What this MCCB is and what it carries
The Siemens SENTRON 3VA2110-5JQ32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current (Iu) and fitted with an ETU560 electronic trip unit. It is configured for line protection — the standard role of guarding a feeder or distribution bus against overload and short-circuit faults.
Breaking capacity — what the voltages tell you
The interrupting rating is voltage-dependent, as you would expect for an MCCB. At 240 V it clears 187 kA; at 415 V and 440 V that drops to 121 kA, then 79 kA at 500 V, and 4.25 kA at 690 V. The 690 V figure is the one to check if this breaker feeds a 690 V distribution — 4.25 kA is modest for that voltage class, so confirm the available fault current at the point of installation.
Thermal derating and operating range
It carries a full 100 A from 40 °C through 50 °C ambient. Above that, derating applies: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. The operating ambient range is -25 °C to +70 °C, with storage from -40 °C to +80 °C. If the panel ambient runs hot, the 85 A floor at 70 °C still leaves headroom for most 100 A feeders.
Built-in auxiliaries and trip options
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), a shunt trip release (STL) for remote tripping, and a summation-current ground-fault monitoring arrangement on the L-conductor. The integrated auxiliary trip module is order code 3VA9688-0BL30. The base switch itself is 3VA2110-5JQ32-0AA0 — the -0HH0 suffix adds the communication function and the specific auxiliary/trip package.
Panel fit — dimensions and mounting
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. It mounts on a DIN rail or can be screw-fixed to a backplate. The 105 mm width is standard for a 3-pole 100 A frame in the 3VA2 series — it occupies the same footprint as other 3VA2 breakers in this current class, so swapping between variants within the series doesn't require re-drilling the gland plate.