The Siemens SENTRON 3VA1163-5EE32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 63 A. Its breaking capacity hits 187 kA at 240 V and still holds 121 kA at 415 V — that's the headroom you need for high-fault panels where a standard MCCB would weld closed on a bolted fault.
Breaking capacity across the voltage range
This breaker's interrupting rating drops as voltage rises: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. That curve tells you where it's comfortable — it's built for 400 V class distribution where the SCCR at the panelboard lands around 65–100 kA. At 690 V the 17 kA limit means it's not your primary for a 690 V motor center unless the available fault is low.
Thermal derating — what the 63 A actually means at panel ambient
The TM220 thermal-magnetic release holds 63 A continuous from 40 °C through 50 °C. Above that it starts 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. If your panel runs hot — say 55 °C inside a sealed NEMA 12 enclosure — you lose about 2.5 A of headroom. The rated insulation voltage is 800 V, so the dielectric margin is there even at elevated temperature.
Undervoltage release and auxiliary release options
This variant ships with an integrated undervoltage release (UVR) — the auxiliary release design is specifically an undervoltage release, part of the 3VA9608-0BB11 family. That means it will trip if control voltage drops, which is useful for safety circuits that need to drop the main breaker on a power-loss condition. No auxiliary contact version is included (order separately if you need status feedback), and there is no communication function or ground fault monitoring on this build.
Physical fit and mounting
Dimensions: 130 mm height, 76.2 mm width (3-pole), 70 mm depth. The front face carries an IP40 protection class — fine for a clean indoor panel, but not for washdown areas. Mounts with screw terminals; no plug-in base on this variant. The 76.2 mm width matches the standard 3-pole MCCB footprint on a DIN rail or panel-mount adapter.