The Siemens SENTRON 3VA1163-5ED36-0AA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. It's designed for line protection in distribution panels and switchboards.
Breaking capacity — what the numbers mean for your coordination study
This MCCB delivers 187 kA interrupting capacity at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and holds at 17 kA all the way up to 690 V. That's a flat 17 kA from 500 V to 690 V — the spectrum doesn't lie: the arc extinction chamber is tuned for low-voltage high-fault conditions, and the curve tells you this breaker can sit upstream of a 2 MVA transformer without coordination headaches. The rated insulation voltage is 800 V, so the internal clearances and creepage are sized for 690 V line-to-line systems with margin. That 17 kA at 690 V is the same figure you'd see on a larger-frame breaker in this class — the 3VA platform handles the arc energy cleanly.
Thermal derating — the real current you can carry
Rated 63 A from 40 °C through 50 °C ambient. At 55 °C it's 62 A, at 60 °C it's 61 A, at 65 °C it's 60 A, and at 70 °C it's 58 A. That's a derating curve of about 1 A per 5 °C above 50 °C — predictable, linear, and easy to factor into a panel thermal study. If your enclosure hits 70 °C internally, you lose 5 A off the nameplate; plan the load accordingly.
Panel fit and integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole footprint matches standard SENTRON 3VA mounting patterns — it bolts into the same busbar and backplate hole pattern as other 3VA1 frame breakers. Front IP40 protection means it's suitable for enclosed distribution boards where no water spray is expected.