What this MCCB delivers
The Siemens SENTRON 3VA2325-5HL32-0JH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current, with an ETU320 electronic trip unit for line protection. It carries a shunt trip (STL) auxiliary release and comes with 2 auxiliary switches plus a trip alarm switch (HQ). Breaking capacity hits 187 kA at 240 V AC and 121 kA at 415/440 V AC — numbers that tell you it's built for high-fault industrial panels where selectivity and SCCR headroom matter.
Breaking capacity across voltages
This MCCB's interrupting rating drops as voltage climbs: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. The 690 V figure is the one to watch if you're feeding a 690 V drive or transformer — 17 kA is still a solid number for most downstream gear, but it's where the headroom narrows.
Thermal derating
Rated 250 A from 40 °C through 50 °C ambient. Above that it derates: 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, 225 A at 70 °C. If the panel runs hot — say, near a drive cabinet — factor that curve into your bus sizing.