63 A MCCB with TM210 release — what the ratings mean for your panel
The Siemens 3VA1063-4ED32-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic trip unit. That TM210 designation means the thermal element is fixed at 63 A (the frame rating) and the magnetic short-circuit pickup is adjustable — typically 5–10× In, so about 315–630 A instantaneous trip. The 121 kA interrupting rating at 240 V AC tells you this breaker can clear a bolted fault at that level without venting or welding contacts; at 415 V it still holds 75.6 kA, and at 690 V it drops to 11.9 kA. For a 480 V panel, the relevant figure is the 415 V column — 75.6 kA SCCR headroom is enough for most industrial service entrances.
Thermal derating and ambient temperature
The breaker holds full 63 A up to 50 °C ambient. At 55 °C it derates to 60.48 A, at 60 °C to 59.22 A, at 65 °C to 57.96 A, and at 70 °C to 56.7 A. If your panel runs hot — say a non-ventilated enclosure near a furnace line — you need to account for that 6 A drop at 70 °C. The rated insulation voltage is 800 V, so it's fine on 690 V systems with the appropriate derating.
Physical fit and panel integration
Width is 76.2 mm (roughly 3 inches), depth is 70 mm, height is 130 mm. That's a standard SENTRON 3VA1 frame size — it mounts on a DIN rail or directly to a backplate via the integrated lugs. The IP40 front protection means it's splash-proof from the front but not sealed; keep it inside a panel enclosure. The 3-pole design handles three-phase loads; the undervoltage release (UVR) is built in, so if your control voltage drops below the dropout threshold, the breaker trips — useful for emergency-stop circuits or undervoltage protection on motor feeders.
What the TM210 release means in practice
The TM210 is a thermal-magnetic release with a fixed thermal element and adjustable magnetic pickup. The '210' code indicates the frame size and trip characteristics — it's the standard line-protection version, not a motor-protection or electronic release. That means it's sized for cable and busbar protection, not for motor overload curves. If you need adjustable thermal settings or ground-fault protection, you'd step up to an electronic release (e.g., ETU series) in a different 3VA variant.