What this MCCB is and what it does
The Siemens SENTRON 3VA1132-6EF36-0DH0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 32 A at 40 °C, with minimal derating up to 70 °C (30 A at 70 °C). The real differentiator here is the interrupting capacity: 220 kA at 240 V AC, 154 kA at 415 V, and still 121 kA at 440 V — that's high-fault-duty territory, typically found on the secondary side of large transformers or in industrial mains where available fault current is severe. At 500 V and 690 V the rating drops to 17 kA, so verify the system voltage against the fault-current curve before committing the BOM line.
Built-in undervoltage release and auxiliary switch complement
This variant ships with an undervoltage release (UVR) factory-installed — the designation in the order code flags that. The UVR trips the breaker when supply voltage drops below a threshold, which is standard for motor feeder circuits that need to prevent automatic restart after a brownout. It also carries two auxiliary switches plus a separate trip-alarm switch (HQ), giving the panel builder status feedback without adding external interposing relays. The auxiliary release type is listed as undervoltage release (UVR), and the design of the auxiliary switch is 2 auxiliary switches + 1 trip alarm switch HQ.
Panel fit and physical integration
Physical dimensions: 130 mm height, 76.2 mm width, 70 mm depth. That 70 mm depth is the dimension that matters most when fitting into a shallow gland plate or a tight enclosure backpan — it's the projection from the mounting surface to the front of the breaker body. The 76.2 mm width (3 inches) is standard for a 3-pole MCCB in this frame size, so it should drop into existing SENTRON 3VA panel cutouts without re-drilling. Mounting is screw-fixed to the backpan; no DIN-rail adapter on this frame class.