What this 3VA2 MCCB is and what it carries
The Siemens 3VA2325-6HM32-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) in a line-protection configuration, rated for 250 A continuous current (Iu) at 40 °C through 50 °C ambient, with an ETU330 electronic trip unit. It is a 3-pole device with a rated insulation voltage (Ui) of 800 V, meaning it can be applied in 480/277 V and 600 V distribution panels without derating for voltage. The breaking capacity is 242 kA at 240 V, 187 kA at 415 V, 85 kA at 440 V, 55 kA at 500 V, and 7.5 kA at 690 V — so at typical 480 V distribution levels you have high fault-current headroom, but at 690 V the interrupting rating drops sharply, which matters if this breaker is applied in a 690 V drive input circuit.
Thermal derating and panel integration
This MCCB holds full 250 A rating up to 50 °C ambient, then derates linearly to 220 A at 70 °C (–). In a sealed panel with limited convection, that 70 °C derate figure is the one to design to if the breaker sits near other heat sources. Dimensions are 248 mm high, 138 mm wide, 110 mm deep (–) — a 3-pole frame that fits standard Siemens 3VA2 mounting patterns. Front IP40 means the breaker face is protected against tools and wires >1 mm, but the body is not sealed against washdown; keep it in a dry enclosure. Maximum power loss is 37.5 W, which adds to the panel thermal budget.