What this MCCB delivers for your line
The Siemens SENTRON 3VA1163-4EE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous at 40 °C, with the TM220 thermal-magnetic trip unit handling overload and short-circuit protection. It is designed for line protection — the primary feeder or distribution breaker in a panel — not for motor starter duty or ground-fault monitoring. Breaking capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V means it can safely interrupt a fault current up to that level without welding contacts or cascading upstream — critical for high-fault panels near large transformers or parallel feeds. The 11.9 kA at 690 V still covers most industrial distribution at that voltage class. Rated insulation voltage is 800 V, so the internal clearances and creepage are designed for 690 V systems with margin. The front face carries IP40 protection — splash protection is not present; this is a panel-mount breaker, not a standalone enclosure unit.
Dimensions and panel fit
The breaker measures 101.6 mm wide, 130 mm high, and 70 mm deep. That 70 mm depth is the body only — add projection for the handle and terminal covers. It mounts on a DIN rail or direct panel-mount via the screw terminals. The 4-pole width (101.6 mm) is standard for a 4-pole MCCB in this frame size; verify the existing panel cutout if replacing a different brand. No undervoltage release, no shunt trip, no communication module on this variant. The TM220 trip is a fixed thermal-magnetic — no electronic adjustment or zone-selective interlocking.
Thermal derating and operating range
The 63 A rating holds from 40 °C up to 50 °C ambient. At 55 °C it derates to 62 A, at 60 °C to 61 A, at 65 °C to 60 A, and at 70 °C to 58 A. Operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Maximum power loss is 17.3 W at rated current — negligible for panel thermal budgeting but worth noting for tightly packed enclosures.