What this MCCB carries and where it fits
The Siemens SENTRON 3VA1132-3EF32-0HC0 is a 3-pole molded case circuit breaker rated for 32 A continuous current (Iu) with a TM240 thermal-magnetic overcurrent release. Its 75.6 kA interrupting capacity at 240 V AC handles high-fault scenarios typical of distribution panels and motor control centers, while the 800 V rated insulation voltage (Ui) gives headroom for 690 V line-to-line systems. The 70 mm depth and 76.2 mm width fit standard panel-mount cutouts — no special adapter plate needed for a 3-pole MCCB footprint. Rated continuous current holds at 32 A up to 50 °C ambient; above that it derates gradually to 28.8 A at 70 °C. That means in a warm enclosure — say a non-ventilated panel near a furnace line — you plan for the 30.72 A at 55 °C or 29.44 A at 65 °C, not the 32 A nameplate. The TM240 release is fixed-trip, so no field adjustment on the thermal curve; the breaker is sized for a specific load and stays there.
Breaking capacity across voltage levels
Interrupting rating drops with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. That 10.5 kA at 690 V is the number to check if the breaker feeds a 690 V drive or transformer primary — it is still adequate for most industrial installations where the prospective fault current at that voltage is under 10 kA, but verify against the utility's available fault current at the point of common coupling.
Built-in auxiliary and shunt trip
Factory-fitted with 2 auxiliary switches (HQ type) and a shunt trip release (STL). The shunt trip allows remote tripping from an E-stop or PLC output — common for emergency-off circuits or interlocked disconnects. The integrated auxiliary trip module carries order code 3VA9688-0BL30, which is the spare part number if the shunt trip coil needs replacement without swapping the whole breaker.