The Siemens 3VA2125-0HL46-0AA0 is a 4-pole IEC frame 160 molded case circuit breaker with a 200 kA interrupting capacity at 415 V — that is breaking capacity class E, the highest standard short-circuit rating in the 3VA2 family. At 25 A continuous rating (In) with an ETU320 LI electronic trip unit, it gives adjustable overload protection from 10 A to 25 A (Ir) and short-circuit pickup (Ii) from 1.5 to 12 times In, plus a separate neutral protection setting that can be switched off or set to 100% of phase protection. The ETU320 LI trip unit gives you electronic precision versus a thermal-magnetic; you get tighter band control and better selectivity with downstream devices.
The 200 kA Icu at 415 V is the headline number, but the real selection driver is the adjustable overload range (Ir = 10–25 A) and the short-circuit pickup range (Ii = 1.5–12 x In). For a 25 A feeder, you can set Ir to match the actual load current and Ii to coordinate with downstream branch breakers. The neutral protection is independently configurable — OFF or 100% — which matters for 4-wire systems where you may want to omit neutral protection on balanced loads or enable it for harmonic-rich circuits. Terminal connection type, 4-pole configuration, and IEC frame 160 footprint mean it fits standard Siemens 3VA2 switchboard and panelboard mounting arrangements. The packaging dimensions (200 x 169 x 145 mm) give a rough envelope for enclosure cutout planning.
Group Code P360, Product Group 5374 — these are Siemens internal classification codes used for BOM structuring and spares identification. The product family is 3VA Molded Case Circuit Breakers up to 1600 A, IEC, so this breaker coordinates with the larger frame sizes in the same family for selective tripping.