What this breaker is and what the ratings mean for fit
The Siemens 3VA1150-5GF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker (MCCB) from the 3VA1 series, built for line protection with a TM240 thermal-magnetic trip unit. The key number for a sourcing decision is the 55 kA Icu at 415 V — that is the maximum short-circuit current it can safely interrupt at that voltage, which determines whether it holds under the available fault current at the panel. The adjustable overload protection Ir spans 35 A to 50 A, and the short-circuit pickup Ii is set at 5 to 10 times In (50 A), so it coordinates with downstream branch protection without nuisance tripping on motor inrush.
Deployment context and panel integration
This breaker mounts on a DIN rail or panel-mount plate inside an IEC distribution board. The 4-pole configuration with 100% N-conductor protection suits three-phase four-wire systems where the neutral is not derated. The nut keeper kit included indicates it was ordered for a DC Power OEM assembly in China — the kit keeps terminal nuts captive during wiring, a time-saver on repetitive builds.