Ratings that matter for the panel builder
The 3VA2125-8JQ32-0AA0: The 25 A rating holds flat from 40 °C up to 70 °C ambient — no derating curve to chase in a warm enclosure. The 3-pole unit measures 105 mm wide, 181 mm tall, and 86 mm deep, so it occupies a standard MCCB footprint on the DIN rail or mounting plate. Maximum power loss is 0.5 W, negligible for thermal budgeting inside a sealed panel. The ground-fault monitoring uses summation current formation on the L-conductor — it senses imbalance across the three phases plus neutral, which is the standard method for detecting leakage to earth without a separate GFCI module. The communication function onboard means it can report status or trip events to a higher-level controller, useful for remote monitoring in a distribution panel.
Breaking capacity across voltages
Interrupting capacity is specified per voltage: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. The 330 kA at 415 V is the figure most relevant for European 400 V-class industrial networks — it exceeds the typical 50-65 kA available fault current at a secondary substation, so this breaker can be applied close to the transformer without a current-limiting upstream device.
Sourcing and lifecycle
Lifecycle status is current — the 3VA2125-8JQ32-0AA0 is an active catalog item in the SENTRON MCCB family, not subject to a last-time-buy or phase-out notice. For BOM freeze or line-down replacement, this part is sourced and quoted to order through independent distribution; availability and current pricing are confirmed at quote time against an RFQ.