What it is — and what the rating means for your panel
Siemens SENTRON 3VA2325-5HN32-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection in distribution panels. The headline number is 250 A continuous current — and it holds that 250 A flat from 40 °C all the way to 70 °C ambient, no derating curve to chase. That matters when the breaker lives in a hot enclosure or next to other heat sources. Breaking capacity is the other number that decides fit. At 240 V it clears 187 kA; at 415 V it's still 121 kA. Drop to 500 V and it handles 75.6 kA. At 690 V it's 7.5 kA — still enough for most industrial service-entrance applications but that's the limit. If your fault-current study comes in above the 690 V figure, this isn't the frame.
What's built in — auxiliary switch and undervoltage release
Factory-fitted with 2 HQ auxiliary switches and an undervoltage release (UVR). The UVR trips the breaker when control voltage drops below a threshold — standard for emergency-stop circuits or undervoltage protection on motor feeders. The basic switch platform is 3VA2325-5HN32-0AA0, meaning the aux and UVR are pre-assembled at the factory, not field-add-on kits.
Panel fit — dimensions and mounting
Footprint is 110 mm deep, 138 mm wide, 248 mm tall. Bolts into a standard MCCB mounting plate or DIN-rail adapter. No communication module onboard — this is a straight line-protection device, no Modbus or PROFIBUS bridge inside.