What the ratings mean for the panel
The Siemens SENTRON 3VA1063-4ED32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. At 40 °C it carries a full 63 A continuous current; at 70 °C it derates to 58 A — the thermal curve matters if this breaker sits in a hot enclosure or next to other heat sources. The TM210 overcurrent release provides fixed thermal-magnetic trip characteristics, so no adjustment dials on the front. Breaking capacity is the headline here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. That 121 kA figure at 240 V tells you it handles high-fault-current scenarios — transformer secondaries or large motor banks — without needing a current-limiting fuse upstream. The 800 V rated insulation voltage confirms it is built for 690 V systems with margin. An undervoltage release (UVR) is fitted, so the breaker trips if line voltage drops below a set threshold — typical for safety circuits or to prevent reclosure after a brownout. No communication function, no ground-fault monitoring, no trip indicator. This is a straight line-protection MCCB with a UVR for controlled dropout.
Panel fit and mounting
Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep. That 70 mm depth is shallower than many MCCBs — useful when the backpanel clearance is tight against a gland plate or busway. Three-pole with a fixed TM210 release; no rotary handle or extended shaft in this variant. The UVR adds a control-wire connection; factor that into the terminal layout.