What this MCCB carries — and where the ratings matter
The Siemens SENTRON 3VA1150-6EF32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 50 A continuous current with a TM240 thermal-magnetic overcurrent release. It is configured as line protection (no undervoltage release, no ground-fault monitoring, no communication function) and ships with one auxiliary switch plus one trip alarm switch (HP type) as standard. Breaking capacity is the headline: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. That 220 kA figure at 240 V places it in the high-interrupting category — suitable for large transformer secondaries or high-fault industrial distribution where a standard 65 kA or 100 kA MCCB would not hold coordination. Thermal derating is flat to 50 °C (50 A at 40 °C, 45 °C, and 50 °C), then drops to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. If the panel ambient runs above 50 °C, size the load side accordingly — the breaker does not lose much, but the 5 A step from 50 °C to 70 °C is real. Rated insulation voltage Ui is 800 V, and the front face carries IP40 protection — fine for a clean indoor panel; not rated for washdown or dust ingress. Mechanical endurance is 15,000 operations, which is typical for a distribution-grade MCCB in a fixed-position switchboard.
Panel fit and integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width is a standard 3-pole MCCB footprint — it fits existing SENTRON 3VA panel cutouts and busbar systems without adapter plates. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The TM240 release is factory-fixed (not field-interchangeable). Trip indicator is present, which helps during commissioning and troubleshooting — you see the trip state on the front without needing to reset to check.
How it compares to the 3VA1010-2ED32-0JA0
The closest functional peer in the SENTRON 3VA family is the 3VA1010-2ED32-0JA0. Both are 3-pole line-protection MCCBs with TM releases, but the 3VA1010 is rated for a lower continuous current (100 A frame vs. 50 A frame on this unit) and carries a different breaking capacity curve. The physical footprint is the same — same height and depth, same 76.2 mm width — so it drops into the same panel cutout without rewiring. The deciding factor is the load current: use the 3VA1150-6EF32-0AG0 when the circuit needs 50 A continuous and the higher 220 kA interrupting rating at 240 V; step up to the 3VA1010 frame if the load exceeds 50 A.