SENTRON 3VA2110-5HN32-0CH0 — 100 A MCCB with ETU350 Trip Unit
The Siemens SENTRON 3VA2110-5HN32-0CH0 is a 3-pole molded case circuit breaker rated for 100 A continuous current, fitted with an ETU350 electronic trip unit for line protection. It carries a 187 kA interrupting capacity at 240 V, stepping down to 121 kA at 415/440 V, 79 kA at 500 V, and 4.25 kA at 690 V — the ratings that tell you whether this breaker holds the fault current at your transformer secondary or main distribution point. Thermal derating is published in 5 °C steps from 40 °C to 70 °C: the breaker carries its full 100 A up to 50 °C, then drops to 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. If your panel ambient sits above 50 °C, that 85 A ceiling at 70 °C is the number to size against — not the nameplate 100 A.
Dimensions & Panel Fit
The breaker measures 105 mm wide × 181 mm tall × 86 mm deep. That 105 mm width (about 4.1 inches) is the standard 3-pole MCCB footprint for this class — it fits SENTRON mounting plates and most DIN-rail adapters without overhang. The 86 mm depth includes the arc chamber and terminal clearance; verify gland-plate depth if the panel door closes tight against the breaker face.
Trip Unit & Auxiliary Wiring
The ETU350 electronic release provides adjustable overload and short-circuit protection with an integral trip indicator. An undervoltage release (UVR) is factory-fitted — part of the order-code suffix 0CH0 — so the breaker drops open on loss of control voltage. Auxiliary contacts include 2 form-C auxiliary switches plus 1 trip-alarm switch (HQ version), and the integrated auxiliary trip (3VA9608-0BB24) is wired separately for remote shunt-trip or alarm signalling.
Environmental & Compliance
Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Maximum power loss is 12.5 W — negligible for panel thermal budgeting but worth noting if the breaker is enclosed in a small, sealed sub-panel. Rated insulation voltage (Ui) is 800 V, consistent with 690 V breaking capacity.