The Siemens 3VA1110-4EF32-0AA0-ZD00 is an IEC frame 160 molded-case circuit breaker (MCCB) in the 3VA1 series, rated for 36 kA interrupting capacity at 415 V AC across three poles. The TM240 thermal-magnetic trip unit provides adjustable overload protection from 70 A to 100 A (Ir) and fixed short-circuit protection set at 5 to 10 times In (Ii). This variant includes a nut keeper kit, configured for a DC Power OEM application in China.
Ratings and what they mean for fit
The 36 kA Icu at 415 V places this breaker in breaking capacity class S — it safely clears fault currents up to that level without welding contacts or cascading failure upstream. For a 415 V distribution board feeding motor control centers or transformer secondaries, this rating handles the prospective short-circuit current typical of a 1 MVA to 2 MVA transformer secondary. The 100 A frame and adjustable Ir (70–100 A) let you size the overload to the actual load, not the frame max, avoiding nuisance trips on a 75 A conveyor drive or 80 A pump feeder.
Deployment context
This 3-pole MCCB mounts in a standard panel or enclosure on a DIN rail or directly to a mounting plate via the 3VA1 accessory kit. The nut keeper kit indicates the breaker ships with captive hardware for the DC Power OEM's busbar or cable lug connections — a detail that saves panel-build time compared to sourcing loose hardware.