Headline ratings and what they mean for fit
The Siemens 3VA2325-7MN32-0KH0 is a SENTRON molded case circuit breaker (MCCB) in a motor-protection design, rated 250 A continuously from 40 °C through 70 °C with no derating step across that band — unusual for a 250 A frame, and a strong signal that the thermal-magnetic or electronic trip assembly is oversized relative to the continuous current, so it holds full rating in a warm enclosure. Breaking capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V — these are the SCCR values the breaker can interrupt without welding its contacts or venting arc gas into the panel, so the 242 kA at 415 V covers most industrial 400 V distribution boards, and the 7.5 kA at 690 V is the limit for 690 V motor circuits. Three-pole construction with a shunt trip (STL) auxiliary release and a complement of 2 auxiliary switches plus 1 trip alarm switch HQ. The trip indicator and voltage trigger are present; undervoltage release is not fitted. No ground-fault monitoring module and no communication function — this is a standalone overcurrent and short-circuit protector, not a networked power meter. Phase failure detection is included, which matters for motor protection: if one phase drops out on the line side, the breaker trips rather than letting the motor single-phase and overheat.
Mechanical footprint and panel integration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep (–). The 110 mm depth is the projection behind the panel face — relevant when fitting into a shallow enclosure or a multi-row distribution board where rear clearance is tight.
Lifecycle and compliance posture
Ambient operating range is -25 °C to +70 °C; storage range -40 °C to +80 °C. Maximum power loss 37.5 W — a figure to include in enclosure thermal calculations if the breaker is in a sealed cabinet with other dissipating devices.