Motor protection MCCB with shunt trip — 500 A frame, 330 kA interrupting
The Siemens SENTRON 3VA2450-7MN32-0JC0 is a 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, rated 500 A at 40 °C and carrying a 330 kA interrupting capacity at 240 V. That interrupting rating drops to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and 15.3 kA at 690 V — so the SCCR headroom shrinks fast above 500 V; verify your available fault current at the point of common coupling before specifying.
Current derating and thermal budget
Rated current holds flat at 500 A from 40 °C up to 50 °C, then derates to 495 A at 55 °C, 490 A at 60 °C, 485 A at 65 °C, and 480 A at 70 °C. Maximum power loss is 99 W.
Three-pole footprint fits standard SENTRON mounting patterns; the shunt trip and auxiliary switch block add depth behind the panel face. No undervoltage release is fitted, and no communication module is included — the only electrical accessories are the shunt trip and two HQ aux switches.