The 3-pole construction suits three-phase feeders or branch circuits. Its interrupting capacity reaches 187 kA at 240 V AC, dropping to 121 kA at 415 V and 75.6 kA at 440 V — figures that cover most industrial service-entrance and distribution applications where high fault current is a concern.
For cold-chain or freezer applications, the -25 °C operating floor means it runs cold and stays cold — no condensation issues at sub-zero panel temperatures.
The 3VA1125-5EF32-0AH0 measures 70 mm deep, 76.2 mm wide, and 130 mm tall. The 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint for Siemens SENTRON 3VA breakers — it drops into a panel designed for that family without re-drilling the mounting plate.
Auxiliary switching and signaling
The trip alarm signals a faulted state independently of the auxiliary contacts — useful for remote annunciation in a PLC or SCADA system.