What this MCCB brings to a panel
The Siemens 3VA1032-3ED32-0JC0 is a 3-pole SENTRON molded case circuit breaker rated for 32 A continuous current (Iu) with a TM210 thermal-magnetic release. It carries a 75.6 kA interrupting rating at 240 V and 52.5 kA at 415 V — numbers that tell you it can handle high-fault-current service entrance or distribution positions without cascading upstream. The front face is IP40-rated, so it's fine for a dry indoor panel but not washdown zones.
Thermal derating and real-world current
The 32 A rating holds flat from 40 °C through 50 °C. Above that it starts to step down: 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. If your panel ambient runs hot — say near a transformer or in a non-ventilated enclosure — you need to size the load to the derated figure, not the nameplate 32 A.
Interrupting capability across voltage levels
The interrupting ratings step down as voltage climbs: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. That 7.5 kA at 690 V is the number to watch if you're feeding a 690 V motor drive — it's adequate for most distribution-level faults but not for high-capacity transformer secondaries at that voltage.
Auxiliary contacts and shunt trip
This breaker ships with 2 auxiliary switches (HQ type) and a shunt trip release (STL) integrated. The shunt trip is the factory-fitted option 3VA9688-0BL32. No undervoltage release, no communication module, no ground-fault monitoring — it's a straightforward line-protection breaker with remote trip capability and status feedback via the aux contacts.