What this MCCB carries — and what it sheds
The Siemens SENTRON 3VA2325-5HL32-0JA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current across the full ambient range from 40 °C to 70 °C — no derating curve to chase down. The 250 A figure holds flat from 40 °C through 70 °C, so in a hot panel near a crusher drive or VFD cabinet you get the same trip threshold without having to down-rate the breaker. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V, and still 75.6 kA at 500 V — that kind of interrupting rating means this breaker can sit at the main or a large feeder where fault currents are high, not just downstream on a light subfeed. At 690 V it still clears 7.5 kA, enough for most 690 V motor circuits in mining conveyors or mill drives.
Line protection with a shunt trip — what that means in a panel
This variant is configured for line protection (cable/feeder protection, not motor or generator), and it ships with a shunt trip release (STL) but no undervoltage release and no auxiliary switch. The shunt trip lets a remote PLC or emergency-stop circuit open the breaker electrically — useful when you need to kill a feeder from a control room or a safety relay without sending a technician to the panel. Dimensions are 248 mm tall, 138 mm wide, 110 mm deep — standard footprint for a 250 A frame in the SENTRON 3VA platform. It fits the same panel cutout and bus-bar spacing as the rest of the 3VA2 family, so swapping from a lower-rated frame or replacing an older 3VF doesn't require re-drilling the mounting plate.
What the ratings mean for your coordination study
The 250 A continuous rating at 70 °C ambient is unusual — most breakers start derating above 40 °C. Here the thermal-magnetic or electronic trip unit is sized so that at 70 °C the breaker still carries its full nameplate without nuisance tripping. For a panel that sits near a hot process or a VFD cabinet, that headroom matters more than a higher number that collapses when the panel door closes. Power loss at rated current is 37.5 W maximum — that's the heat the breaker dumps into the enclosure. For a multi-breaker lineup, add that per pole and check your enclosure's dissipation rating; at 250 A per breaker, three breakers side by side push over 110 W into the cabinet.