The Siemens SENTRON 3VA2325-6HN32-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current across its full operating temperature range of -25 °C to 70 °C — no derating needed from 40 °C up through 70 °C, which simplifies panel thermal budgeting. It is designed for line protection, meaning it sits at the main incoming feed or a major subfeed, not downstream branch protection.
Breaking capacity and selectivity
Breaking capacity is the headline number for this class: 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. The 242 kA at 240 V tells you this breaker can interrupt a fault current up to that level without self-destructing — critical for high-available-fault-current installations like large transformer secondaries or utility tie points. The 7.5 kA at 690 V is a steep drop; if your system runs at 690 V, verify the available fault current stays under that limit or coordinate with an upstream current-limiting device.
Built-in undervoltage release and auxiliary switches
This variant ships with an undervoltage release (UVR) factory-installed — the entry confirms it. That means the breaker trips automatically when supply voltage drops below a threshold, used in safety circuits or to prevent motor re-acceleration after a brownout. It also carries two HQ auxiliary switches for remote status indication. No communication function, so this is a hardwired panel, not a networked breaker.
Physical fit
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. That 138 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — verify panel cutout and busbar spacing against your existing layout. The 110 mm depth includes the arc-chamber and terminal depth; leave clearance for cable bending radius below the line-side lugs.
Power loss and thermal management
Maximum power loss is 40 W. In a sealed, non-ventilated enclosure, that 40 W contributes to internal temperature rise. If the panel also houses other heat sources (contactors, drives, power supplies), factor this into the thermal calculation — the breaker itself is rated for 70 °C ambient, but adjacent components may not be.