What this breaker carries
The Siemens 3VA1225-5EF32-0KD0 is a 3-pole IEC frame 250 molded-case circuit breaker rated 250 A continuous with a 55 kA interrupting capacity at 415 V (class M). The TM240 thermal-magnetic trip unit gives adjustable overload protection from 175 A to 250 A and a short-circuit pickup adjustable between 5 and 10 times In. It ships with a left-side shunt trip rated 208–277 V AC 50/60 Hz or 220–250 V DC, plus three auxiliary changeover switches — enough to report breaker status back to a PLC or annunciator without adding a separate contactor block.
Panel integration notes
The 3VA1 frame mounts on a DIN rail or can be screw-fixed to a backplate. The shunt trip and auxiliary switches are factory-fitted on the left side — verify clearance to the gland plate or adjacent devices before wiring. The nut keeper kit is included, so the line and load lugs stay torqued without a separate lock-washer step.