SENTRON 3VA1 MCCB — 32 A, 3-Pole, Line Protection
The Siemens 3VA1132-3EF36-0KA0 is a SENTRON molded case circuit breaker (MCCB) for line protection, rated at 32 A continuous current (Iu) with a TM240 thermal-magnetic overcurrent release. It carries a 75.6 kA interrupting capacity at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — these are the fault-clearing limits at each voltage, not the load rating. The 32 A rating holds flat through 50 °C; above that it derates to 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. That temperature curve matters when the breaker sits in a crowded enclosure with other heat sources — the 32 A figure is only valid up to 50 °C ambient.
Interrupting Capacity and Selectivity
The interrupting ratings at multiple voltages let you coordinate this MCCB downstream of a larger feeder breaker. At 240 V the 75.6 kA figure is high enough for most service-entrance or distribution-panel fault levels in North American 240/120 V split-phase or 240 V delta systems. At 415 V the 52.5 kA covers typical European 400 V industrial networks. The 10.5 kA at 690 V is the limit for 690 V mining or marine applications — confirm the available fault current at the panel before specifying. The TM240 release is thermal-magnetic, so short-circuit response is instantaneous above the magnetic pickup; no electronic adjustment or communication function is fitted (no communication module, no phase-failure detection, no ground-fault monitoring).
Panel Integration and Mounting
Three-pole construction, 76.2 mm wide, 130 mm tall, 70 mm deep. Front IP40 protection — suitable for enclosed panel mounting, not for washdown or outdoor exposure. No auxiliary contacts are fitted (auxiliary contact version: without), so any status feedback requires an external auxiliary switch block. The shunt trip (STL) is integrated as the auxiliary release design; the integrated auxiliary trip order code is 3VA9688-0BL33 for reference. No undervoltage release is installed. Latching endurance is rated at 15,000 operations — adequate for a distribution breaker that cycles infrequently, not for a switching-duty application.