What this MCCB carries — and where it fits
The Siemens SENTRON 3VA1163-5ED32-0KH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic release for line protection. It's built for high-fault panels: interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V, and still holds 75.6 kA at 440 V — numbers that tell you this breaker is sized for transformer secondaries or large motor control centers where fault current runs hot. The shunt trip release (3VA9688-0BL33) is integrated, and the auxiliary contact block gives you 2 auxiliary switches plus a separate trip alarm switch — enough for remote status and fault annunciation without stacking add-ons. No undervoltage release, no communication module, no ground-fault monitoring on this variant; it's a straight line-protection breaker with remote-trip capability.
Thermal derating — what the 63 A rating really means at panel temperature
The 63 A rating holds flat from 40 °C through 50 °C, then starts a gentle roll-off: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If your panel ambient runs above 50 °C — say, inside a non-ventilated enclosure next to a drive — you'll need to account for that 6.3 A drop at the top end. The rated insulation voltage is 800 V, and storage range covers -40 °C to 80 °C, so it handles cold warehouses and hot shipping containers without issue.
Mounting and panel fit
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON distribution blocks and panel-mount kits. Front protection is IP40, so it's fine inside a closed enclosure but not for washdown areas. Latching endurance is rated at 15,000 operations, which is typical for a distribution breaker that sees infrequent switching.