The Siemens 3VA1032-4ED36-0KH0 is a SENTRON molded case circuit breaker (MCCB) rated for 32 A continuous current (Iu) at 40 °C, with a 3-pole configuration and a TM210 thermal-magnetic release. Its interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC, which covers most industrial fault-current scenarios downstream of a transformer. The built-in shunt trip (STL) allows remote tripping via a control signal — useful for emergency-stop circuits or supervisory shutdown. Two auxiliary switches plus a separate trip-alarm switch (HQ) give the PLC or SCADA system discrete status feedback on breaker position and fault events.
Breaking capacity and thermal derating
At 440 V AC the breaker still clears 52.5 kA, and at 690 V AC it holds 11.9 kA — that last figure matters if you are feeding a 690 V drive bank. The thermal derating curve is flat up to 50 °C (full 32 A), then drops 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. If your panel ambient sits above 50 °C, size the load current against the derated value, not the nameplate 32 A.
Panel fit and integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens 3VA mounting plates and most common panel cutouts. Front-face protection is IP40, so it is suitable for dry indoor enclosures but not washdown zones. The shunt trip coil (STL) and auxiliary switch block (2 aux + 1 alarm) are factory-integrated; verify the auxiliary release order code 3VA9688-0BL33 if you need a spare. No communication module, no ground-fault monitoring, and no undervoltage release on this variant — keep that in mind if the spec calls for those functions.