63 A MCCB with TM220 release — panel fit and interrupting capacity
The Siemens 3VA1163-3EE42-0AA0 is a SENTRON molded case circuit breaker rated for 63 A continuous at 40 °C, with a TM220 thermal-magnetic overcurrent release and four poles for three-phase plus neutral line protection. Interrupting capacity reaches 75.6 kA at 240 V and 52.5 kA at 415 V — figures that govern fault-clearing in high-available-fault-current panels, not just the 63 A load rating. Rated insulation voltage is 800 V, and the breaker dissipates 17.3 W maximum at rated load — a number to factor into enclosure thermal budgets when grouping several units on a DIN rail. Front-face protection is IP40, so it's suited for enclosed panel mounting where tools or fingers won't contact live parts through the front cover.
Thermal derating and operating range
The 63 A rating holds from 40 °C through 50 °C; above that it derates linearly to 58 A at 70 °C ambient. That means a panel running at 60 °C ambient can only count on 61 A continuous from this breaker. Operating ambient range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C.
Dimensions and panel integration
The breaker measures 101.6 mm wide, 130 mm high, and 70 mm deep — a 4-pole footprint that fits standard SENTRON mounting positions in distribution panels.