Siemens 3VA2110-6HN32-0DC0 — SENTRON MCCB for Line Protection
The Siemens 3VA2110-6HN32-0DC0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's a 3-pole unit built on a 1200 A frame, meaning the physical housing and contacts are sized for much higher current, giving this 100 A rating generous thermal margin in the enclosure. Interrupting capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V puts it in the high-interrupting class — suitable for large transformer secondaries or busway feeds where fault current is severe.
Built-in Undervoltage Release and Auxiliary Switches
This breaker ships with an undervoltage release (UVR) and two HQ auxiliary switches factory-installed. The UVR trips the breaker when supply voltage drops below a set threshold — common in safety circuits where a loss of control power must open the main disconnect. The two auxiliary switches give status feedback (open/closed) to a PLC or indicator lamp without needing an add-on block. The design is line protection (not motor protection), so it's intended for feeder or distribution duty rather than direct motor overload. No ground-fault monitoring module is included.
Panel Fit and Dimensions
Dimensions are 86 mm deep, 105 mm wide, 181 mm high. That 105 mm width is standard for a 3-pole MCCB on a 1200 A frame — it will occupy three 35 mm DIN-rail modules worth of panel width, though the breaker itself bolts to a mounting plate rather than snapping onto DIN rail. Verify the mounting hole pattern against your existing backpanel layout.