What this 3VA1 breaker brings to your panel
The Siemens 3VA1140-4ED32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker with a 40 A fixed thermal-magnetic trip unit (TM210, FTFM). Its 36 kA breaking capacity at 415 V AC (class S) means it can safely interrupt high fault currents on a 400 V distribution bus without needing an upstream current-limiting fuse — a key spec for panel builders sizing main or feeder breakers in industrial switchboards.
Fixed settings, no dials to mis-set
Overload protection (Ir) is fixed at 40 A; short-circuit pickup (Ii) is fixed at 10 × In (400 A). No adjustment dials means no risk of an incorrect setting during commissioning — the protection curve is locked at the factory. The nut keeper kit included with this variant is specific to DC Power OEM builds in China, so verify the mounting hardware matches your enclosure's gland plate before panel integration.