The Siemens SENTRON 3VA1150-5ED26-0AA0 is a 2-pole molded case circuit breaker (MCCB) designed for line protection. It carries a 50 A continuous rating at 40 °C ambient, with an interrupting capacity of 187 kA at 240 V AC and 121 kA at 415 V AC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream. The TM210 overcurrent release combines a thermal bimetal for overload protection and a magnetic coil for short-circuit response. Rated insulation voltage is 500 V; operating voltage is 415 V AC or 250 V DC. Front IP40 protection suits enclosed panel mounting.
Dimensions and panel fit
The 3VA1150-5ED26-0AA0 occupies 50.8 mm width (2 in) per pole, 70 mm depth (2.76 in), and 130 mm height (5.12 in). Standard DIN-rail mount; verify gland-plate clearance for the 70 mm depth in shallow enclosures.
Thermal derating
The 50 A rating holds flat from 40 °C through 50 °C. At 55 °C it derates to 49 A, at 60 °C to 48 A, at 65 °C to 46 A, and at 70 °C to 45 A. No trip indicator; no undervoltage release. The TM210 release is fixed — not field-swappable for an electronic trip unit.