What this breaker is and what the ratings mean
The Siemens 3VA1132-5GD42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker with a 55 kA interrupting capacity at 415 V (breaking capacity class M). That 55 kA rating means it can safely clear a bolted fault up to that level without welding contacts or rupturing the case — critical for high-fault panels downstream of large transformers. The thermal-magnetic trip unit (TM210) is set for a fixed 32 A overload (Ir) and a fixed short-circuit pickup of 10× In (320 A), so it's a dedicated feeder or motor-circuit protector, not an adjustable-frame breaker you'd tune in the field.
Deployment context and panel integration
This breaker mounts on a DIN rail or directly to a backplate in a standard 160 A frame footprint. The 4-pole configuration with 100% N conductor protection means the neutral is switched and protected at the same rating as the phases — required for some DC power OEM builds and for IT or TN-S systems where the neutral is a current-carrying conductor. The nut keeper kit (included per the order-code suffix) simplifies busbar or cable lug torquing in tight enclosures.