The Siemens 3VA1450-5EE32-0AA0-ZD00 is a 3-pole IEC frame 630 circuit breaker from the 3VA1 series, rated for a breaking capacity class M with an Icu of 55kA at 415V. It's configured for line protection with a TM220 thermal-magnetic trip unit (ATFM), an In of 500A, overload protection adjustable from 350A to 500A, and a fixed short-circuit protection setting of Ii = 10 x In. The suffix ZD00 indicates a nut keeper kit, specified for a DC Power OEM in China. The adjustable Ir band lets you fine-tune the overload pickup to match the actual continuous load, avoiding nuisance trips on inrush while still protecting the cable.
For BOM-line commitment, the key ratings to verify fit are the 55kA Icu at 415V, the 500A frame rating, and the adjustable overload band of 350A to 500A.
Integration Notes
The 3-pole design with a 500A frame means it occupies the same footprint as other 3VA1 frame 630 units, so panel layout and busbar planning should account for the full-width drawout or fixed-mount configuration. The nut keeper kit (ZD00 suffix) is a mechanical accessory for captive hardware — verify it matches your panel's termination method. The fixed short-circuit trip at 10 x In (5000A) is non-adjustable on this TM220 unit. For selectivity studies downstream, that Ii value is the threshold above which the breaker trips instantaneously; coordinate with upstream devices rated for higher short-time withstand.