What the interrupting ratings mean for panel coordination
The Siemens SENTRON 3VA1132-4EF32-0CH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 32 A continuous current (Iu) at 40 °C through 50 °C ambient, with a slight thermal derating curve above that — 30.72 A at 55 °C, 30.08 A at 60 °C, 29.44 A at 65 °C, and 28.8 A at 70 °C. The interrupting 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 690 V. The 690 V figure (11.9 kA) is lower but still adequate for motor control centers where the transformer impedance limits available fault current to well under that.
TM240 release and auxiliary configuration
The overcurrent release is the TM240 thermal-magnetic type — fixed thermal pickup at 32 A, magnetic short-circuit trip set at the factory. This is a line-protection MCCB, not a motor-protection breaker; the TM240 curve is optimized for cable and busbar protection, not for motor inrush. The UVR part number for the auxiliary trip is 3VA9608-0BB24.
Panel integration and mounting dimensions
The 3-pole design with the factory-fitted auxiliary contacts and UVR occupies a fixed footprint; no additional modules are needed for the basic trip and alarm functions.