The Siemens SENTRON 3VA2163-6HM36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. It carries a continuous current of 63 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel sizing in warm enclosures. Breaking capacity is 242 kA at 240 V, dropping to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 3.8 kA at 690 V. That 242 kA figure at 240 V is the headline — it handles high-fault utility feeds or transformer secondaries where available fault current is extreme.
ETU330 release and adjustability
The overcurrent release is an ETU330 electronic trip unit. Adjustable response time (tr) from 0.5 s to 17 s, giving the panel builder flexibility to coordinate with downstream breakers or motor starters. The latching endurance is rated at 20 000 operations — a solid number for a distribution MCCB that sees infrequent switching.
Physical fit and environment
Dimensions: 86 mm deep, 105 mm wide, 181 mm high. That 105 mm width for a 3-pole 63 A frame is standard for the SENTRON 3VA platform — it fits existing panel cutouts and busbar spacing without rework. Front protection is IP40, adequate for enclosed distribution boards; the unit is not rated for washdown or outdoor exposure. Rated insulation voltage is 800 V, and maximum power loss is 4 W. Operating temperature range is -40 °C to 70 °C, with storage from -40 °C to 80 °C. The 4 W loss is low enough that multiple breakers in a row won't drive internal cabinet temperature significantly.