Siemens 3VA1063-4ED32-0KA0 — 63 A MCCB for Line Protection
The Siemens 3VA1063-4ED32-0KA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release and an integrated shunt trip (STL) for remote tripping. Breaking capacity reaches 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — figures that govern selectivity coordination in high-fault distribution panels. Rated insulation voltage is 800 V, and the front face carries IP40 protection, suitable for enclosed panel mounting where dust ingress is limited.
Breaking Capacity and Selectivity
At 415 V, the 75.6 kA interrupting rating positions this MCCB for main or feeder duty in installations where the prospective short-circuit current exceeds what a standard 50 kA or 65 kA breaker can handle — common in industrial substations or near large transformers. The 121 kA at 240 V is typical for North American 277/480 V panels where the line-to-neutral fault current can be extreme; the 690 V rating of 11.9 kA covers 600 V class Canadian and IEC installations.
Physical Fit and Panel Integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — a compact 3-pole footprint that fits standard Siemens 3VA panel cutouts and busbar systems. The TM210 release is thermal-magnetic, adjustable for long-time and instantaneous pickup, with a shunt trip (STL) accessory that accepts a remote trip signal — wired to the auxiliary trip port using the 3VA9688-0BL33 interface.