What this MCCB is and what it protects
The Siemens 3VA1163-5EE36-0AA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in distribution panels — it guards feeder cables and buswork against overloads and short circuits, not motor or branch loads. Rated 63 A continuous at 40 °C through 50 °C, it holds that rating without derating across the most common panel ambient range; at 70 °C it still carries 58 A. The TM220 overcurrent release combines a thermal bimetal for overloads and a magnetic trip for short-circuits, adjustable to match the cable ampacity. Breaking capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 440 V. At 500 V and 690 V it still interrupts 17 kA. Those figures mean this breaker handles high-fault-current scenarios typical of large transformer secondaries or industrial switchboards — a standard 10 kA or 25 kA MCCB would weld its contacts in the same fault. The 800 V rated insulation voltage confirms it is built for 400 V class systems with margin.
Panel fit and mounting
Three-pole, 76.2 mm wide (3 in), 130 mm tall, 70 mm deep — fits standard SENTRON 3VA mounting bases and busbar systems. The 70 mm depth (2.76 in) leaves room behind a 200 mm deep enclosure for wiring and lug access. No undervoltage release, no voltage trigger, no communication function, no ground-fault monitoring — this is a bare line-protection MCCB with the TM220 release only. If you need shunt trip, UVR, or aux contacts, those are add-on accessories that mount to the same frame.
Lifecycle and sourcing reality
Power loss at rated current is 17.3 W maximum — negligible for panel thermal budgeting but worth noting if you are packing multiple breakers in a sealed enclosure. Operating temperature range -25 °C to 70 °C; storage from -40 °C to 80 °C. The 70 mm depth and 76.2 mm width match the standard SENTRON 3VA footprint, so swapping into an existing panel that uses the same base is straightforward.