500 A MCCB with 187 kA SCCR — selectivity headroom for high-fault panels
The Siemens SENTRON 3VM1450-5MH32-0AA0 is a 3-pole molded case circuit breaker rated for continuous 500 A at 40 °C, with a maximum breaking capacity of 187 kA at 240 V AC and 121 kA at 415 V AC. That SCCR headroom means it can sit upstream of lower-rated branch breakers in a high-fault panel without cascading failure — the interrupting rating stays intact through a bolted fault at those voltages.
Thermal derating and power dissipation — panel fill factor matters
The 500 A rating holds flat from 40 °C through 50 °C; above that it derates linearly to 452 A at 70 °C.
Sourcing and compliance documentation
The manufacturer provides standard compliance documentation including RoHS, REACH, and IEC/UL certification data sheets for the SENTRON series — request these with your RFQ if they are not already on file.