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. The 70 mm depth and 101.6 mm width fit standard Siemens SENTRON panel footprints; the IP40 front protection means it is suited for enclosed switchboards, not open washdown environments. Rated insulation voltage is 800 V, so it can be applied in 690 VAC systems without derating the insulation path.
Thermal-magnetic curve and derating
The TM210 release is a fixed thermal-magnetic type — no interchangeable trip units, no electronic adjustment. 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. The operating temperature range spans -25 °C to 70 °C; storage range extends from -40 °C to 80 °C.
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.