Siemens SENTRON 3VA1163-3EE46-0AA0 — 63 A MCCB, Line Protection, Active Lifecycle
The Siemens SENTRON 3VA1163-3EE46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 63 A at 40 °C, designed for line protection in distribution panels. It carries a TM220 thermal-magnetic overcurrent release — the '22' means the magnetic trip is fixed at 220% of the rated current, so it holds motor inrush without nuisance tripping on a 63 A feeder. Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V, giving solid fault-clearing headroom for industrial service entrances or sub-distribution boards.
Breaking Capacity and Thermal Derating — What the Numbers Mean for Your Panel
The 75.6 kA at 240 V is the high-fault rating for 277/480 V wye systems where the line-to-neutral fault can be severe. At 415 V (common in 400 V three-phase networks) it's still 52.5 kA, and at 440 V it drops to 32 kA. At 500 V and 690 V it holds at 11.9 kA — that's the ceiling for the 690 V class. The SCCR of your downstream panel must be coordinated with these values; if your available fault current at the board is 65 kA at 240 V, this breaker clears it. Thermal derating is mild: 63 A holds from 40 °C through 50 °C, then drops one amp per 5 °C step to 58 A at 70 °C. If your panel ambient runs 55 °C, you still get 62 A — no need to oversize for a warm cabinet.
Mounting and Integration — Panel Fit
The 3VA1163-3EE46-0AA0 measures 101.6 mm wide, 130 mm tall, and 70 mm deep. It's a standard SENTRON 3VA frame size — mounts on a DIN rail or directly to a backplate via screw terminals. The 4-pole footprint matches the usual 4-module width for three-phase plus neutral switching. No communication module, no undervoltage release, no ground-fault monitoring on this variant — it's a straight line-protection breaker with a TM220 release.