could go undetected on a standard 3-pole breaker.