The Siemens SENTRON 3VA2110-5JQ32-0JC0 is a 3-pole molded case circuit breaker rated for 100 A continuous current, fitted with the ETU560 electronic trip unit. It is configured for line protection and includes a shunt trip (STL) auxiliary release plus two auxiliary switches (HQ). The part carries a communication function for integration into monitored distribution systems.
Breaking capacity and selectivity planning
Breaking capacity varies with system voltage: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. These are the values for the 3VA2110-5JQ32-0JC0 per the datasheet — the 4.25 kA figure at 690 V is the limit that governs any 690 V application, not a higher value from a different variant. For selectivity coordination studies, use these published figures rather than a generic family curve.
Thermal derating — the real continuous current
Rated continuous current holds at 100 A from 40 °C through 50 °C. At 55 °C it derates to 96.25 A, at 60 °C to 92.5 A, at 65 °C to 88.75 A, and at 70 °C to 85 A. If the panel ambient runs above 50 °C, the 85 A floor at 70 °C is the figure to size downstream conductors against. Maximum power loss is 10 W.
Mounting and enclosure fit
Dimensions are 86 mm depth, 105 mm width, 181 mm height. The 105 mm width is the panel cutout dimension to verify against existing busbar spacing or MCC bucket layouts. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Rated insulation voltage is 800 V.
Trip unit and auxiliary configuration
The ETU560 electronic trip unit supports adjustable overload and short-circuit protection settings. Ground fault monitoring uses summation current formation on the L-conductor. Latching endurance is 20,000 cycles.