What the ratings mean for fit
The 3VA1450-6EE42-0AA0-ZD00 is a Siemens 3VA1 IEC frame 630 molded-case circuit breaker with a 70kA breaking capacity at 415V (class H). That 70kA Icu at 415V means it can safely interrupt fault currents up to that level without welding contacts or cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers where available short-circuit current is well above 25kA. The thermal-magnetic trip unit is a TM220 ATFM, with adjustable overload protection (Ir) from 350A to 500A and fixed short-circuit pickup at 10 x In (5000A). The 4-pole configuration leaves the neutral conductor unprotected, which is standard for line-side main breakers where the neutral is bonded to ground and does not require overcurrent protection. The nut keeper kit and DC Power OEM designation indicate this variant is packaged for integration into DC power equipment manufactured in China.
Lifecycle and sourcing reality
For a BOM line requiring a 500A frame 630 breaker with 70kA @ 415V interrupting capacity, this is the exact Siemens order code. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.