The Siemens SENTRON 3VA1150-6ED42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 50 A at 40 °C, fitted with a TM210 thermal-magnetic release for line protection. Its interrupting capacity reaches 220 kA at 240 VAC, stepping down to 154 kA at 415 V and 121 kA at 440 V — figures that place it squarely in high-fault-current distribution panels where upstream transformer capacity is large.
Thermal-magnetic curve and derating
Rated current holds flat at 50 A from 40 °C through 50 °C, then begins a gentle roll-off: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. In a sealed, uncooled enclosure that sees 60 °C internal ambient, plan for 48 A continuous load, not the full 50 A. Maximum power loss is 14.6 W — negligible for a single breaker, but worth summing across a multi-unit panel for thermal budgeting.
Breaking capacity by voltage
The 3VA1150-6ED42-0AA0 delivers 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. The steep drop above 440 V is typical of MCCBs with this frame size — at 690 V the 17 kA rating still covers most industrial motor branch circuits, but verify against the available fault current on 690 V buswork.