What this MCCB delivers for the panel
The Siemens SENTRON 3VA1163-5EE32-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM220 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR). The interrupting capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — numbers that place it in the high-fault tier for industrial distribution panels where available fault current exceeds 100 kA. The 800 V rated insulation voltage (Ui) means it's comfortable on 480 V and 600 V class systems with margin. Front IP40 protection handles the usual panel environment; no trip indicator or communication module on this variant.
Thermal derating and release behavior
The TM220 release holds 63 A flat from 40 °C through 50 °C, then begins to step down: 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. That's a 10% reduction from 50 °C to 70 °C — predictable, but if the panel ambient runs hot you lose headroom. The UVR (undervoltage release) is built in, so a voltage dip below the dropout threshold opens the breaker; verify your control voltage matches the release coil rating from the order code suffix. No phase failure detection or ground fault monitoring on this version.
Physical fit and auxiliaries
Footprint is 76.2 mm wide (roughly 3 inches — standard MCCB pitch), 130 mm tall, 70 mm deep. It carries two HQ auxiliary switches (3VA9608-0BB25) integrated, so you get status feedback without a separate add-on module. The UVR is factory-fitted; no voltage trigger or communication function on this order code. Mounts in a standard panel on a mounting plate or DIN rail adapter — the 70 mm depth leaves room behind the door for wiring gutters.