The Siemens SENTRON 3VA1163-6MH32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A at 40 °C, designed for starter protection in motor branch circuits. It carries a 220 kA breaking capacity at 240 V AC — that's the short-circuit current it can safely interrupt without welding contacts or rupturing the case, which matters when you're feeding a motor starter downstream of a high-fault transformer.
Rated current and thermal derating
The 63 A rating holds steady from 40 °C to 50 °C, then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If this breaker sits in a packed enclosure near other heat sources, that 58 A at 70 °C is the number to size against — not the 63 A at 40 °C. The TM120M thermal-magnetic release handles the overload curve, so the breaker doubles as a motor-protective device, not just a straight feeder.
Breaking capacity by voltage
Breaking capacity drops as voltage rises: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That steep drop above 440 V means this breaker is really at home on 240 V or 415 V systems — at 690 V the 7.5 kA figure may still cover a low-fault industrial panel, but verify against your available fault current.
Lifecycle and sourcing
The lifecycle stage is marked as current production, so this order code is still a standard catalog item from Siemens. It is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Physical fit and panel integration
Dimensions are 130 mm high, 76.2 mm wide, and 70 mm deep. That 76.2 mm width is a 3-inch footprint on the DIN rail — three modules wide, same as a standard 3-pole MCCB. The front face carries an IP40 protection rating, so it's fine for a dry indoor enclosure but not for washdown areas. Rated insulation voltage is 800 V, and maximum power loss at rated load is 17.3 W — factor that into your enclosure thermal budget.