What this MCCB is and what its ratings mean for your panel
The Siemens 3VA1163-4ED42-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the primary feeder or main distribution breaker in a 4-wire (3-phase + neutral) system. Its TM210 thermal-magnetic overcurrent release provides fixed thermal and magnetic trip settings, so no adjustment modules are needed; the breaker is sized at 63 A continuous at 40 °C ambient and holds that rating all the way to 50 °C before it begins to derate (62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, 58 A at 70 °C). That thermal stability means you can pack this breaker into a warm enclosure without losing headroom — a real advantage in a crowded panel. The interrupting ratings are what decide the fit for your service entrance or subfeed. At 240 V it clears 121 kA — high enough for most industrial secondary-side applications. At 415 V it's 75.6 kA, at 440 V it's 52.5 kA, and at 500 V and 690 V it drops to 11.9 kA. That 11.9 kA at 690 V is the limiting factor: if your fault current at 690 V exceeds that, you need a higher-rated frame. The 800 V rated insulation voltage (Ui) confirms the breaker's internal clearance is designed for 690 V line-to-line systems. Four poles with no undervoltage release, no trip indicator, no communication function, and no ground-fault monitoring. This is a straightforward thermal-magnetic MCCB — no auxiliaries, no electronics. The front face carries IP40 protection, meaning tools and fingers are kept out, but it is not sealed against moisture. Mount it in a dry, lockable panel.
Panel fit and footprint
Dimensions: 101.6 mm wide (4 in), 130 mm tall (5.12 in), 70 mm deep (2.76 in). That 4-pole width is the critical dimension for DIN-rail or panel-mount layouts — it occupies four 18 mm module spaces if using a modular mounting base, or the manufacturer's standard MCCB footprint. The 70 mm depth is shallow enough for most 200 mm deep enclosures, leaving room for wiring gutters behind the breaker. Maximum power loss is 17.3 W. That is the heat the breaker dissipates at full rated current. In a sealed enclosure with multiple breakers, sum the losses and check the thermal rise against your enclosure's dissipation curve. A 17.3 W loss per breaker is modest — typically not a ventilation driver unless you have a dozen units in one box.